{"title":"Unit Instruments","description":"\u003cp\u003eUnit Instruments, a benchmark in precision gas flow control and pressure measurement, provides high-performance Mass Flow Controllers (MFCs), Mass Flow Meters (MFMs), and specialized pressure transducers tailored for semiconductor manufacturing, thin-film deposition, and industrial process automation. Designed with high-stability thermal mass flow sensors, metallic seal integrity, and rapid dynamic response circuitry, Unit Instruments devices deliver precise, repeatable gas dispensing across critical process loops. Our inventory features legendary series including the UFC-1100, UFC-7300, and UFC-8100 series controllers, supporting multiple gas calibrations, high-purity metal seals (VCR), and analog or DeviceNet communication protocols. Whether you are replacing legacy MFC spares or sourcing calibrated flow control components for OEM tools, our range of genuine Unit Instruments products ensures zero-drift operation, fast thermal response, and reduced process contamination in high-vacuum environments.\u003cbr\u003e\u003c\/p\u003e","products":[{"product_id":"ufc-1660-unit-instruments-1660-series-precision-analog-mfc","title":"UFC-1660 UNIT Instruments 1660 Series Precision Analog MFC","description":"\u003ch3\u003e\u003cstrong\u003eUFC-1660 UNIT Instruments Analog Mass Flow Controller\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eUNIT Instruments UFC-1660\u003c\/strong\u003e is an analog mass flow controller from the \u003cstrong\u003e1660 Series\u003c\/strong\u003e. It combines a high-purity metal-seal gas path with the proven Unit 132 proportional electromagnetic valve. The platform supports semiconductor process gas delivery where pressure capability, repeatable flow regulation, and clean wetted surfaces matter.\u003c\/p\u003e\n\n\u003cp\u003eThis base analog configuration covers full-scale flow ranges from \u003cstrong\u003e3 sccm to 30 slm\u003c\/strong\u003e, based on nitrogen-equivalent flow. It uses 0–5 VDC setpoint and monitor signals for equipment integration. Its metal-seal construction and broad pressure envelope make it suitable for high-purity gas panels and semiconductor process tools.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003e01 | Process Fit: Where the UFC-1660 Belongs\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe UFC-1660 addresses gas delivery requirements in semiconductor manufacturing. Its analog control architecture suits equipment that uses conventional voltage-based command and monitoring signals.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlasma etching:\u003c\/strong\u003e Regulates process gas delivery to etch chambers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical vapor deposition (CVD):\u003c\/strong\u003e Supports controlled gas flow during film deposition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiffusion:\u003c\/strong\u003e Provides repeatable gas delivery for thermal processing equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEpitaxy (EPI):\u003c\/strong\u003e Supports gas flow regulation in epitaxial growth systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSputtering:\u003c\/strong\u003e Controls process gas supply in physical vapor deposition equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-purity gas panels:\u003c\/strong\u003e Integrates into gas distribution systems using compatible analog controls.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe specified gas compatibility includes non-corrosive and moderately corrosive process gases. The standard calibration is nitrogen-based. Confirm gas compatibility and calibration requirements before applying the controller to a particular process chemistry.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003e02 | Flow Regulation: Accuracy Across the Working Range\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe UFC-1660 provides a 2% to 100% full-scale control range. Its accuracy specification changes according to the operating point, so engineers should evaluate the required process setpoint against the selected range.\u003c\/p\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePerformance Parameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFull-scale flow range\u003c\/td\u003e\n\u003ctd\u003e3 sccm to 30 slm, N2 equivalent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy above 35% FS\u003c\/td\u003e\n\u003ctd\u003e±1% FS, analog model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy below 35% FS\u003c\/td\u003e\n\u003ctd\u003e±0.35% FS, analog model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRepeatability\u003c\/td\u003e\n\u003ctd\u003e±0.15% FS, per SEMI E56-96\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLinearity\u003c\/td\u003e\n\u003ctd\u003e±0.5% FS, per SEMI E27-92\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl range\u003c\/td\u003e\n\u003ctd\u003e2% to 100% FS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFast-start settling time\u003c\/td\u003e\n\u003ctd\u003e≤1.0 second, per SEMI E17-91\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoft-start ramp\u003c\/td\u003e\n\u003ctd\u003eLinear, 20% per second\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThe fast-start and soft-start specifications describe different operating behaviors. Fast start supports settling after a setpoint change. Soft start applies a controlled linear ramp at 20% per second. Select the appropriate start behavior according to the process sequence and equipment requirements.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003e03 | Pressure Envelope and Gas Delivery Conditions\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe 1660 platform supports demanding gas supply conditions. Its rated pressure limits should be considered separately during system design.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum operating pressure:\u003c\/strong\u003e 3,500 kPa (500 psi)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProof pressure:\u003c\/strong\u003e 10,500 kPa (1,500 psi)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDifferential pressure:\u003c\/strong\u003e 6.65–350 kPa (50 torr–50 psid)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure coefficient:\u003c\/strong\u003e 0.007% of reading per psi, N2\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eMaximum operating pressure defines the stated operating limit. Proof pressure is a separate pressure-resistance rating and should not be treated as a normal operating condition. Differential pressure must also remain within the specified range to support the required flow performance.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003e04 | High-Purity Flow Path: Metal Seals and Surface Finish\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe UFC-1660 uses a metal-sealed wetted assembly designed for high-purity gas service. Its standard internal surface finish is \u003cstrong\u003e16 micro-inch Ra\u003c\/strong\u003e, with a \u003cstrong\u003e10 micro-inch Ra option\u003c\/strong\u003e specified for applications requiring a finer finish.\u003c\/p\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConstruction Detail\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWetted materials\u003c\/td\u003e\n\u003ctd\u003e316L stainless steel, K-M43, 304 stainless steel, and 7Mo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard surface finish\u003c\/td\u003e\n\u003ctd\u003e16 micro-inch Ra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional surface finish\u003c\/td\u003e\n\u003ctd\u003e10 micro-inch Ra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeal type\u003c\/td\u003e\n\u003ctd\u003eMetal seal, C-seal or W-seal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat material\u003c\/td\u003e\n\u003ctd\u003eKel-F or metal seat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLeak integrity\u003c\/td\u003e\n\u003ctd\u003e1 × 10\u003csup\u003e-10\u003c\/sup\u003e atm-cc\/sec He, per SEMI E16-90\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThe metal-seal configuration supports applications where elastomer-free sealing is preferred. However, the exact seal and seat configuration should be confirmed against the ordered unit. Do not assume every UFC-1660 uses the same combination.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003e05 | Unit 132 Valve: Proportional Electromagnetic Control\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe UFC-1660 uses the \u003cstrong\u003eUnit 132 proportional electromagnetic valve\u003c\/strong\u003e for flow regulation. The platform also specifies normally-closed or normally-open solenoid configurations.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve platform:\u003c\/strong\u003e Unit 132 proportional electromagnetic valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve action options:\u003c\/strong\u003e Normally closed or normally open\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl function:\u003c\/strong\u003e Proportional gas-flow regulation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eValve action affects the default gas-path state when the valve is not energized. Engineers should verify the required configuration against the tool's shutdown sequence and gas isolation strategy. Confirm the installed valve option before commissioning or replacement.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003e06 | Analog Interface and Electrical Requirements\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThis UFC-1660 configuration is the analog base model of the 1660 family. It uses voltage signals for setpoint input and flow monitoring rather than relying on a native digital communication interface.