Pay in 4 interest-free payments of $47.35 Learn more
Ships within 48 hours · Estimated delivery Sep 3 - Sep 8
20 and UL 372 standards
ensuring a tight fit that prevents bypass air from compromising system efficiency
this SPST (Single Pole Single Throw) switch ensures the blower motor is moving sufficient air for combustion before allowing the ignition sequence to proceed
Precise Monitoring: Built-in 2-10Vdc feedback and two SPDT auxiliary switches provide superior system status oversight
Industrial Durability: Constructed from high-quality galvanized steel to resist corrosion and withstand high flue gas temperatures
Siemens Building Technology QFM2171 326058-756 20 and UL 372 standardsThe Siemens Building Technology QFM2171 is a high performance duct relative humidity and temperature sensor designed for integration into commercial HVAC systems. This Q Series duct sensor utilizes a 4 20mA output signal for both RH and temperature, providing stable and precise data transmission even over long wire runs. Engineered for 5% accuracy, the QFM2171 is ideal for BAS (Building Automation Systems) that require reliable monitoring of supply,
