{"product_id":"carrier-hh79nz039-sensor","title":"Carrier HH79NZ039 Sensor","description":"\u003cp\u003eThe \u003cstrong\u003eCarrier HH79NZ039\u003c\/strong\u003e is a \u003cstrong\u003eFactory Authorized Part\u003c\/strong\u003e designed for high-accuracy thermal monitoring in commercial and residential HVAC systems. This versatile \u003cstrong\u003ethermistor\u003c\/strong\u003e is primarily utilized as an \u003cstrong\u003eOutdoor Air Temperature (OAT) sensor\u003c\/strong\u003e, providing critical data to the \u003cstrong\u003eeconomizer logic\u003c\/strong\u003e to determine free-cooling eligibility. Beyond ambient air sensing, the HH79NZ039 is engineered for multi-mode service, functioning effectively as a Supply Air Temperature (SAT), Return Air Temperature (RAT), or Exhaust Duct Temperature (EDT) sensor depending on its placement within the air handler or ductwork.\u003c\/p\u003e\n\n\u003cp\u003eBuilt with a \u003cstrong\u003e10K ohm NTC thermistor\u003c\/strong\u003e element, this sensor ensures consistent resistance-to-temperature curves across a wide operating range (-30°C to 50°C). The 18-1\/4 inch lead length and male spade\/eye connectors allow for straightforward termination on terminal boards or direct wiring into control circuits. By providing reliable \u003cstrong\u003edry bulb temperature\u003c\/strong\u003e feedback, the \u003cstrong\u003eHH79NZ039 sensor\u003c\/strong\u003e helps contractors maintain system efficiency, optimize ventilation control, and prevent unnecessary compressor cycling in packaged rooftop units and split systems.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Sensing Versatility:\u003c\/strong\u003e Can be configured as an OAT, SAT, RAT, or EDT sensor to meet various field requirements.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Calibration:\u003c\/strong\u003e Features a 10K NTC element that matches \u003cstrong\u003eOEM specifications\u003c\/strong\u003e for accurate environmental monitoring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEconomizer Integration:\u003c\/strong\u003e Essential for determining \u003cstrong\u003efree-cooling\u003c\/strong\u003e operational modes in commercial economizers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobust Lead Length:\u003c\/strong\u003e 18-1\/4 inch leads provide sufficient reach for mounting on outside air dampers or within air handling units.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSimplified Wiring:\u003c\/strong\u003e Equipped with standard male spade connectors for secure attachment to HVAC control systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the resistance value of the Carrier HH79NZ039?\u003c\/strong\u003e\u003cbr\u003e\nThis sensor uses a 10K ohm NTC (Negative Temperature Coefficient) thermistor, providing specific resistance values that correspond to air temperature changes for the controller.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhere is this sensor typically mounted in a rooftop unit?\u003c\/strong\u003e\u003cbr\u003e\nWhen used as an OAT sensor, it is commonly factory-mounted or field-installed on the outside air damper or near the fresh air intake to monitor ambient conditions.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this part replace other Carrier temperature sensors?\u003c\/strong\u003e\u003cbr\u003e\nYes, it is often used as a direct replacement in systems requiring a 10K NTC sensor for OAT, SAT, or RAT applications in models like the 48A2 series and other Carrier-branded equipment.\u003c\/p\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":"Carrier","offers":[{"title":"Default Title","offer_id":558546518041,"sku":"HH79NZ039","price":49.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_3914bab3-7313-46b2-b4f4-bee8028dc0aa.png?v=1791329670","url":"https:\/\/www.gsistore.com\/products\/carrier-hh79nz039-sensor","provider":"GSIstore","version":"1.0","type":"link"}