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSetpoint input:\u003c\/strong\u003e 0–5 VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonitor output:\u003c\/strong\u003e 0–5 VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector options:\u003c\/strong\u003e 20-pin card edge or 9\/15-pin D-sub\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower supply:\u003c\/strong\u003e +15 VDC, 100 mA maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNegative supply:\u003c\/strong\u003e -15 VDC, 200 mA maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum power consumption:\u003c\/strong\u003e 4.5 W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto-zero:\u003c\/strong\u003e Optional on analog configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eBefore installation, identify the connector type and verify the equipment-side pin assignment. Confirm signal scaling, supply polarity, and available current capacity. Auto-zero availability should also be checked against the specific configuration. The stated standard auto-zero feature on digital models should not be assumed for this analog base model.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003e07 | Thermal Behavior and Long-Term Stability\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe standard UFC-1660 is an unheated model. Its specified operating temperature range is 0–50°C. Temperature and pressure variations can affect measured flow, so system conditions should remain controlled during process operation.\u003c\/p\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e0–50°C (32–122°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeated configuration\u003c\/td\u003e\n\u003ctd\u003eNo; standard unheated version\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZero stability\u003c\/td\u003e\n\u003ctd\u003e≤0.6% FS per year, without auto-zero\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZero temperature coefficient\u003c\/td\u003e\n\u003ctd\u003e0.05% FS\/°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpan temperature coefficient\u003c\/td\u003e\n\u003ctd\u003e0.1% FS\/°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eFor applications with changing ambient temperature, consider the stated zero and span coefficients when evaluating measurement stability. Where the analog unit does not include auto-zero, include zero verification in the equipment maintenance plan.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003e08 | Mechanical Envelope and Installation Planning\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eApproximate dimensions (H × W × D):\u003c\/strong\u003e 137 × 127 × 38 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFootprint:\u003c\/strong\u003e 1.5-inch footprint\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4 VCR overall length:\u003c\/strong\u003e 124 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.2 kg (2.65 lb)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eCheck the applicable mechanical drawing before preparing the mounting plate or gas-line connections. The stated dimensions are approximate. Confirm the connector clearance, port orientation, and overall installed length against the actual unit configuration.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003e09 | Commissioning Checklist for Equipment Engineers\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentify the gas:\u003c\/strong\u003e Confirm the process gas and its compatibility with the wetted materials and seal configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify calibration:\u003c\/strong\u003e The supplied calibration is nitrogen-based. Confirm whether the process requires an applicable gas calibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatch the flow range:\u003c\/strong\u003e Check the required operating setpoint against the selected full-scale range and 2–100% FS control range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck pressure conditions:\u003c\/strong\u003e Verify supply pressure and differential pressure before enabling flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm the valve option:\u003c\/strong\u003e Check normally-open or normally-closed behavior against the equipment's operating sequence.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect the interface:\u003c\/strong\u003e Match the card-edge or D-sub connector, 0–5 VDC signals, and power requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValidate response:\u003c\/strong\u003e Test fast-start settling and soft-start ramp behavior in the actual gas delivery system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecord baseline values:\u003c\/strong\u003e Document zero output, setpoint response, and operating pressure for future maintenance comparison.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003e\u003cstrong\u003e10 | Compliance and Calibration References\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe UFC-1660 specifications reference the following standards and certifications:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCE:\u003c\/strong\u003e CE certified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSEMI E12:\u003c\/strong\u003e Referenced compliance standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSEMI E16-90:\u003c\/strong\u003e Leak integrity reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSEMI E17-91:\u003c\/strong\u003e Fast-start settling-time reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSEMI E27-92:\u003c\/strong\u003e Linearity reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSEMI E56-96:\u003c\/strong\u003e Repeatability reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration:\u003c\/strong\u003e NIST-traceable calibration\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eConfirm the applicable documentation and configuration-specific compliance records when qualifying the controller for a production tool.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003e11 | Engineering FAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ1: Can the UFC-1660 replace a mass flow controller that uses a digital communication bus?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eNot as a direct electrical substitute. This analog base model uses 0–5 VDC setpoint and monitor signals. A replacement project must verify the host controller's signal interface, connector wiring, scaling, and control logic. If the existing system depends on digital communication, check whether the equipment supports an analog interface before selecting this model.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ2: What should be considered when selecting C-seal versus W-seal construction?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eSelection depends on the specified gas connection, sealing arrangement, and equipment interface. Confirm the required seal geometry and compatible mating hardware from the unit drawing or procurement specification. Do not select a seal solely by its name or assume the two configurations are interchangeable.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ3: How should engineers evaluate the 10 micro-inch Ra surface-finish option?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eStart with the process cleanliness specification and the requirements of the gas distribution system. The standard finish is 16 micro-inch Ra, while 10 micro-inch Ra is an optional configuration. Confirm that the ordered unit includes the required finish and supporting documentation if the process qualification specifies it.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ4: What can cause a flow reading to shift after a gas panel has been serviced?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eCommon items to investigate include changed supply pressure, trapped gas, connection contamination, altered line restrictions, and disturbed electrical connections. First stabilize the gas supply and compare the actual differential pressure with the operating requirement. Then verify the zero output and command signal before changing calibration settings.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ5: How should the soft-start function be considered when sequencing multiple gas lines?\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe specified soft-start ramp is linear at 20% per second. When several gas lines start together, consider how their individual ramp profiles affect chamber pressure and process timing. Validate the sequence at the equipment level, especially where gas introduction order or pressure transients influence the process recipe.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eUFC-1660 Product Selection Summary\u003c\/strong\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eUNIT Instruments UFC-1660\u003c\/strong\u003e is an analog high-purity mass flow controller built around the 1660 Series metal-seal platform and Unit 132 proportional electromagnetic valve. It offers 3 sccm to 30 slm N2-equivalent ranges, 0–5 VDC control, and a high-pressure operating envelope. Its configuration is best evaluated by matching gas compatibility, seal type, valve action, connector, and calibration requirements to the existing process equipment.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eContact us for UFC-1660 availability, configuration confirmation, and a quotation.\u003c\/strong\u003e\u003c\/p\u003e","brand":"UNIT Instruments","offers":[{"title":"Default Title","offer_id":68027821490358,"sku":"UFC-1660","price":196.