Description
The Lennox 49M81 Air Supply Sensor is a duct-mounted analytical probe that measures supply air temperature and airflow conditions to support accurate system regulation and diagnostics. It operates using a thermistor-based detection element that converts temperature changes into electrical resistance signals for the control system to interpret and adjust operation accordingly. In HVAC systems, it is used in air handlers and rooftop equipment to monitor supply air conditions and help maintain stable comfort levels and efficient performance. It is typically mounted within the supply air duct path and supports precise temperature monitoring, improved system control, and reliable operational input.
