{"product_id":"c437e1038-honeywell-gasair-pressure-limit-switch-12-5-12-in-water-column","title":"C437E1038 | Honeywell Gas\/Air Pressure Limit Switch, 1\/2–5-1\/2 in. Water Column","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"144\" data-end=\"396\"\u003eThe Honeywell C437E1038 is a gas\/air pressure limit switch with an adjustable range from 1\/2 to 5-1\/2 inches water column. It provides reliable pressure monitoring and control for heating systems, offering both durability and ease of adjustment.\u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 100%; height: 351.688px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003ePressure Control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003eC437E1038\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003eGas\/Air Pressure Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003ePressure Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003e1\/2–5-1\/2 in. water column\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eSwitching Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003eSPST\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003e32°F to 125°F (0°C to 52°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eSurge Compensation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003eYes, restrictive orifice\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eDiaphragm Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003eBuna-N fiber-reinforced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eCover Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003eClear glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eVisual Indication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003eMercury switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eMain Pressure Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003e1\/2 in. NPT female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 39.1875px;\"\u003e\u003cstrong\u003eVent\/Low Pressure Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 39.1875px;\"\u003e1\/8 in. NPT female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 19.5938px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 19.5938px;\"\u003eGas and air pressure monitoring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 18.5938px;\"\u003e\n\u003ctd style=\"width: 35.2727%; height: 18.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.3636%; height: 18.5938px;\"\u003e\u003cspan\u003e4.27 lbs\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003ch4\u003eInformation About \u003cspan data-sheets-root=\"1\"\u003eC437E1038\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp data-end=\"1080\" data-start=\"427\"\u003eThe C437E1038 is part of Honeywell’s pressure switch line, designed for gas and air pressure sensing in heating and combustion systems. Suitable for SPST switching, it features a restrictive orifice to help compensate for momentary pressure surges, ensuring stable operation. The enclosed setting design prevents tampering and offers dust resistance, while the clear glass cover allows visual inspection of the internal mechanism during setup and maintenance. Its reinforced Buna-N fiber diaphragm increases durability, and the mercury switch provides a clear visual indication of switch position for quick status verification.\u003c\/p\u003e\n\u003cp data-end=\"198\" data-start=\"179\"\u003e\u003cstrong data-end=\"196\" data-start=\"179\"\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1665\" data-start=\"199\"\u003e\n\u003cli data-end=\"403\" data-start=\"199\"\u003e\n\u003cp data-end=\"403\" data-start=\"201\"\u003e\u003cstrong data-end=\"239\" data-start=\"201\"\u003eAdjustable pressure sensing range:\u003c\/strong\u003e Provides precise monitoring and control over pressures from 1\/2 to 5-1\/2 inches water column, allowing fine-tuning for different gas and air system requirements.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"565\" data-start=\"404\"\u003e\n\u003cp data-end=\"565\" data-start=\"406\"\u003e\u003cstrong data-end=\"446\" data-start=\"406\"\u003eSingle-pole, single-throw switching:\u003c\/strong\u003e Designed for SPST operation, enabling straightforward integration into heating or combustion system safety circuits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"769\" data-start=\"566\"\u003e\n\u003cp data-end=\"769\" data-start=\"568\"\u003e\u003cstrong data-end=\"602\" data-start=\"568\"\u003eIntegrated surge compensation:\u003c\/strong\u003e Uses a restrictive orifice in the inlet pressure channel to dampen momentary spikes in gas pressure, maintaining consistent performance and avoiding nuisance trips.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"953\" data-start=\"770\"\u003e\n\u003cp data-end=\"953\" data-start=\"772\"\u003e\u003cstrong data-end=\"819\" data-start=\"772\"\u003eManual reset capability for lockout models:\u003c\/strong\u003e Offers enhanced safety by requiring a manual reset after a lockout event, ensuring that faults are addressed before system restart.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1129\" data-start=\"954\"\u003e\n\u003cp data-end=\"1129\" data-start=\"956\"\u003e\u003cstrong data-end=\"991\" data-start=\"956\"\u003eProtected adjustment mechanism:\u003c\/strong\u003e Enclosed setting design prevents unauthorized tampering and shields components from dust and debris, improving operational reliability.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1322\" data-start=\"1130\"\u003e\n\u003cp data-end=\"1322\" data-start=\"1132\"\u003e\u003cstrong data-end=\"1173\" data-start=\"1132\"\u003eHigh-strength diaphragm construction:\u003c\/strong\u003e Buna-N fiber-reinforced diaphragm material provides superior resistance to wear, pressure cycling, and environmental stress for long service life.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1496\" data-start=\"1323\"\u003e\n\u003cp data-end=\"1496\" data-start=\"1325\"\u003e\u003cstrong data-end=\"1358\" data-start=\"1325\"\u003eVisual inspection capability:\u003c\/strong\u003e Clear glass cover allows operators to observe the interior mechanism during setup, adjustment, and troubleshooting without disassembly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-end=\"2120\" data-start=\"1985\"\u003eThe C437E1038 delivers the reliability, safety, and precision required for effective gas and air pressure control in heating systems.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":49105246257408,"sku":"C437E1038","price":1045.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/wmremove-transformed_8.jpg?v=1785543439","url":"https:\/\/alotechparts.com\/products\/c437e1038-honeywell-gasair-pressure-limit-switch-12-5-12-in-water-column","provider":"Alo Tech Solutions","version":"1.0","type":"link"}