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/UFC-1660.jpg?v=1794283183"},{"product_id":"ufc-8100-unit-instruments-analog-mass-flow-controller-8100-series","title":"UFC-8100 UNIT Instruments Analog Mass Flow Controller 8100 Series","description":"\n\u003ch3\u003e\u003cb\u003eUFC-8100 | UNIT Instruments High-Flow Analog Mass Flow Controller\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e\u003cspan style=\"color: #0070C0;\"\u003eUNIT Instruments UFC-8100\u003c\/span\u003e\u003c\/strong\u003e is an elastomer-sealed analog mass flow controller designed for high-flow process gas applications. It belongs to the 8100 Series and supports nitrogen-equivalent flow ranges from 3 sccm to 30 slm.\u003c\/p\u003e\n\n\u003cp\u003eThe controller combines a proportional electromagnetic control valve, precision flow measurement, and a 0–5 VDC analog interface. Its design supports non-corrosive semiconductor gases and general industrial gas delivery systems.\u003c\/p\u003e\n\n\u003cp\u003eWith a maximum operating pressure of 3,500 kPa (500 psi), the UFC-8100 addresses applications that require higher pressure capability than many conventional analog MFC configurations. Its fast-start response, low-flow control range, and elastomer-sealed construction also make it a candidate for selected analog MFC replacement projects.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eENGINEERING PROFILE | Key Specifications\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eSpecification\u003c\/th\u003e\n    \u003cth\u003eValue\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eManufacturer\u003c\/td\u003e\n    \u003ctd\u003eUNIT Instruments\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eModel\u003c\/td\u003e\n    \u003ctd\u003e\u003cstrong\u003eUFC-8100\u003c\/strong\u003e\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eProduct Series\u003c\/td\u003e\n    \u003ctd\u003e8100 Series\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eProduct Type\u003c\/td\u003e\n    \u003ctd\u003eHigh-Flow Analog Mass Flow Controller\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSeal Design\u003c\/td\u003e\n    \u003ctd\u003eElastomer Seal\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eFull-Scale Flow Range\u003c\/td\u003e\n    \u003ctd\u003e3 sccm to 30 slm, N2 equivalent\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eAnalog Accuracy\u003c\/td\u003e\n    \u003ctd\u003e±1% FS; ±0.35% FS below 35% FS\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eRepeatability\u003c\/td\u003e\n    \u003ctd\u003e±0.15% FS, per SEMI E56-96\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eLinearity\u003c\/td\u003e\n    \u003ctd\u003e±0.5% FS, per SEMI E27-92\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eControl Range\u003c\/td\u003e\n    \u003ctd\u003e2–100% FS\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eFast-Start Response\u003c\/td\u003e\n    \u003ctd\u003e≤1.0 second, per SEMI E17-91\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSoft-Start Function\u003c\/td\u003e\n    \u003ctd\u003eLinear ramp at 20% per second; 0–100% in 5 seconds\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eZero Stability\u003c\/td\u003e\n    \u003ctd\u003e≤0.6% FS per year without auto-zero\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eOperating Temperature\u003c\/td\u003e\n    \u003ctd\u003e0–50°C (32–122°F)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eHeating Configuration\u003c\/td\u003e\n    \u003ctd\u003eStandard unheated version\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMTBF\u003c\/td\u003e\n    \u003ctd\u003e536,000 hours, as specified\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eCertification\u003c\/td\u003e\n    \u003ctd\u003eCE certified; specified SEMI compliance\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e\u003cb\u003e01 \/ FLOW CONTROL PERFORMANCE\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe UFC-8100 provides a 2–100% FS control range. This allows the controller to regulate flow from low operating points through its rated full-scale range.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast response:\u003c\/strong\u003e The specified fast-start response is no more than 1.0 second under the referenced SEMI test method.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eControlled ramping:\u003c\/strong\u003e Soft start increases the setpoint at 20% FS per second, reaching 100% in five seconds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasurement consistency:\u003c\/strong\u003e Repeatability is specified at ±0.15% FS.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow accuracy:\u003c\/strong\u003e The analog model specifies ±1% FS overall and ±0.35% FS below 35% FS.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong-term stability:\u003c\/strong\u003e Zero stability is specified at ≤0.6% FS per year without auto-zero.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eEngineering interpretation:\u003c\/strong\u003e Accuracy, repeatability, and linearity describe different performance characteristics. They should not be treated as interchangeable values when assessing process tolerance.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003e02 \/ PRESSURE AND GAS-PATH DESIGN\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eParameter\u003c\/th\u003e\n    \u003cth\u003eSpecification\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMaximum Operating Pressure\u003c\/td\u003e\n    \u003ctd\u003e3,500 kPa (500 psi)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eProof Pressure\u003c\/td\u003e\n    \u003ctd\u003e10,500 kPa (1,500 psi)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eDifferential Pressure\u003c\/td\u003e\n    \u003ctd\u003e6.65–350 kPa (50 torr–50 psid)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eWetted Materials\u003c\/td\u003e\n    \u003ctd\u003e316L stainless steel, K-M45, 304 stainless steel, and 7Mo+\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSurface Finish\u003c\/td\u003e\n    \u003ctd\u003e32 micro-inch Ra\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eElastomer Seals\u003c\/td\u003e\n    \u003ctd\u003eViton or Neoprene O-rings\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eValve Seat Options\u003c\/td\u003e\n    \u003ctd\u003eKel-F or metal seat\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eHelium Leak Integrity\u003c\/td\u003e\n    \u003ctd\u003e1 × 10⁻⁹ atm·cc\/sec, per SEMI E16-90\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThe gas-contact construction combines stainless steel components with elastomer sealing elements. The specified surface finish supports process gas path requirements, while the selected seal and valve seat determine application compatibility.\u003c\/p\u003e\n\n\u003cp\u003eThe proof-pressure rating is a pressure qualification value, not a normal operating target. Do not operate the controller continuously at proof pressure.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003e03 \/ ANALOG INTERFACE AND VALVE OPERATION\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe standard UFC-8100 configuration uses an analog electrical interface. It connects to the host equipment through a 20-pin card edge connector.\u003c\/p\u003e\n\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eElectrical Item\u003c\/th\u003e\n    \u003cth\u003eSpecification\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSetpoint Signal\u003c\/td\u003e\n    \u003ctd\u003e0–5 VDC\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMonitor Signal\u003c\/td\u003e\n    \u003ctd\u003e0–5 VDC\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eConnector\u003c\/td\u003e\n    \u003ctd\u003e20-pin card edge connector\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003ePositive Supply\u003c\/td\u003e\n    \u003ctd\u003e+15 VDC, 100 mA maximum\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eNegative Supply\u003c\/td\u003e\n    \u003ctd\u003e−15 VDC, 200 mA maximum\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eMaximum Power Consumption\u003c\/td\u003e\n    \u003ctd\u003e4.5 W\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eControl Valve\u003c\/td\u003e\n    \u003ctd\u003eProportional electromagnetic UNIT 132 valve\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eValve Configuration\u003c\/td\u003e\n    \u003ctd\u003eNormally closed or normally open, depending on configuration\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThe proportional electromagnetic valve regulates gas flow in response to the analog control signal. The selected valve configuration determines its behavior when electrical power is removed.\u003c\/p\u003e\n\n\u003cp\u003eBefore connecting the controller, verify the 20-pin connector assignment, signal common, supply polarity, and host equipment input\/output scaling. Do not assume pin compatibility with another manufacturer's analog MFC.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003e04 \/ TEMPERATURE AND PRESSURE SENSITIVITY\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eCharacteristic\u003c\/th\u003e\n    \u003cth\u003eSpecified Value\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eZero Temperature Coefficient\u003c\/td\u003e\n    \u003ctd\u003e0.05% FS\/°C\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eSpan Temperature Coefficient\u003c\/td\u003e\n    \u003ctd\u003e0.1% FS\/°C\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003ePressure Coefficient\u003c\/td\u003e\n    \u003ctd\u003e0.007% of reading per psi, N2\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eOperating Temperature\u003c\/td\u003e\n    \u003ctd\u003e0–50°C\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eTemperature changes can affect zero and span performance. Pressure changes can also influence the indicated flow. For critical processes, maintain stable operating conditions and evaluate calibration performance under representative process pressure and temperature.