{"product_id":"std720-e1hs4as-1-0-chc-11c-b-20a0-f1-0000-honeywell-pressure-transmitter","title":"STD720-E1HS4AS-1-0-CHC-11C-B-20A0-F1-0000 Honeywell Pressure Transmitter","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eSTD720-E1HS4AS-1-0-CHC-11C-B-20A0-F1-0000 Honeywell\u003c\/strong\u003e\u003c\/span\u003e Differential Pressure Transmitter is a high-performance smart field instrument belonging to the SmartLine STD700 series. Designed for accurate flow, level, and differential pressure measurements in severe processing environments, this unit features a Tantalum diaphragm with 316 Stainless Steel process heads to handle aggressive fluids. It generates a stable 4-20mA analog output with digital HART communication, making it ideal for integration into advanced control architectures.\u003c\/p\u003e\n\u003ch3\u003eConfiguration Architecture Breakdown\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eHoneywell SmartLine STD700 Series\u003c\/strong\u003e\u003c\/span\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Range [STD720]:\u003c\/strong\u003e Span up to 400 inH2O (1000 mbar) \/ Min Span 4.0 inH2O (10 mbar)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead \u0026amp; Diaphragm Material [H]:\u003c\/strong\u003e 316 Stainless Steel Process Heads with Tantalum Diaphragms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFill Fluid [1]:\u003c\/strong\u003e Silicone Oil 200\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProcess Connection [H]:\u003c\/strong\u003e 1\/2\" NPT Female Matched to Head Material\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt \u0026amp; Nut Hardware [C]:\u003c\/strong\u003e Carbon Steel Flange Bolts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVent\/Drain Configuration [4]:\u003c\/strong\u003e Dual-Ended Dual Vent, End Location, Matched Material\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGasket Material [A]:\u003c\/strong\u003e Glass-Filled PTFE (Teflon)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatic Pressure Rating [S]:\u003c\/strong\u003e Standard High Static Pressure up to 4500 psig (315 bar)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Orientation [1]:\u003c\/strong\u003e Standard Configuration (High Side Left, Low Side Right)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAgency Approvals [A]:\u003c\/strong\u003e FM Explosion-Proof, Intrinsically Safe, Non-Incendive, \u0026amp; Dustproof\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectronics Housing [A]:\u003c\/strong\u003e Polyester Powder Coated Aluminum (1\/2\" NPT Conduit Entries)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput \u0026amp; Protocol [H]:\u003c\/strong\u003e 4-20mA DC Output with HART Digital Communications Protocol\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoftware \u0026amp; Fail-Safe [1]:\u003c\/strong\u003e Advanced Diagnostics Enabled, High Fail Mode (\u0026gt;21.0 mA)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Hardware [1]:\u003c\/strong\u003e Carbon Steel Angle Mounting Bracket Included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications \u0026amp; Operational Matrix\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eEngineering Parameter\u003c\/th\u003e\n\u003cth\u003eField Specification Detail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eManufacturer Name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eHoneywell\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFull Order Model Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eSTD720-E1HS4AS-1-0-CHC-11C-B-20A0-F1-0000\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\u003e\u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eHoneywell SmartLine STD700 Series\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransmitter Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSmart Differential Pressure Transmitter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUpper Range Limit (URL)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e400 inH2O (1000 mbar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLower Range Limit (LRL)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-400 inH2O (-1000 mbar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum Span\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.0 inH2O (10 mbar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTurndown Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100:1 Dynamic Measurement Range Capability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Working Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4500 psig (315 bar) High Static Line Rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Signal Protocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-20mA DC Analog Signal with HART Communication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing Protection \u0026amp; Weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePowder-Coated Aluminum (Net Weight 8.3 lbs \/ 3.8 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFail-Safe State\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh Alarm Status Output (\u0026gt; 21.0 mA DC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard Operating Temp\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +85°C (-40°F to +185°F) Ambient Electronics Range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatible Hardware \u0026amp; Process Application Scenarios\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Field System Hardware:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eHoneywell Experion PKS, TDC3000, and Safety Manager DCS platforms.