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Siemens® QFM2171 Duct Sensor transmits the changes in humidity & temperature to the building control systems. These sensors are mainly suitable for applications where precise, stable humidity sensing is requires.
Siemens® QFM2171 Duct Sensors are for use in air ducts of ventilation and air conditioning plants for acquiring:
- Relative Humidity
The sensors are mainly uses in:
- 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
|Measuring Parameters||Temperature and Relative Humidity|
|Temperature||-35 to +35 °C, -40 to +70 °C, 0 to 50℃|
|Humidity||0 to 100 %RH|
|Operating Voltage||DC 13.5...35 V|
|Sensing element, temperature||DC 4 to 20 mA|
|Time constant||Humidity: 20 s, Temperature: 20 s|
|Immersion length||90...154 mm|
|Connection, electrical||Screw terminals|
|IP Rating||IP 54|
|Type of fixing||Flange|
|Analog Output, Signal||DC 0...10 V, DC 4...20 mA|
|Signal output temperature||DC 4 to 20 mA|
|Signal output humidity||DC 4 to 20 mA|
|Dimensions||80 X 88 X 39mm|
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