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003e05 \/ MECHANICAL CONFIGURATION\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eMechanical Parameter\u003c\/th\u003e\n    \u003cth\u003eValue\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eApproximate Dimensions (H × W × D)\u003c\/td\u003e\n    \u003ctd\u003e137 × 127 × 38 mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eFootprint\u003c\/td\u003e\n    \u003ctd\u003eApproximately 1.5 inches\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003e1\/4 VCR Overall Length\u003c\/td\u003e\n    \u003ctd\u003e124 mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eWeight\u003c\/td\u003e\n    \u003ctd\u003e1.2 kg (2.65 lb)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eStandard Heating\u003c\/td\u003e\n    \u003ctd\u003eUnheated\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eCheck the actual dimensional drawing before installation. The stated overall dimensions and 1\/4 VCR length refer to different dimensional references and should not be substituted for a port-to-port drawing.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003e06 \/ PROCESS APPLICATIONS\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe 8100 Series is designed for non-corrosive process gas control. Typical applications include:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSemiconductor gas delivery:\u003c\/strong\u003e Nitrogen, argon, helium, oxygen, hydrogen, and other compatible process gases.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDeposition equipment:\u003c\/strong\u003e Gas supply control for selected CVD and PVD processes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEtching systems:\u003c\/strong\u003e Flow regulation for compatible non-corrosive process gases.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGeneral process gas control:\u003c\/strong\u003e Analog flow regulation in industrial gas systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEquipment upgrades:\u003c\/strong\u003e Replacement of selected elastomer-sealed analog mass flow controllers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eGas compatibility must be checked against the actual wetted materials, seal compound, valve seat, and gas purity requirements. The general gas list does not establish universal compatibility with every configuration.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003e07 \/ REPLACEMENT ENGINEERING CHECKPOINTS\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003eThe manufacturer describes the UFC-8100 as a drop-in replacement candidate for elastomeric MFCs. However, a reliable replacement requires more than matching the flow range.\u003c\/p\u003e\n\n\u003col\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlow calibration:\u003c\/strong\u003e Confirm nitrogen-equivalent full scale and the calibration gas used by the existing controller.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMechanical interface:\u003c\/strong\u003e Compare fitting type, port orientation, footprint, and overall length.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectrical connection:\u003c\/strong\u003e Check the 20-pin card edge connector and every relevant pin assignment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSignal scaling:\u003c\/strong\u003e Confirm 0–5 VDC setpoint and monitor compatibility with the equipment controller.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure conditions:\u003c\/strong\u003e Verify operating pressure and available differential pressure at actual process flow.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGas-path materials:\u003c\/strong\u003e Confirm the elastomer, valve seat, and metal materials are suitable for the process gas.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eValve fail position:\u003c\/strong\u003e Select the correct normally-open or normally-closed configuration for the process shutdown strategy.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eFor replacement projects, obtain the existing MFC model number, gas type, full-scale range, connector information, and fitting details. These details help establish whether the proposed replacement is electrically and mechanically compatible.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003e08 \/ INSTALLATION AND MAINTENANCE GUIDANCE\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eInstall the controller in a clean gas line with suitable upstream filtration.\u003c\/li\u003e\n  \u003cli\u003eUse compatible fittings and follow the specified connection manufacturer's assembly procedure.\u003c\/li\u003e\n  \u003cli\u003eAvoid applying mechanical stress to the body or gas connections during installation.\u003c\/li\u003e\n  \u003cli\u003eConfirm that process pressure remains within the operating limits.\u003c\/li\u003e\n  \u003cli\u003eVerify both DC supply rails before applying the analog command.\u003c\/li\u003e\n  \u003cli\u003eAllow the equipment to stabilize before checking zero and flow performance.\u003c\/li\u003e\n  \u003cli\u003eInvestigate zero drift, unstable output, and slow response before replacing the unit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eCommon diagnostic checks include gas supply pressure, line restrictions, connector integrity, power stability, analog signal scaling, and gas calibration. For a persistent deviation, compare measured flow with a calibrated reference instrument under controlled conditions.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003e09 \/ COMPLIANCE AND CALIBRATION\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE:\u003c\/strong\u003e CE certified, according to the supplied product information.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSEMI E12:\u003c\/strong\u003e Specified compliance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSEMI E16-90:\u003c\/strong\u003e Referenced for helium leak integrity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSEMI E17-91:\u003c\/strong\u003e Referenced for fast-start response.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSEMI E27-92:\u003c\/strong\u003e Referenced for linearity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSEMI E56-96:\u003c\/strong\u003e Referenced for repeatability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCalibration:\u003c\/strong\u003e NIST-traceable calibration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eSEMI references identify the stated performance or compliance basis. Confirm the applicable revision, test report, and certification documents when project specifications require formal evidence.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003e10 \/ SUPPLY AND COMMERCIAL INFORMATION\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003ctable\u003e\n  \u003ctr\u003e\n    \u003cth\u003eSupply Item\u003c\/th\u003e\n    \u003cth\u003eDetails\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eProduct\u003c\/td\u003e\n    \u003ctd\u003eUNIT Instruments UFC-8100\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eProduct Condition\u003c\/td\u003e\n    \u003ctd\u003eNew \u0026amp; Original in Factory Packing\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eWarranty\u003c\/td\u003e\n    \u003ctd\u003eFactory Warranty: 12 Months\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eShipping\u003c\/td\u003e\n    \u003ctd\u003eFedEx, UPS, DHL\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd\u003eTechnical Confirmation\u003c\/td\u003e\n    \u003ctd\u003eModel and configuration verification available upon inquiry\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eContact Global PLC Spare HUB for pricing, stock availability, and configuration confirmation. Please provide the required flow range, process gas, fitting type, and valve action when requesting a quotation.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eGLOBAL PLC SPARE HUB | APPLICATION ENGINEERING NOTES\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003eOne important selection issue is the difference between full-scale accuracy and low-range accuracy. The stated analog accuracy is ±1% FS, while the specification also lists ±0.35% FS below 35% FS. Engineers should confirm the manufacturer's exact measurement basis and operating conditions before using the tighter figure in a process tolerance calculation.\u003c\/p\u003e\n\n\u003cp\u003eFor a 30 slm full-scale model, ±1% FS corresponds to ±0.3 slm. The 2% FS lower control boundary corresponds to 0.6 slm. These values help determine whether the selected range can meet both the process minimum and maximum flow requirements.\u003c\/p\u003e\n\n\u003cp\u003eThe high pressure rating also requires careful interpretation. The 500 psi maximum operating pressure does not remove the need for adequate differential pressure across the controller. A system can have high inlet pressure and still fail to provide the differential pressure required for the requested flow.\u003c\/p\u003e\n\n\u003cp\u003eFinally, the 536,000-hour MTBF figure should be treated as a specified reliability value, not a guaranteed service life. Actual operating life depends on gas cleanliness, pressure cycling, valve duty, temperature, and maintenance conditions.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cb\u003eFREQUENTLY ASKED QUESTIONS\u003c\/b\u003e\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ1. What is the practical difference between fast start and soft start?