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  5. HG 125

Electronic thermohygrostat HG 125

Humidity/temperature-based device control in operating environments from -30 °C even at very low humidity values – Made in Germany

Temperature and humidity at a glance

The HG 125 comes with two configurable switching contacts (RH/temp.) and enables electronic control even at very low humidity values in operating environments from -30 °C.

An external climate sensor continuously records temperature and humidity values at the measuring spot at a distance of up to 5 m, which are indicated in turns on the digital display of the HG 125.

The thermohygrostat is designed for direct connection to Trotec dehumidifiers with DIN socket for 7-pin plugs. If intending to use the hygrostat with 4-pin DIN socket Trotec dehumidifiers, the optionally available adapter transformer will be required in addition.

The thermohygrostat can also be used for combined heating with all Trotec devices which have a 7-pin DIN socket for connection, such as the multi air handlers TAC XT 18 and TAC XT 27. These devices can be temperature-controlled for decentralised room air heating via existing ventilation systems or textile air distributors using the HG 125.

DIN socket for external circuits (example TAC XT)
DIN socket for external circuits

Save electricity and money on dehumidification

With our HG 125 hygrostat, you save additional cash when dehumidifying or keeping damp rooms dry. The programmable switch is simply plugged into the dehumidifier with the 7-pin DIN connector to regulate dehumidification based on the measured humidity.

When the desired target humidity is reached, the hygrostat shuts down the unit, noticeably reducing the unit's energy consumption. The initial cost of the energy-saving HG 125 thus pays for itself in a very short time.

Furthermore, many dehumidifiers only have coarse target settings for optimum humidity. The HG 125 hygrostat allows the room humidity to be regulated in 2 % steps between 0 % and 100 % by connected dehumidifiers and thus offers a much more precise target humidity selection.

Temperature and dehumidification control in continuous operation - wherever it is needed

Thermohygrostat HG 125 - Application example temperature
Continuous air temperature measurement: The external thermohygrostat HG 125 can be used to control heating devices according to temperature.
Thermohygrostat HG 125 - Humidity application example
Continuous air humidity measurement: With the external thermo-hygrostat HG 125, drying units can be controlled depending on the air humidity.
All room hygrostats in direct comparison:

All room hygrostats in direct comparison:

In order to find exactly the right room hygrostat for you, you have the possibility to clearly compare all room hygrostats of the HG series from Trotec.

Models that you do not want to include in the comparison can simply be clicked away.

Technical data in comparison

A few practical benefits:

  • Two configurable switching contacts for temperature and humidity
  • Climate sensor for temperature and humidity with 5 m cable length
  • 7-pin DIN connector with 5 m cable
  • Setpoint settings for humidity control from 0 to 100 % r.h. and for temperature control from -30 °C to +70 °C programmable

Other room hygrostats


Elektronischer Thermohygrostat HG 125 show in Trotec online shop

Technical data

Technical data
General information
  Article number
  Min. regulation range [% r.F.] 5
  Max. regulation range [% r.F.] 95
Measurement accuracy
  +/- RH [%] 2
Ambient temperature
  min. [°C] -30
  max. [°C] 80
Electrical values
  Voltage [V] 48
  Max. switching load [A] 2
Electric connection
  Connection plug DIN socket
  Cable length [m] 5
Safety feature
  Type of protection IP30
  Length (packaging excluded) [mm] 29
  Width (packaging excluded) [mm] 81
  Height (packaging excluded) [mm] 83
  (packaging excluded) [kg] 1.48

 standard equipment

 optionally available

 not available



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