{"product_id":"new-1pcs-inficon-vacuometer-sensor-tpr281-igg21950","title":"INFICON Vacuometer Sensor TPR281 IGG21950","description":"\u003cdiv class=\"koeed-container\" style=\"width:100%;color:#333;line-height:1.7;\"\u003e\n\n  \u003cstyle\u003e\n    .koeed-container h2,\n    .koeed-container h3{\n      color:#16c8c8;\n      margin-top:32px;\n    }\n\n    .koeed-container table{\n      width:100%;\n      border-collapse:collapse;\n    }\n\n    .koeed-container th,\n    .koeed-container td{\n      border:1px solid #eeeeee;\n      padding:10px;\n      text-align:left;\n      vertical-align:top;\n    }\n\n    .koeed-container tr:nth-child(odd){\n      background:#f4fcfc;\n    }\n\n    .koeed-container tr:nth-child(even){\n      background:#fafafa;\n    }\n\n    .koeed-highlight{\n      color:#16c8c8;\n      font-weight:bold;\n    }\n\n    .koeed-tool-box{\n      border:1px solid #d9f3f3;\n      background:#f8ffff;\n      padding:20px;\n      border-radius:8px;\n      margin-top:20px;\n    }\n\n    .koeed-tool-output{\n      margin-top:15px;\n      padding:12px;\n      background:#ffffff;\n      border:1px solid #d9f3f3;\n    }\n\n    .koeed-input{\n      width:100%;\n      padding:10px;\n      border:1px solid #cccccc;\n      margin-top:10px;\n      box-sizing:border-box;\n    }\n\n    .koeed-btn{\n      margin-top:15px;\n      background:#16c8c8;\n      color:#fff;\n      border:none;\n      padding:10px 18px;\n      cursor:pointer;\n    }\n  \u003c\/style\u003e\n\n  \u003ch2\u003eEngineer's Quick Brief\u003c\/h2\u003e\n\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eINFICON \/ Pfeiffer TPR281 IGG21950\u003c\/strong\u003e is a compact \u003cstrong\u003ePirani vacuum gauge sensor\u003c\/strong\u003e designed for fine and rough vacuum monitoring from \u003cstrong\u003e5×10⁻⁴ to 1000 hPa\u003c\/strong\u003e.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eNickel filament construction\u003c\/strong\u003e improves resistance against corrosive gases, making the gauge suitable for semiconductor, coating, and vacuum furnace applications.\u003c\/li\u003e\n\n    \u003cli\u003eThe sensor provides \u003cstrong\u003efast 80 ms response time\u003c\/strong\u003e, logarithmic analog output, and compatibility with standard \u003cstrong\u003eDN16 ISO-KF vacuum systems\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eSEO Introduction\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The \u003cstrong\u003eINFICON TPR281 IGG21950\u003c\/strong\u003e compact Pirani vacuometer sensor is an industrial vacuum measurement device optimized for \u003cstrong\u003erough vacuum\u003c\/strong\u003e and \u003cstrong\u003eforeline pressure monitoring\u003c\/strong\u003e. \n    Built with a rugged stainless-steel measuring cell and nickel filament technology, the TPR281 is engineered for applications involving \u003cstrong\u003ecorrosive process gases\u003c\/strong\u003e, semiconductor vacuum systems, coating equipment, leak detection systems, and vacuum furnaces.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    This active Pirani gauge supports a wide pressure range from \u003cstrong\u003e5×10⁻⁴ hPa to 1000 hPa\u003c\/strong\u003e, offering fast response, stable analog output, and reliable integration with vacuum controllers and PLC-based monitoring systems.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n  \u003cdiv style=\"overflow-x:auto;\"\u003e\n    \u003ctable\u003e\n      \u003ctr\u003e\n        \u003cth\u003eParameter\u003c\/th\u003e\n        \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eModel\u003c\/td\u003e\n        \u003ctd\u003eINFICON \/ Pfeiffer TPR281 IGG21950\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMeasurement Principle\u003c\/td\u003e\n        \u003ctd\u003ePirani Thermal Conductivity Gauge\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMeasurement Range\u003c\/td\u003e\n        \u003ctd\u003e5 × 10⁻⁴ to 1000 hPa\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eFilament Material\u003c\/td\u003e\n        \u003ctd\u003eNickel\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eApplication Type\u003c\/td\u003e\n        \u003ctd\u003eCorrosive Media Compatible\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eFlange Connection\u003c\/td\u003e\n        \u003ctd\u003eDN16 ISO-KF\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eOutput Signal\u003c\/td\u003e\n        \u003ctd\u003e2.2 – 8.5 V Analog Logarithmic Output\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eInput Voltage\u003c\/td\u003e\n        \u003ctd\u003e14 – 30 VDC\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003ePower Consumption\u003c\/td\u003e\n        \u003ctd\u003e1 W Maximum\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eResolution\u003c\/td\u003e\n        \u003ctd\u003e1% of Reading\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eRepeatability\u003c\/td\u003e\n        \u003ctd\u003e±2% (1×10⁻³ to 100 hPa)\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eTypical Accuracy\u003c\/td\u003e\n        \u003ctd\u003e±15% (1×10⁻³ to 100 hPa)\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eResponse Time\u003c\/td\u003e\n        \u003ctd\u003e80 ms\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMaximum Pressure\u003c\/td\u003e\n        \u003ctd\u003e10000 hPa\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eBakeout Temperature\u003c\/td\u003e\n        \u003ctd\u003e80°C\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eHousing Material\u003c\/td\u003e\n        \u003ctd\u003eStainless Steel\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eProtection Rating\u003c\/td\u003e\n        \u003ctd\u003eIP40\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eWeight\u003c\/td\u003e\n        \u003ctd\u003e80 g\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eMounting Orientation\u003c\/td\u003e\n        \u003ctd\u003eAny Orientation\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eFeedthrough\u003c\/td\u003e\n        \u003ctd\u003eGlass-to-Metal\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eVacuum Interface\u003c\/td\u003e\n        \u003ctd\u003eMetal-Sealed Sensor Cell\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eApplication Matrix\u003c\/h2\u003e\n\n  \u003cdiv style=\"overflow-x:auto;\"\u003e\n    \u003ctable\u003e\n      \u003ctr\u003e\n        \u003cth\u003eIndustry\u003c\/th\u003e\n        \u003cth\u003eTypical Use\u003c\/th\u003e\n        \u003cth\u003eEngineering Value\u003c\/th\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eSemiconductor Equipment\u003c\/td\u003e\n        \u003ctd\u003eForeline Vacuum Monitoring\u003c\/td\u003e\n        \u003ctd\u003eStable pressure feedback during wafer processing\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eVacuum Coating Systems\u003c\/td\u003e\n        \u003ctd\u003eChamber Rough Vacuum Measurement\u003c\/td\u003e\n        \u003ctd\u003eImproves pump-down process consistency\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eLeak Detection Systems\u003c\/td\u003e\n        \u003ctd\u003eVacuum Reference Monitoring\u003c\/td\u003e\n        \u003ctd\u003eFast pressure stabilization response\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eVacuum Furnaces\u003c\/td\u003e\n        \u003ctd\u003eLow Vacuum Pressure Supervision\u003c\/td\u003e\n        \u003ctd\u003eSupports thermal process repeatability\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eResearch Laboratories\u003c\/td\u003e\n        \u003ctd\u003eGeneral Vacuum Instrumentation\u003c\/td\u003e\n        \u003ctd\u003eCompact installation and easy PLC integration\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eKoeed B2B Tool — Vacuum Pressure Estimator\u003c\/h2\u003e\n\n  \u003cdiv class=\"koeed-tool-box\"\u003e\n\n    \u003cp\u003e\n      This engineering calculator estimates approximate vacuum pressure from the analog output voltage of the \u003cstrong\u003eTPR281 Pirani gauge\u003c\/strong\u003e.\n    \u003c\/p\u003e\n\n    \u003clabel\u003e\u003cstrong\u003eAnalog Output Voltage (V)\u003c\/strong\u003e\u003c\/label\u003e\n\n    \u003cinput type=\"number\" id=\"koeed-voltage-input\" class=\"koeed-input\" min=\"2.2\" max=\"8.5\" step=\"0.1\" placeholder=\"Enter voltage between 2.2V and 8.5V\"\u003e\n\n    \u003cbutton class=\"koeed-btn\" onclick=\"koeedCalculateVacuumPressure()\"\u003e\n      Calculate Pressure\n    \u003c\/button\u003e\n\n    \u003cdiv class=\"koeed-tool-output\" id=\"koeed-pressure-output\"\u003e\n      Estimated pressure will appear here.\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003cnoscript\u003e\n    JavaScript is required for the TPR281 vacuum pressure estimation tool.\n  \u003c\/noscript\u003e\n\n  \u003cscript\u003e\n    function koeedCalculateVacuumPressure(){\n\n      var voltage = parseFloat(document.getElementById('koeed-voltage-input').value);\n\n      if(isNaN(voltage)){\n        document.getElementById('koeed-pressure-output').innerHTML =\n          'Please enter a valid analog output voltage.';\n        return;\n      }\n\n      if(voltage \u003c 2.2 || voltage \u003e 8.5){\n        document.getElementById('koeed-pressure-output').innerHTML =\n          'Valid TPR281 analog output range is 2.2V to 8.5V.';\n        return;\n      }\n\n      var logPressure = ((voltage - 2.2) \/ (8.5 - 2.2)) * (3 - (-4));\n\n      var pressure = Math.pow(10, logPressure - 4);\n\n      var scientific = pressure.toExponential(3);\n\n      document.getElementById('koeed-pressure-output').innerHTML =\n        '\u003cstrong\u003eEstimated Vacuum Pressure:\u003c\/strong\u003e ' + scientific + ' hPa';\n    }\n  \u003c\/script\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n  \u003ch3\u003eWhy does the TPR281 show unstable readings?