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFast start prioritizes reaching a new flow target quickly. Soft start deliberately limits the rate of increase to reduce abrupt gas delivery changes. Select the mode according to chamber process requirements, downstream pressure sensitivity, and equipment sequencing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ2. Does the 500 psi pressure rating mean the controller can deliver its full rated flow at 500 psi?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Maximum operating pressure and available differential pressure are separate conditions. Actual flow capability depends on the pressure drop across the controller, gas properties, and selected full-scale configuration. Check the operating pressure curve for the intended gas and flow.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ3. How should I evaluate the 0.15% FS repeatability specification?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRepeatability describes how consistently the unit returns to the same flow under comparable conditions. It does not mean the absolute flow reading is accurate to 0.15%. For process validation, evaluate repeatability together with accuracy, linearity, and calibration uncertainty.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ4. What information is needed to confirm an analog replacement for an existing MFC?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eProvide the existing model, gas type, full-scale flow, analog signal range, connector pinout, fitting configuration, supply voltage, and valve fail position. A dimensional drawing and equipment wiring diagram are especially useful when the replacement must fit an existing gas panel.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ5. When should I request a new calibration or performance check?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eConsider verification after extended storage, gas-line contamination, major pressure changes, unexplained zero drift, or repeated process-flow deviations. For critical semiconductor processes, follow the equipment maintenance schedule and acceptance criteria rather than relying only on the annual zero-stability specification.\u003c\/p\u003e\n","brand":"UNIT Instruments","offers":[{"title":"Default Title","offer_id":68027823587510,"sku":"UFC-8100","price":103.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/UFC-8100.jpg?v=1794283299"},{"product_id":"ufc-7300-unit-instruments-7300-series-analog-mass-flow-controller","title":"UFC-7300 UNIT Instruments 7300 Series Analog Mass Flow Controller","description":"\u003ch3\u003e\u003cstrong\u003eUFC-7300 | UNIT Instruments | 7300 Series Analog Mass Flow Controller\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #1673b9;\"\u003e\u003cstrong\u003eUNIT Instruments UFC-7300\u003c\/strong\u003e\u003c\/span\u003e is an analog mass flow controller for precise gas delivery in industrial and semiconductor equipment. Its 7300 Series architecture combines proportional electromagnetic valve control, stainless steel gas-wetted components, and flexible electrical configurations.\u003c\/p\u003e\n\u003cp\u003eUnlike all-metal-sealed high-temperature controllers, this configuration uses a Viton elastomer O-ring and Kel-F valve seat. This design suits compatible non-corrosive process gases where conventional elastomer sealing provides a practical solution.\u003c\/p\u003e\n\u003cp\u003eThe UFC-7300 supports full-scale flow ranges from 5 sccm to 30 slm, based on nitrogen equivalence. Its analog interface offers voltage or current control, while selectable power configurations support different equipment architectures.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e01 | Product Architecture and Configuration Identity\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUNIT Instruments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #1673b9;\"\u003e\u003cstrong\u003eUFC-7300\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Series\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7300 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAnalog Mass Flow Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eControl Technology\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProportional electromagnetic control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve Assembly\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnit 132 valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve State\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNormally closed solenoid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSeal Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eViton elastomer O-ring and Kel-F seat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeating Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard unheated version\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003e02 | Flow Capacity and Control Performance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe family covers a broad flow range for different gas delivery requirements. The actual full-scale value depends on the ordered configuration and calibrated gas.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFull-Scale Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5 sccm to 30 slm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReference Gas\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eN2 equivalent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUFC-7300 Analog Accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±1% FS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRepeatability\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±0.15% FS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLinearity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±0.15% FS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTurndown Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eControl Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2–100% FS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFast-Start Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLess than 1 second\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZero Stability\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLess than 0.60% FS per year without auto-zero\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eImportant model distinction:\u003c\/strong\u003e The ±1% FS accuracy specification applies to the analog UFC-7300. The digital UFC-7301\/7304 models have different accuracy specifications. Do not transfer digital-model performance figures to this analog unit.\u003c\/p\u003e\n\u003cp\u003eThe listed fast-start response describes the initial response characteristic. Available linear ramp profiles provide additional control over flow transitions. Confirm the required ramp behavior with the actual controller configuration.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e03 | Environmental Compensation and Stability\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eProcess temperature and inlet pressure can influence mass flow measurement. The following coefficients help engineers evaluate expected measurement variation.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZero Temperature Coefficient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±0.05% FS\/°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpan Temperature Coefficient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±0.1% FS\/°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePressure Coefficient\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.007% of reading\/psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–50°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eFor applications with changing ambient conditions, include zero and span temperature effects in the measurement error budget. Pressure variation also requires attention, especially when the gas supply regulator cannot maintain a stable inlet condition.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e04 | Gas Path Materials and Sealing Strategy\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMain Wetted Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e316L stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpring Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e304 stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSurface Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32 micro-inch Ra\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eElastomer Seal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eViton O-ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eValve Seat\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eKel-F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHelium Leak Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 × 10⁻⁹ atm·cc\/sec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe material combination supports compatible general-purpose process gases. However, engineers must evaluate the complete wetted path rather than relying only on the stainless steel body specification.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eViton:\u003c\/strong\u003e Check compatibility with the actual gas, concentration, and operating temperature.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKel-F seat:\u003c\/strong\u003e Verify chemical compatibility and process cleanliness requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e316L stainless steel:\u003c\/strong\u003e Confirm suitability for the gas chemistry and moisture conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface finish:\u003c\/strong\u003e Consider the specified 32 micro-inch Ra when evaluating gas cleanliness requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis elastomer-sealed configuration should not automatically replace an all-metal-sealed controller in highly corrosive or contamination-sensitive services.