Siemens® QFA 2071 Temperature and Humidity Room Sensor

Product Id : 157392


Siemens® QFA 2071 Temperature and Humidity Room Sensor is used for continious monitoring of critical parameters like Temperature, Relative Humindity in air conditioning, and ventilating plants. This Room sensor can also be used as a control sensor and measuring sensor for building automation and control systems or indicating units.
Applications: HVAC, IT Companies, Commercial Buildings, etc.

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Country : United States

Product Description

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.

Additional Information

Weight 1 kg
Manufacturer Siemens
Model No QFA2071
Measuring Parameters Humidity, Temperature
Temperature 0 to 50 ℃
Accuracy 0.3℃
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
Weight 205 Grams


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