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Electronic hygrotherm with External Sensor - ETF 012


  • Temperature and humidity regulation
  • LED indication of active values
  • External sensor
  • 1 or 2 m cable
  • Wide voltage range

Product description

This electronic hygrotherm measures both humidity and temperature and switches a relay contact to control a heater or fan when one of the set values is reached.

The is model has the option of either a 1 or 2 m long external sensor, so it can be mounted in the best position within larger enclosures.


LED's indication is clearly visible behind each setting knob, indicate whent he ouput is active.


Part numbers

Parts Price Voltage max Voltage min Cable length
60 V dc 20 V dc 1000 mm
60 V dc 20 V dc 2000 mm
265 V ac 90 V ac 1000 mm
265 V ac 90 V ac 2000 mm


ETF 012 Hygro, 0…60°C, 50…90% RH, change over, 24-48V dc - 1m cable

Technical data

General data

Control range temperature from 0 °C
Control range temperature to 60 °C
Hysteresis temperature 2K @ +25°C, 50% RH
Control range humidity from 50 % RF
Control range humidity to 90 % RF
Hysteresis humidity 4% RH @ +25°C, 50% RH
Mounting Clip on, DIN rail
Contact type Changeover (SPDT)
Colour Light grey

Rated operating conditions

Voltage max 60 V dc
Voltage min 20 V dc
Inrush max 30 A
Breaking capacity Resistive load: 240 V AC 10 (1,6) A, inductive load, cosφ=0,6: 240 V AC 3 A, 120 V AC 3 A. 24 V DC 4 A
Contact resistance <10 mΩ
Connection type 5-pole terminal
Operational Temperature -40°C ... +60°C
Storage temperature -40°C ... +60°C
Life span VDE: NO/NC > 15,000 cycles, UL: NO/NC > 30,000 cycles
Operating humidity < 90% RH
Humidity storage <90% RH


Height 77 mm
Width 60 mm
Depth 43 mm
Weight 0,2 kg
Material of body Plastic
Cable length 1000 mm

Safety & approvals

IP class IP20
Approvals CE, cULus, EAC, RoHS, UL, UL E164102, VDE
Flammability class UL94-V0
EMC EN 55014-1-2, EN 61000-3-2, EN 61000-3-3


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