Siemens QFM3171 Temperature-Humidity Duct Sensor


(GST 18% Exclusive)

100 in stock


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(However please contact store for precise delivery schedule. Backorder also allowed)

Siemens QFM3171 Temperature and humidity duct sensor can be use in ventilation and air conditioning plants where high accuracy and short response times for measuring relative humidity are required. The measuring range covers the entire humidity range of 0…100 %.

Applications: Storage and production facilities in the paper, textile, pharmaceutical, food, chemical and electronics industry, Laboratories, Hospitals, Computer and EDP centers Indoor swimming pools, Greenhouses etc.

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Siemens QFM3171 Temperature and Humidity Sensor is used as an x control sensors in the supply or extract air x limit sensor for maximum limitation of supply air humidity after a steam humidifier x limit sensor, e.g. for measured value indication or for connection to a building automation and control system x sensor for enthalpy and absolute humidity, together with the SEZ220.

Features of Siemens QFM3171 Temperature and Humidity Sensor :

  • Operating voltage AC 24 V / DC 13.5…35 V
  • Signal output DC 0…10 V / 4…20 mA for relative humidity and temperature
  • Very high measuring accuracy across the entire measuring range
  • Function test
  • Capacitive humidity measurement

Additional information

Weight 1 kg


Model No


Measuring Parameters

Temperature, Humidity

Temperature Range

0 to 50 °C / -40 to +70 °C / -35 to 35°C


+/- 0.8°C for 15°C to 35°C, +1.0 °C for –40° to 15°C and 35°C to 70°C

Humidity Range

0 to 100%RH


+/- 2% RH

Operating Temperature

–40°C to 70°C / –40°F to 158°F

Operating Humidity

0 to 95% RH (non-condensing)

Immersion length

90…206 mm

Type of fixing



50/60 Hz at AC 24 V

Protection class

IP 54


Provided alongwith and valid for 1 year, traceable to National Standards.

Sensing element, temperature

DC 4 to 20 mA

Connection, electrical

Screw terminals

Signal output temperature

DC 4 to 20 mA

Time constant



80 X 88 X 39 mm


180 Grams

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Temperature Humidity Duct Sensor

Siemens QFM3171 Temperature-Humidity Duct Sensor


(GST 18% Exclusive)

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