Carrier HH79NZ039 Sensor

The Carrier HH79NZ039 is a Factory Authorized Part designed for high-accuracy thermal monitoring in commercial and residential HVAC systems. This versatile thermistor is primarily utilized as an Outdoor Air Temperature (OAT) sensor, providing critical data to the economizer logic 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.

Built with a 10K ohm NTC thermistor 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 dry bulb temperature feedback, the HH79NZ039 sensor helps contractors maintain system efficiency, optimize ventilation control, and prevent unnecessary compressor cycling in packaged rooftop units and split systems.

• Multi-Sensing Versatility: Can be configured as an OAT, SAT, RAT, or EDT sensor to meet various field requirements.
• Precise Calibration: Features a 10K NTC element that matches OEM specifications for accurate environmental monitoring.
• Economizer Integration: Essential for determining free-cooling operational modes in commercial economizers.
• Robust Lead Length: 18-1/4 inch leads provide sufficient reach for mounting on outside air dampers or within air handling units.
• Simplified Wiring: Equipped with standard male spade connectors for secure attachment to HVAC control systems.

What is the resistance value of the Carrier HH79NZ039?
This sensor uses a 10K ohm NTC (Negative Temperature Coefficient) thermistor, providing specific resistance values that correspond to air temperature changes for the controller.

Where is this sensor typically mounted in a rooftop unit?
When 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.

Does this part replace other Carrier temperature sensors?
Yes, 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.

Disclaimer: 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.