\u003c\/li\u003e\n\u003cli\u003eThird-party PLCs and flow computers supporting 4-20mA HART point-to-point connections.\u003c\/li\u003e\n\u003cli\u003eOrifice plates, Venturi tubes, and averaging Pitot primary flow elements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTarget Process Applications:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eCorrosive liquid and gas differential pressure measurement requiring Tantalum diaphragm protection.\u003c\/li\u003e\n\u003cli\u003eBoiler drum water level monitoring and pressurized vessel hydrostatic level calculation.\u003c\/li\u003e\n\u003cli\u003eHigh line-pressure natural gas metering stations up to 4500 psig static pressure limits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eDiagnostic \u0026amp; Predictive Monitoring Capabilities\u003c\/h3\u003e\n\u003cp\u003eThe internal micro-controller onboard the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eSTD720-E1HS4AS-1-0-CHC-11C-B-20A0-F1-0000 Honeywell\u003c\/strong\u003e\u003c\/span\u003e transmitter continuously executes embedded self-diagnostics. The firmware constantly monitors piezoresistive sensor bridge health, internal temperature variations, loop supply voltage integrity, and EEPROM checksum stability. If a sensor diaphragm over-pressure shift or electrical open-circuit condition is detected, the transmitter immediately forces the output current to a dedicated high alarm state (\u0026gt;21.0mA), broadcasting precise diagnostic fault codes via HART to alert maintenance teams before process shutdown occurs.\u003c\/p\u003e\n\u003ch3\u003eGlobal PLC Spare HUB's Insight\u003c\/h3\u003e\n\u003cp\u003eIn chemical processing installations handling aggressive media, standard 316L diaphragms often suffer from pitting or hydrogen embrittlement over prolonged exposure. When commissioning the \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eSTD720-E1HS4AS-1-0-CHC-11C-B-20A0-F1-0000\u003c\/strong\u003e\u003c\/span\u003e, selecting the Tantalum diaphragm option provides superior chemical resistance against harsh acids and chlorine compounds. On a recent retrofitting project for an industrial acid recovery skid, replacing degraded standard transmitters with this Tantalum-wetted \u003cspan style=\"color: #0056b3;\"\u003e\u003cstrong\u003eHoneywell SmartLine\u003c\/strong\u003e\u003c\/span\u003e unit completely stopped baseline calibration drift, extending instrument maintenance intervals from 3 months to over 18 months.\u003c\/p\u003e\n\u003ch3\u003eWarranty, Logistics \u0026amp; Shipping Terms\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Condition:\u003c\/strong\u003e 100% Factory New and Original Equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Warranty:\u003c\/strong\u003e Comprehensive 12-Month Guarantee from shipment date\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDispatch Window:\u003c\/strong\u003e Fast order handling, shipping within 24 to 48 hours post-payment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal Express Delivery:\u003c\/strong\u003e World-class shipping services via FedEx, UPS, and DHL Express\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eEngineering Selection \u0026amp; Application FAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the main benefit of specifying Tantalum diaphragms instead of standard 316L SS?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTantalum exhibits exceptionally high corrosion resistance against strong acids, chlorine solutions, and aggressive chemicals where standard 316L stainless steel would experience rapid chemical attack or pinhole leakage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow does static line pressure affect differential pressure measurement on this unit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe STD720 features high static pressure compensation rated up to 4500 psig (315 bar). Internal processing algorithms correct for static pressure effects to ensure stable differential readings across high-pressure gas pipelines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I reconfigure the zero and span points without built-in local display pushbuttons?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. Because this model features option '0' (No external display or buttons), zero and span calibrations are easily performed using any standard handheld HART field communicator or asset management software via the loop terminals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat happens when the transmitter encounters an internal sensor failure?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWith option '1' software configuration, the transmitter drives the output signal to a High Fail mode exceeding 21.0 mA, giving control room alarms clear, immediate indication of an instrument fault state.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this transmitter come pre-assembled with a mounting bracket?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The unit includes a carbon steel angle mounting bracket (Option 1) suitable for 2-inch pipe stand or flat wall mounting installations in industrial environments.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":45384085504182,"sku":"STD720-E1HS4AS-1-0-CHC-11C-B-20A0-F1-0000","price":136.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/7863\/8774\/files\/STD720-E1HS4AS-1-A-AH0-11S-B-10A0-F1-0000.jpg?v=1787723892","url":"https:\/\/www.plcsparehub.com\/ar\/products\/std720-e1hs4as-1-0-chc-11c-b-20a0-f1-0000-honeywell-pressure-transmitter","provider":"Global PLC Spare Hub","version":"1.0","type":"link"}