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e05 | Pressure Envelope and Gas Supply Conditions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Inlet Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e500 psig\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProof Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1,500 psig\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eController Differential Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e7–40 psid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeter Differential Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLess than 4 torr (0.08 psid)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe pressure requirements differ between the controller and meter configurations. Maintain the specified differential pressure for the installed device. Never treat the proof pressure as a normal operating pressure.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e06 | Analog Interface and Power Selection\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe UFC-7300 supports multiple electrical configurations. Confirm the required control signal, supply arrangement, and connector before ordering a replacement.\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAnalog Signal Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–5 VDC or 4–20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDual-Rail Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±15 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSingle-Ended Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e11–33 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20-pin card edge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eController Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.5 W maximum at ±15 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlternative Controller Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.8 W maximum at 11–33 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeter Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.5–2 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eDo not assume that every UFC-7300 unit supports every signal and power combination. Confirm the nameplate, connector pinout, and original equipment configuration before wiring.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e07 | Mechanical Dimensions and Equipment Integration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e137.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e101.6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDepth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e37.6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFootprint Reference\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.5-inch footprint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.2 kg (2.65 lb), family-level specification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eUse the manufacturer's outline drawing to confirm mounting dimensions and connection orientation. Check the actual unit before modifying an existing gas panel.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e08 | Typical Equipment and Process Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSemiconductor gas delivery:\u003c\/strong\u003e Controls compatible process gases in semiconductor manufacturing equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCVD and PVD:\u003c\/strong\u003e Supports controlled gas delivery in deposition systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum systems:\u003c\/strong\u003e Provides flow regulation for compatible gas supply arrangements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiber optics:\u003c\/strong\u003e Supports gas delivery in fiber manufacturing equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedical equipment:\u003c\/strong\u003e Serves compatible gas-control applications with suitable material verification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCombustion systems:\u003c\/strong\u003e Regulates gas flow in process and combustion equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak testing and purging:\u003c\/strong\u003e Supports controlled gas supply during testing and purge sequences.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003e09 | Reliability and Compliance\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAnalog Model MTBF\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMore than 730,000 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDigital Family MTBF Reference\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.5 million hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEMC Design\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEMI\/RFI-shielded electronics\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompliance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCalibration Traceability\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNIST-traceable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe MTBF figures represent different family configurations. The digital-family figure does not describe the analog UFC-7300 itself. Confirm the applicable reliability documentation for the specific model.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e10 | Field Engineering: Installation and Maintenance Checks\u003c\/strong\u003e\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm gas compatibility.\u003c\/strong\u003e Check Viton, Kel-F, and stainless steel compatibility against the process gas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify the calibrated range.\u003c\/strong\u003e Match the controller's full-scale value to the equipment recipe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck the pressure drop.\u003c\/strong\u003e Maintain the specified differential pressure across the installed device.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentify the electrical version.\u003c\/strong\u003e Confirm 0–5 VDC or 4–20 mA operation before wiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVerify supply voltage.\u003c\/strong\u003e Identify the dual-rail or single-ended power configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspect the normally closed valve.\u003c\/strong\u003e Confirm the intended gas isolation behavior during power loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvaluate zero drift.\u003c\/strong\u003e Record zero output under consistent test conditions during scheduled maintenance.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eFor unstable flow, investigate inlet pressure, gas selection, electrical scaling, and valve behavior before changing controller calibration. This sequence helps isolate system-level faults from instrument-related issues.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e11 | Frequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: How can engineers distinguish a controller problem from an upstream regulator problem?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMonitor inlet pressure while the controller changes its setpoint. If inlet pressure fluctuates with demand, investigate regulator capacity, supply restrictions, and upstream line sizing. If inlet pressure remains stable, continue checking the control signal, valve response, and calibrated gas configuration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: Why might a controller show acceptable zero output but poor flow accuracy?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eZero stability and span accuracy describe different performance characteristics. A unit can maintain a stable zero while its flow measurement deviates under operating conditions. Check the reference gas, pressure drop, calibration range, and temperature effects before diagnosing a sensor fault.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: What should be considered when replacing a different MFC brand with this model?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCompare full-scale range, gas calibration, pressure drop, analog scaling, connector pinout, valve state, and wetted materials. Mechanical fit alone does not establish interchangeability. Confirm that the host controller can supply the required electrical power and interpret the selected signal type.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4: Can the UFC-7300 handle gases that require heated delivery lines?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe supplied configuration describes a standard unheated version. For gases that condense near ambient temperature, assess the complete thermal requirements before selecting this model. A heated gas line cannot compensate for an unheated internal flow path when the gas requires continuous temperature control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5: When should maintenance teams investigate elastomer seal degradation?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInvestigate seal condition when leakage, unstable zero, contamination, or unexpected gas behavior appears. Review gas exposure history and operating temperature. Do not select replacement elastomers by physical size alone; confirm the specified material and sealing design.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e12 | Ordering Information and Configuration Verification\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #1673b9;\"\u003e\u003cstrong\u003eUNIT Instruments UFC-7300\u003c\/strong\u003e\u003c\/span\u003e is an analog mass flow controller for compatible industrial and semiconductor gas systems. Its flexible electrical options and elastomer-sealed gas path support a wide range of equipment configurations.