{"product_id":"schneider-electric-tk-4001-temp-control","title":"Schneider Electric (Barber Colman) TK-4001 Temp Control","description":"\u003cp\u003eThe \u003cstrong\u003eSchneider Electric (Barber Colman) TK-4001\u003c\/strong\u003e is a high-performance \u003cstrong\u003epneumatic bulb thermostat\u003c\/strong\u003e designed for \u003cstrong\u003eproportional temperature control\u003c\/strong\u003e on reheat systems, return air terminal units, and sampling chambers. Engineered for \u003cstrong\u003eheating\u003c\/strong\u003e applications, this \u003cstrong\u003edirect acting\u003c\/strong\u003e controller features a 1\/8\" x 48\" \u003cstrong\u003eaveraging bulb\u003c\/strong\u003e that ensures accurate thermal sensing across wide duct spans. With a factory-set 15 psig \u003cstrong\u003esupply air pressure\u003c\/strong\u003e and a 60-90°F operating range, the TK-4001 provides the reliability veteran HVAC technicians expect from the Barber Colman legacy. The device utilizes a balanced lever system and liquid-filled sensing element to modulate \u003cstrong\u003epneumatic valves\u003c\/strong\u003e and dampers with precision. The \u003cstrong\u003ethrottling range\u003c\/strong\u003e is fully adjustable from 2-10°F, allowing contractors to fine-tune \u003cstrong\u003ebranch line pressure\u003c\/strong\u003e (typically 8 psig at setpoint) to match specific \u003cstrong\u003eHVACR\u003c\/strong\u003e system loads. Built for longevity, the unit includes a rugged case rated for a 140°F safe temperature and supports \u003cstrong\u003efield changeable\u003c\/strong\u003e action for diverse installation requirements.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Sensing:\u003c\/strong\u003e The 4-foot \u003cstrong\u003eaveraging bulb\u003c\/strong\u003e eliminates hot or cold spots in the air stream, providing superior \u003cstrong\u003eproportional control\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Calibration:\u003c\/strong\u003e Adjustable \u003cstrong\u003ethrottling range\u003c\/strong\u003e permits custom sensitivity settings for complex \u003cstrong\u003epneumatic control\u003c\/strong\u003e loops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eField Adaptable:\u003c\/strong\u003e While factory-set as \u003cstrong\u003edirect acting\u003c\/strong\u003e, the internal lever system can be modified for reverse acting operation in the field.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContractor Grade:\u003c\/strong\u003e Standard 1\/8\" NPT air connections and \u003cstrong\u003etop mounting\u003c\/strong\u003e holes ensure seamless integration into existing \u003cstrong\u003eSchneider Electric\u003c\/strong\u003e or legacy Barber Colman footprints.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCan this unit be used for cooling?\u003c\/strong\u003e The TK-4001 is primarily a \u003cstrong\u003eheating thermostat\u003c\/strong\u003e, but it can be field-changed to reverse acting if the application requires an increase in output on temperature drop.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is the maximum air pressure?\u003c\/strong\u003e The device handles up to 30 psig, though standard \u003cstrong\u003esupply air pressure\u003c\/strong\u003e is typically maintained at 15 or 20 psig for optimal \u003cstrong\u003eAEO\u003c\/strong\u003e performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs the bulb compatible with wells?\u003c\/strong\u003e Yes, the 1\/8\" diameter capillary can be used with standard AT-series \u003cstrong\u003ebulb wells\u003c\/strong\u003e for liquid line or tank monitoring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Schneider Electric","offers":[{"title":"Default Title","offer_id":17428837105779,"sku":"TK-4001","price":256.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_6b354847-e7e0-465a-9985-f04fb0f69aa5.png?v=1541547995","url":"https:\/\/www.gsistore.com\/en-ca\/products\/schneider-electric-tk-4001-temp-control","provider":"GSIstore","version":"1.0","type":"link"}