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    Unstable readings may occur due to contamination on the Pirani filament, excessive vibration, incorrect grounding, or sudden gas composition changes inside the vacuum chamber.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eCan the TPR281 be used with corrosive gases?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    Yes. The nickel filament version is specifically designed for applications involving mildly corrosive process gases compared with standard tungsten filament Pirani gauges.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhat is the recommended supply voltage?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    The active gauge requires a regulated \u003cstrong\u003e14–30 VDC\u003c\/strong\u003e power supply.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eCan the gauge be mounted in any orientation?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    Yes. The compact sensor can operate in multiple mounting orientations without significant performance degradation.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhat vacuum range is ideal for the TPR281?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    The gauge is optimized for rough and fine vacuum measurement between \u003cstrong\u003e5×10⁻⁴ and 1000 hPa\u003c\/strong\u003e.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eCross-Reference Guide\u003c\/h2\u003e\n\n  \u003cdiv style=\"overflow-x:auto;\"\u003e\n    \u003ctable\u003e\n      \u003ctr\u003e\n        \u003cth\u003eRelated Model\u003c\/th\u003e\n        \u003cth\u003eDescription\u003c\/th\u003e\n        \u003cth\u003eMain Difference\u003c\/th\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eTPR280\u003c\/td\u003e\n        \u003ctd\u003eStandard Pirani Gauge\u003c\/td\u003e\n        \u003ctd\u003eUses tungsten filament instead of nickel\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003eTPR270\u003c\/td\u003e\n        \u003ctd\u003eCompact Pirani Variant\u003c\/td\u003e\n        \u003ctd\u003eDifferent flange and process compatibility\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003ePPG550\u003c\/td\u003e\n        \u003ctd\u003ePirani + Piezo Combination Gauge\u003c\/td\u003e\n        \u003ctd\u003eExtended atmospheric pressure accuracy\u003c\/td\u003e\n      \u003c\/tr\u003e\n\n      \u003ctr\u003e\n        \u003ctd\u003ePGE050\u003c\/td\u003e\n        \u003ctd\u003ePassive Convection Pirani Gauge\u003c\/td\u003e\n        \u003ctd\u003eRequires dedicated controller unit\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cscript type=\"application\/ld+json\"\u003e\n  {\n    \"@context\":\"https:\/\/schema.org\",\n    \"@type\":\"FAQPage\",\n    \"mainEntity\":[\n      {\n        \"@type\":\"Question\",\n        \"name\":\"Why does the TPR281 show unstable readings?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Unstable readings may occur due to contamination on the Pirani filament, excessive vibration, incorrect grounding, or sudden gas composition changes.\"\n        }\n      },\n      {\n        \"@type\":\"Question\",\n        \"name\":\"Can the TPR281 be used with corrosive gases?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Yes. The nickel filament version is designed for corrosive process gas compatibility.\"\n        }\n      },\n      {\n        \"@type\":\"Question\",\n        \"name\":\"What supply voltage does the TPR281 require?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"The gauge requires a regulated 14–30 VDC power supply.\"\n        }\n      },\n      {\n        \"@type\":\"Question\",\n        \"name\":\"Can the TPR281 be mounted in any orientation?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Yes. The sensor supports flexible installation orientations.\"\n        }\n      },\n      {\n        \"@type\":\"Question\",\n        \"name\":\"What vacuum range is supported by the TPR281?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"The gauge supports vacuum measurement from 5×10⁻⁴ to 1000 hPa.\"\n        }\n      }\n    ]\n  }\n  \u003c\/script\u003e\n\n  \u003cscript type=\"application\/ld+json\"\u003e\n  {\n    \"@context\":\"https:\/\/schema.org\",\n    \"@type\":\"WebApplication\",\n    \"name\":\"TPR281 Vacuum Pressure Estimator\",\n    \"applicationCategory\":\"EngineeringApplication\",\n    \"operatingSystem\":\"Any\",\n    \"description\":\"Front-end engineering calculator for estimating vacuum pressure from TPR281 analog output voltage.\"\n  }\n  \u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"INFICON","offers":[{"title":"Default Title","offer_id":44476641738937,"sku":"235635241917","price":1478.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/8476\/7929\/files\/new_1pcs_INFICON_Vacuometer_Sensor_TPR281_IGG21950___INFICON__1.webp?v=1779638913","url":"https:\/\/koeed.com\/products\/new-1pcs-inficon-vacuometer-sensor-tpr281-igg21950","provider":"KOEED","version":"1.0","type":"link"}