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e UNIT Instruments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e UFC-7300\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 7300 Series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Analog Mass Flow Controller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Range:\u003c\/strong\u003e 5 sccm to 30 slm, N2 equivalent\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Signal:\u003c\/strong\u003e 0–5 VDC or 4–20 mA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Options:\u003c\/strong\u003e ±15 VDC or 11–33 VDC, subject to configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal Type:\u003c\/strong\u003e Viton O-ring and Kel-F seat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhen requesting a quotation, provide the complete model number, full-scale flow range, gas type, signal format, supply voltage, and connector details. These specifications help verify compatibility with your existing gas delivery system.\u003c\/p\u003e","brand":"UNIT Instruments","offers":[{"title":"Default Title","offer_id":68027991720118,"sku":"UFC-7300","price":196.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/UFC-7300.jpg?v=1794288875"},{"product_id":"ufc-9660-high-temperature-analog-mfc-by-unit-instruments-9660-series","title":"UFC-9660 High-Temperature Analog MFC by UNIT Instruments 9660 Series","description":"\u003ch3\u003e\u003cstrong\u003eUFC-9660 | High-Temperature Metal-Seal Mass Flow Controller\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eUFC-9660\u003c\/strong\u003e from UNIT Instruments is a high-temperature analog mass flow controller in the 9660 Series. It is designed for semiconductor processes requiring heated gas delivery and stable flow regulation.\u003c\/p\u003e\n\u003cp\u003eIts heated construction supports operating temperatures up to 150°C. This design helps prevent condensation when handling process gases that may condense inside conventional gas delivery lines.\u003c\/p\u003e\n\u003cp\u003eThe controller combines a metal-sealed gas path, proportional electromagnetic solenoid valve, and remote electronics architecture. It uses a 0–5 VDC analog command and monitor interface.\u003c\/p\u003e\n\u003cp\u003eTypical applications include CVD, epitaxial deposition, and heated delivery systems for condensable source materials.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e01 | Thermal Control: Keeping Process Gas in the Required State\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eTemperature management is a key consideration when selecting the UFC-9660. Certain semiconductor precursor gases can condense when their temperature falls below the required process condition.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating temperature:\u003c\/strong\u003e 0–150°C (32–302°F), high-temperature model.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeated configuration:\u003c\/strong\u003e Heated enclosure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess suitability:\u003c\/strong\u003e Heated delivery of condensable gases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical processes:\u003c\/strong\u003e CVD, epitaxial deposition, and liquid or solid source vapor delivery.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor heated gas systems, the temperature profile must remain consistent across the source, delivery line, valve, and flow controller. A cold section can become a condensation point even when the controller itself is heated.\u003c\/p\u003e\n\u003cp\u003eDuring system design, verify the required temperature for the specific process gas. Also confirm the heating configuration and temperature limits of the installed remote electronics.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e02 | Metal-Seal Gas Path and Wetted Materials\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 9660 Series uses a metal-sealed construction for demanding semiconductor gas delivery applications. A W-seal configuration is specified for downported versions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWetted materials:\u003c\/strong\u003e 316L stainless steel, K-M45, 304 stainless steel, and 7Mo+.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSealing:\u003c\/strong\u003e Metal seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDownported configuration:\u003c\/strong\u003e W-seal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard surface finish:\u003c\/strong\u003e 10 micro-inch Ra.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional surface finish:\u003c\/strong\u003e 4 micro-inch Ra.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak integrity:\u003c\/strong\u003e 1 × 10\u003csup\u003e-10\u003c\/sup\u003e atm-cc\/sec He.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSurface finish and wetted material selection influence gas cleanliness and process compatibility. For sensitive precursor applications, verify the actual material combination and surface finish before ordering.\u003c\/p\u003e\n\u003cp\u003eThe listed leak integrity is a helium leak specification. It should not be interpreted as a guarantee of compatibility with every process gas or installation condition.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e03 | Pressure Envelope and Flow Regulation\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003ePressure capability must be evaluated alongside the required differential pressure. Maximum inlet pressure, proof pressure, and operating differential pressure describe different operating conditions.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum pressure:\u003c\/strong\u003e 3,500 kPa (500 psi).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProof pressure:\u003c\/strong\u003e 10,500 kPa (1,500 psi).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical differential pressure:\u003c\/strong\u003e 1.33–350 kPa (10 torr–50 psid).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl range:\u003c\/strong\u003e 2–100% of full scale.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure coefficient:\u003c\/strong\u003e 0.007% of reading per psi (N₂).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDo not use the proof pressure as a normal operating set point. Confirm the pressure limits of the complete gas delivery assembly, including fittings, regulators, valves, and downstream equipment.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e04 | Analog Control and Remote Electronics\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe UFC-9660 analog configuration uses a 0–5 VDC interface for setpoint and monitor signals. Its remote electronics arrangement separates the electronic module from the flow body.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSetpoint signal:\u003c\/strong\u003e 0–5 VDC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMonitor signal:\u003c\/strong\u003e 0–5 VDC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical connection:\u003c\/strong\u003e Card-edge connector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote electronics width:\u003c\/strong\u003e 1-1\/8 inches.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog family power:\u003c\/strong\u003e ±15 VDC.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eVerify the connector pin assignment and signal reference before integrating the controller with a process tool. The 0–5 VDC signal range alone does not establish connector or pinout compatibility.\u003c\/p\u003e\n\u003cp\u003eThe 9561 and 9565 digital variants use different electrical specifications. Their power requirements and digital performance figures should not be applied to this analog model.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e05 | Flow Performance and Dynamic Response\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe following performance values include both analog 9660 specifications and family-level data. Confirm the exact flow range and performance limits against the UFC-9660 configuration supplied.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFamily-level flow range:\u003c\/strong\u003e 10 sccm–30 slm, N₂ equivalent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog 9660 accuracy:\u003c\/strong\u003e ±1% FS.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFamily-level repeatability:\u003c\/strong\u003e ±0.15% FS.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFamily-level linearity:\u003c\/strong\u003e ±0.5% FS.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFamily-level zero stability:\u003c\/strong\u003e Less than 0.6% FS per year.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl range:\u003c\/strong\u003e 2–100% FS.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast-start response:\u003c\/strong\u003e Less than 2 seconds, per SEMI E17-91.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft-start rate:\u003c\/strong\u003e Linear ramp at 20% per second.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAccuracy expressed as a percentage of full scale differs from accuracy expressed as a percentage of setpoint. This distinction is important when evaluating low-flow operation.\u003c\/p\u003e\n\u003cp\u003eThe digital 9561\/9565 accuracy figures are separate specifications. They are not interchangeable with the analog 9660 accuracy rating.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e06 | Mechanical Configuration and Mounting\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe UFC-9660 uses a remote electronics design. Flow body dimensions depend on the selected mounting and port configuration.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemote electronics dimensions:\u003c\/strong\u003e 3.50 × 4.00 × 1.47 inches (89 × 102 × 37 mm).