{"product_id":"t921a1191-honeywell-proportional-low-voltage-thermostat-24-30vdc-56-84f-135o-potentiometer","title":"T921A1191 | Honeywell Proportional Low Voltage Thermostat 24–30VDC, 56–84°F, 135Ω Potentiometer","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-end=\"396\" data-start=\"144\"\u003eThe Honeywell T921A1191 is a proportional low-voltage thermostat designed for precise temperature control in heating and cooling systems that utilize valve motors, damper motors, and balancing relays.\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\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eControls \u0026amp; Indicators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThermostat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT921A1191\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProportional Low Voltage Thermostat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLow Voltage Thermostat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eValve Motors, Damper Motors, Balancing Relays (Heating\/Cooling Systems)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e24–30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eControl Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e135-ohm Potentiometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eScale\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFahrenheit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e56°F to 84°F (13°C to 28°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWall mount (Horizontal orientation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5.68 × 3.37 × 2.25 in (144 × 86 × 58 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing Color\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGray\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHousing Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThermoplastic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eControl Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProportional (Manual Dial)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmbient Temperature Limits\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e32°F to 122°F (0°C to 50°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eElectrical Connections\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTerminal block or pigtail leads (depending on model)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication Environment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCommercial\/Industrial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIndicator Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAnalog scale (Fahrenheit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEnclosure Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIndoor use only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Requirement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone (self-powered via control circuit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.90 lb (0.41 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About \u003cspan data-sheets-root=\"1\"\u003eT921A1191\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe Honeywell T921A1191 is part of the T900 series of low-voltage proportional thermostats known for their high accuracy and compatibility with pneumatic and electric actuator control systems. It features a 135-ohm potentiometer element, translating temperature changes into proportional voltage or current signals for precise modulation of valve and damper motors. With a sleek gray housing and horizontal wall-mount design, the thermostat is ideal for installations in offices, hospitals, schools, and other commercial spaces requiring reliable, long-term environmental control.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProportional Control Thermostat: Provides smooth, linear output signals for modulating devices, enabling stable room temperature without cycling.\u003c\/li\u003e\n\u003cli\u003eLow Voltage Operation: Designed for systems operating at 24–30 VDC—ideal for electric valve and damper motor applications.\u003c\/li\u003e\n\u003cli\u003eWide Temperature Range: Adjustable setpoint from 56°F to 84°F (13°C to 28°C) for broad environmental compatibility.\u003c\/li\u003e\n\u003cli\u003ePrecision Potentiometer Element: Equipped with a 135-ohm potentiometer for accurate proportional output signal response.\u003c\/li\u003e\n\u003cli\u003eUniversal Compatibility: Works with valve motors, damper motors, and balancing relays in both heating and cooling configurations.\u003c\/li\u003e\n\u003cli\u003eDurable Housing: Constructed with a gray thermoplastic case, offering long service life in commercial settings.\u003c\/li\u003e\n\u003cli\u003eHorizontal Wall Mounting: Simple installation and aesthetic integration with standard electrical wall boxes.\u003c\/li\u003e\n\u003cli\u003eSmooth Manual Adjustment: Easy-to-use temperature dial with Fahrenheit markings for intuitive setpoint control.\u003c\/li\u003e\n\u003cli\u003eStable and Reliable Operation: Mechanical components engineered for minimal wear and extended calibration stability.\u003c\/li\u003e\n\u003cli\u003eCompact Design: Low-profile housing suitable for both retrofit and new installations in modern HVAC systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe T921A1191 offers dependable, energy-efficient proportional temperature regulation for precise indoor climate control in professional and industrial environments.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":49105127211264,"sku":"T921A1191","price":1458.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/shopping_4_c98b3fd7-3364-47b8-8817-db5a9ec9faa8.webp?v=1785540874","url":"https:\/\/alotechparts.com\/products\/t921a1191-honeywell-proportional-low-voltage-thermostat-24-30vdc-56-84f-135o-potentiometer","provider":"Alo Tech Solutions","version":"1.0","type":"link"}