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Uses of Siemens® QFA 2071 Temperature and Humidity Room Sensor:
- To monitor Relative Humidity, Temperature in ventilating, and air conditioning plants to acquire.
- The Temperature and Humidity Room Sensor is used as a Control sensor
- Siemens® QFA 2071 is used as a measuring sensor for indicating units or building automation and control systems.
Relative Humidity: The sensor acquires the relative humidity in the room via its capacitive humidity sensing element whose electrical capacitance changes as a function of the relative humidity. The electronic measuring circuit converts the sensor’s signal to a continuous DC 0 to 10 V or 4 to 20 mA signal, which corresponds to 0 to 100 % relative humidity
Temperature: The sensor acquires the temperature in the room via its sensing element whose electrical resistance changes as a function of the temperature. This change in resistance is converted to an active DC 0…10 V or 4…20 mA output signal, corresponding to a temperature range of 0 to 50 °C, –35 to +35 °C, or -40 to +70 °C. The measuring range can be selected. The temperature is provided as a simulated passive LG-Ni 1000 or T1 output signal ( 0 to 50 °C) as an alternative to the active output signal.
|Measuring Parameters||Humidity, Temperature|
|Temperature||0 to 50 ℃|
|Humidity||0 to 100 %RH|
|Accuracy_1||At 0 to 95 % R.H. and 23 ºC: ±5 % | At 30...70 % r.h. and 23 ºC: ±3 %|
|Output||4 to 20mA|
|Operating Voltage||DC 13.5...35 V|
|Measurement Accuracy||At 0...95 % r.h. and 23 ºC: ±5 %, At 30...70 % r.h. and 23 ºC: ±3 %|
|Time constant||Humidity <20 s, Temperature <8.5 min|
|Connection, electrical||Screw terminals|
|Type of fixing||Screws|
|Degree of Protection||IP30|
|Dimensions||90 x 100 x 36 mm|