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Humidity Sensor FG120 (r.h.) Humidity Temperature Sensor TFG120

  • with the robust Polyga® humidity measuring element
  • excellent measuring properties
  • very high accuracy in high humidity
  • outstanding durability
  • Indoor version

General information

(T)FG120H with resistance output
(T)FG120 with current or voltage output


  • Humidity: ± 2,5% r.h. >40% r.h.
  • Temperature ± 0,5 K

POLYGA® transmitters demonstrate excellent measuring properties and accuracy in high humidity. They can be adjusted and cleaned in water. Their outstanding durability, reliability and robustness make them the classic choice for applications in food processing such as proofi ng and ripening or applications with extended high humidity.

Technical data

Physical data
humidity measuring range 0...100%rh
measuring accuracy
>40%rh ±2.5%rh
<40%rh ...according to tolerance diagram
working range 35...100%rh
temperature measuring accuracy +/-0.5°C
working range -10...+60°C
measuring medium air, pressureless, non-aggressive
permissible ambient temperature 0...50°C
mean temperature coefficient -0.1%/K at 20ºC and 50%rh
adjustment at average air pressure 430m NN
permissible air speed 15m/sec
half-life period at v=2m/sec min
fixing slots in housing base
mounting position optional, preferably with ventilation slots
at right angles to direction of airflow
connecting terminals for conductor cross sections 0.5mm²
cable connection by flush device box
EMC-tested to EN 50 081-2, to EN 50 081-2
housing impact resistant plastic, light
protective system IP20
weight approx. 0.2 kg
Electrical data
Humidity Output 1 0...100 ohms linear 2-wire
0...200 ohms linear 2-wire
0...1000 ohms linear 2-wire
100...138.5 ohms linear 2-wire
5..100..5 ohms unlinear 3-wire
further resistance ranges on request
permissible load 1.0 watt
max. voltage 42V
insulation resistance 10 Mohms
(only for TFG120)
Temperature Output 2 Pt100 ref. DIN EN 60751
permissible load for air 1m/sec and t=0.1K 2 mA

Do you have questions on this product?

Your contact person:

Badger Meter Swiss AG
Mittelholzerstrasse 8
CH-3006 Bern