{"product_id":"s637a1004-honeywell-sail-switch-1-3-metal-sail","title":"S637A1004 | Honeywell Sail Switch 1\" × 3\" Metal Sail","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-end=\"396\" data-start=\"144\"\u003eThe Honeywell S637A1004 is a line-voltage sail switch designed to sense air velocity in warm air ducts and ventilation systems. It uses a metal sail that actuates a SPDT snap switch, completing burner or fan control circuits only when sufficient airflow is present.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 99.964%; height: 392px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003eHVAC Controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003eS637A1004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003eSail Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eSwitch Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003eSPDT snap switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eSail Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003e1\" × 3\" (trim-to-fit option)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eInsertion Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003e3-1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eVoltage Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003e120 VAC \/ 240 VAC \/ 24 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 39.2px;\"\u003e\u003cstrong\u003eContact Ratings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 39.2px;\"\u003e8A @ 120VAC; 5A @ 240VAC; 2A @ 24VAC; 15A @ 6VDC; 7.5A @ 12VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eTemperature Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003eUp to 150°F (65°C) maximum ambient\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 39.2px;\"\u003e\u003cstrong\u003eDifferential Adjustment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 39.2px;\"\u003eManual via knurled knob on snap switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eConduit Knockouts\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003eOne on each end of the housing for wiring convenience\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eHousing Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003e2-15\/16\" H × 3-3\/4\" W × 2\" D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003eAirflow detection and safety interlock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eMounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003eDuct-mount, insertion type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003eBlowers, fans, crop dryers, and warm air systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 26.1525%; height: 19.6px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.7143%; height: 19.6px;\"\u003e0.99 lbs\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\"\u003eS637A1004\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe S637A1004 is part of Honeywell’s reliable line of airflow detection devices designed for HVAC and industrial heating systems. This sail switch responds to air movement by operating an internal SPDT snap switch, ensuring that a burner or fan circuit is energized only when airflow reaches a predetermined level. It is commonly used in heating ducts, crop dryers, and ventilation systems to prevent burner operation without sufficient air movement. The unit includes a 1\" × 3\" metal sail that can be trimmed to adjust sensitivity, a manually adjustable differential for fine-tuning, and conduit knockouts for flexible wiring options.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSPDT Snap Switch Mechanism: Provides precise airflow actuation with reliable contact operation in HVAC and industrial control systems.\u003c\/li\u003e\n\u003cli\u003eTrim-to-Fit Metal Sail: 1\" × 3\" sail can be reduced to half size, increasing the airflow velocity required to activate the switch.\u003c\/li\u003e\n\u003cli\u003eManual Differential Adjustment: Equipped with a knurled knob for fine-tuning the actuation differential to match system conditions.\u003c\/li\u003e\n\u003cli\u003eVersatile Electrical Ratings: Supports multiple voltage configurations—120V, 240V, and 24V—for use in various line or low-voltage control circuits.\u003c\/li\u003e\n\u003cli\u003eTemperature Resistant Design: Operates in ambient temperatures up to 150°F, making it suitable for high-temperature air ducts and heating systems.\u003c\/li\u003e\n\u003cli\u003eDurable Construction: Compact metal housing with conduit knockouts on both ends for easy wiring and installation flexibility.\u003c\/li\u003e\n\u003cli\u003eReliable Airflow Detection: Ensures burners or fans activate only when proper air velocity is achieved, enhancing safety and efficiency.\u003c\/li\u003e\n\u003cli\u003eCompact Installation Profile: Shallow housing and 3-1\/2\" insertion length allow installation in tight or narrow duct spaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe S637A1004 delivers the reliability and precision required for airflow monitoring and safety interlock functions in HVAC and agricultural drying systems.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":49105155031296,"sku":"S637A1004","price":674.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/S637A1004-2.jpg?v=1785541478","url":"https:\/\/alotechparts.com\/products\/s637a1004-honeywell-sail-switch-1-3-metal-sail","provider":"Alo Tech Solutions","version":"1.0","type":"link"}