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Electronic hygrotherm - ETF 012


  • Temperature and humidity regulation
  • LED indication of active values
  • High breaking capacity
  • Quick mount for DIN rail

Product description

This electronic hygrotherm detects humidity and temperature and operates a relay contact to switch in a heater or fan when one of the set values is reached. LED indication is clearly visible behind each setting knob and illuminates when set value is reached.


Part numbers

Parts Price Control range temperature from Control range temperature to Control range temperature from Control range temperature to Hysteresis Mounting Voltage max Voltage min Plastic cover
0 °C 60 °C 60 V dc 20 V dc Light grey plastic, UL94 V-0
0 °C 60 °C 2 °C (tolerance ±1 °C) @ 25 °C and 50% RH DIN-rail 35mm, quick mount 265 V ac 90 V ac Light grey plastic, UL94 V-0
32 °F 140 °F 265 V ac 90 V ac


Stego ETF012 Electronical hygrotherm

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

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

Safety & approvals

Plastic cover Light grey plastic, UL94 V-0
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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