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDownported flow body overall length:\u003c\/strong\u003e 105.2 mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.2 kg (2.65 lb).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting configurations:\u003c\/strong\u003e Horizontal mounting, including HOV\/HOS configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eCheck the port orientation and mounting arrangement against the existing process tool. The overall length listed above applies to the downported C\/W configuration, not necessarily every flow body option.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e07 | Semiconductor Process Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe high-temperature architecture is intended for gas delivery systems where temperature control is part of process reliability.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCVD:\u003c\/strong\u003e Heated delivery of compatible precursor gases to deposition chambers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEpitaxial deposition:\u003c\/strong\u003e Flow regulation in heated process gas systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondensable gas delivery:\u003c\/strong\u003e Maintaining gas temperature to reduce condensation risk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiquid source vapor delivery:\u003c\/strong\u003e Supporting heated delivery systems for vaporized source materials.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid source vapor delivery:\u003c\/strong\u003e Regulating compatible gases in heated source delivery arrangements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGas compatibility, material selection, and operating temperature must be confirmed for each process. The UFC-9660 should be selected according to the actual gas composition and tool configuration.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e08 | Technical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eUFC-9660\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eUNIT Instruments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003e9660 Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eHigh-temperature metal-seal analog MFC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow range\u003c\/td\u003e\n\u003ctd\u003e10 sccm–30 slm, N₂ equivalent (family-level)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e±1% FS (analog 9660)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRepeatability\u003c\/td\u003e\n\u003ctd\u003e±0.15% FS (family-level)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLinearity\u003c\/td\u003e\n\u003ctd\u003e±0.5% FS (family-level)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eZero stability\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.6% FS\/year (family-level)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResponse\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;2 seconds fast start, per SEMI E17-91\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoft start\u003c\/td\u003e\n\u003ctd\u003e20% per second linear ramp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl range\u003c\/td\u003e\n\u003ctd\u003e2–100% FS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e0–150°C (32–302°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature coefficient, zero\u003c\/td\u003e\n\u003ctd\u003e0.05% FS\/°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature coefficient, span\u003c\/td\u003e\n\u003ctd\u003e0.1% FS\/°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePressure coefficient\u003c\/td\u003e\n\u003ctd\u003e0.007% reading\/psi (N₂)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum pressure\u003c\/td\u003e\n\u003ctd\u003e3,500 kPa (500 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProof pressure\u003c\/td\u003e\n\u003ctd\u003e10,500 kPa (1,500 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDifferential pressure\u003c\/td\u003e\n\u003ctd\u003e1.33–350 kPa (10 torr–50 psid typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWetted materials\u003c\/td\u003e\n\u003ctd\u003e316L SS \/ K-M45 \/ 304 \/ 7Mo+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface finish\u003c\/td\u003e\n\u003ctd\u003e10 micro-inch Ra standard; 4 micro-inch optional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeal type\u003c\/td\u003e\n\u003ctd\u003eMetal seal; W-seal for downported version\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical interface\u003c\/td\u003e\n\u003ctd\u003e0–5 VDC setpoint and monitor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eCard-edge connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectronics\u003c\/td\u003e\n\u003ctd\u003eRemote electronics, 1-1\/8 inches wide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply\u003c\/td\u003e\n\u003ctd\u003e±15 VDC (analog family)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow body length\u003c\/td\u003e\n\u003ctd\u003e105.2 mm overall, downported C\/W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote electronics dimensions\u003c\/td\u003e\n\u003ctd\u003e89 × 102 × 37 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.2 kg (2.65 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\u003ctd\u003eCE; NIST-traceable; SEMI E12\/E16\/E17\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003e09 | Field Engineering FAQ\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ1: Why can a heated MFC still experience unstable flow when the gas source temperature is correct?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA correct source temperature does not guarantee a uniform temperature throughout the delivery path. Check for cold spots around fittings, valves, adapters, and chamber connections. Review temperature sensor locations and insulation. Confirm that the controller and connecting lines reach their required operating temperatures before evaluating flow stability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ2: What should engineers investigate when a process chamber shows deposition variation despite a stable analog command?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCheck actual gas delivery conditions rather than relying only on the command signal. Review upstream pressure fluctuations, downstream backpressure, gas temperature, and calibration gas settings. Also compare the monitor signal with an independent process measurement where available. A stable command does not prove that the delivered mass flow remains constant.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ3: Can the UFC-9660 be mounted in the same orientation as an existing standard-temperature MFC?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNot without checking the mechanical configuration. Confirm whether the replacement uses HOV or HOS mounting, and verify the port direction and flow body dimensions. Downported and other port arrangements may have different mechanical requirements. Check the equipment drawing before modifying the gas panel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ4: What commissioning sequence helps reduce problems after replacing a high-temperature controller?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFirst, verify the gas path and electrical connections. Perform the required leak test before introducing process gas. Bring the heated assembly to its specified operating temperature, then establish the required pressure differential. Check zero, analog scaling, and several stable flow points. Follow the equipment manufacturer's approved startup and purge procedures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ5: What information is needed to identify the correct UFC-9660 replacement configuration?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eProvide the complete nameplate information, full-scale flow range, process gas, port orientation, mounting arrangement, and electrical connector details. Include the required operating temperature and pressure conditions. For condensable gases, identify the source and delivery temperature requirements. These details help prevent a mechanically similar but functionally unsuitable replacement.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003e10 | Configuration Verification Before Ordering\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe 9660 Series includes different configurations and related digital models. Specifications can vary by electronics type, flow range, port arrangement, and temperature option.\u003c\/p\u003e\n\u003cp\u003eBefore ordering, confirm the following details:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExact model: UFC-9660.\u003c\/li\u003e\n\u003cli\u003eAnalog electronics configuration.\u003c\/li\u003e\n\u003cli\u003eRequired N₂-equivalent full-scale flow range.\u003c\/li\u003e\n\u003cli\u003eGas type and calibration requirements.\u003c\/li\u003e\n\u003cli\u003eHeated operating temperature.\u003c\/li\u003e\n\u003cli\u003eMetal seal and port configuration.\u003c\/li\u003e\n\u003cli\u003eHorizontal mounting arrangement, including HOV\/HOS where applicable.\u003c\/li\u003e\n\u003cli\u003eCard-edge connector and electrical requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDo not use the digital 9561\/9565 specifications or the 9500 remote-electronics flow range as substitutes for UFC-9660 configuration data.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"UNIT Instruments","offers":[{"title":"Default Title","offer_id":68027996864694,"sku":"UFC-9660","price":163.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/UFC-8161_2.jpg?v=1794289029"}],"url":"https:\/\/www.plcsparehub.com\/collections\/unit-instruments.oembed","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}