HVAC Sensors

Manufacturer Part Number: 88K3001 Lennox 88K3001/ 88K30 Heat Pump Defrost Sensor. Opens at 42 degrees. This sensor mounts on a 3/8 Copper line in the Heat Pump. When a defrost sensor goes bad, the heat pump will often freeze.Installation...

Manufacturer Part Number: T8100-D-LN CO2 ventilation controller that communicates with Prodigy and Lennox equipment, as well as electromechanically controlled third-party equipment.Supports constant volume bypass and true variable air volume zoning...

USED RETURN: This is an open-box item returned by a customer within our 30-day refund period. Box may be missing or open but item is like new. Item has been inspected and/or tested and is in excellent working condition. Eligible for our 30-day return...

Manufacturer Part Number: QAA2212.FWSN Siemens QAA2212.FWSN is a room sensor designed for use with Siemens Terminal Equipment Controllers (TECs). This sensor communicates with the controller using an RJ-11 cable with plug connections at both ends for...

Manufacturer Part Number: QPA2282.EWSC Siemens QPA2282.EWSC is a room temperature and CO2 sensor designed for use with Siemens Terminal Equipment Controllers (TECs). This sensor communicates with the controller using an RJ-11 cable with plug connections...

Manufacturer Part Number: QPA2284.EWSC Siemens QPA2284.EWSC is a room temperature, humidity, and CO2 sensor designed for use with Siemens Terminal Equipment Controllers (TECs). This sensor communicates with the controller using an RJ-11 cable with plug...

Manufacturer Part Number: QFA3280.EWSC Siemens QFA3280.EWSC is a room temperature and humidity sensor designed for use with Siemens Terminal Equipment Controllers (TECs). This sensor communicates with the controller using an RJ-11 cable with plug...

Manufacturer Part Number: QAA2232.FWSN Siemens QAA2230.FWSN is a room temperature sensor designed for use with Siemens Terminal Equipment Controllers (TECs). This sensor communicates with the controller using an RJ-11 cable with plug connections at both...

Manufacturer Part Number: QAA2230.FWSN Siemens QAA2230.FWSN is a room temperature sensor designed for use with Siemens Terminal Equipment Controllers (TECs). This sensor communicates with the controller using an RJ-11 cable with plug connections at both...

Manufacturer Part Number: QAA2220.EWSN Siemens QAA2220.EWSN is a room temperature sensor designed for use with Siemens Terminal Equipment Controllers (TECs). This sensor communicates with the controller using an RJ-11 cable with plug connections at both...

Manufacturer Part Number: QFA3280.DWSC Siemens QFA3280.DWSC is a room temperature and humidity sensor designed for use with Siemens Terminal Equipment Controllers (TECs). This sensor communicates with the controller using an RJ-11 cable with plug...

Manufacturer Part Number: QFA3212.FWSN Siemens QFA3212.FWSN is a room sensor designed for use with Siemens Terminal Equipment Controllers (TECs). This sensor communicates with the controller using an RJ-11 cable with plug connections at both ends for...