{"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","url":"https:\/\/www.plcsparehub.com\/products\/ufc-1660-unit-instruments-1660-series-precision-analog-mfc","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}