Siemens® QFM2171 Duct Sensor


Siemens® QFM2171 Duct Sensor transmits changes in humidity and temperature to the building control systems. These sensors are mainly suitable for applications where precise, stable humidity sensing is required.

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Country : Germany

Product Description

Siemens® QFM2171 Duct Sensors are for use in air ducts of ventilation and air conditioning plant for acquiring:

  • Relative Humidity
  • Temperature

The sensors are used as:

  • Control sensors in the supply or extract air
  • Reference sensors, e.g. for shifting the dew point
  • Limit sensors, e.g. in connection with steam humidifiers

Additional Information

Weight 1 kg
Model No
Measuring Parameters Temperature and Relative Humidity
Temperature , ,
Accuracy ±0.3 °K
Operating Voltage
Sensing element, temperature
Time constant
Immersion length
Connection, electrical
IP Rating
Type of fixing
Analog Output, Signal DC 0...10 V, DC 4...20 mA
Signal output temperature
Signal output humidity


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