Electronic Hygrotherm
ETF 012

  • Efficient temperature & humidity control
  • Wide voltage range
  • Operating temperature down to -40 °C
  • High switching capacity
  • DIN rail mountable

The ETF 012 senses the ambient temperature and relative air humidity in an enclosure. Depending on which contact combination is chosen, it then turns on or off a connected device if either the temperature is below or the humidity is above the set point. The integrated LED in each adjustment knob is lit when indicating the active function.

Technical Data

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Technical Data

Switching difference (temperature)2 K (±1 K tolerance) at +25 °C (+77 °F), 50 %RH
Switching difference (humidity)4 %RH (±1 % tolerance) at +25 °C (+77 °F), 50 %RH
Reaction time (humidity)approx. 5 sec.
Contact typechange-over contact (relay)
Service lifeVDE: NO/NC > 15,000 cycles
UL: NO/NC > 30,000 cycles
Max. switching capacity (relay output)10 A resistive / 1.6 A inductive @ AC 240 V
0.6 A @ DC 60 V¹
Max. inrush currentAC 30 A for 10 sec.
Connection5-pole terminal, clamping torque 0.5 Nm max.:
solid/stranded² wire - AWG 14 max. (2.5 mm²)
Housingplastic, UL 94V-0, light grey
Mountingclip for 35 mm DIN rail, EN 60715
Mounting positionvertical
Operating/Storage temperature-40 to +140 °F (-40 to +60 °C)
Operating/Storage humiditymax. 90 %RH (non-condensing)
Dimensions3.0 x 2.4 x 1.7" (77 x 60 x 43 mm)
Weightapprox. 3.5 oz. (100 g)
Protection typeIP20
ApprovalsUL File No. E164102, VDE, EAC

¹ not UL confirmed

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² When connecting with stranded wires, wire end ferrules must be used.

Part No.Operating voltageSetting range - temperatureSetting range - humidity
01230.0-00AC 100-240 V, 50/60 Hz (min. AC 90 V, max. AC 265 V)0 to +60 °C50 to 90 %RH
01230.9-00AC 100-240 V, 50/60 Hz (min. AC 90 V, max. AC 265 V)+32 to +140 °F50 to 90 %RH
01230.1-00DC 24-48 V (min. DC 20 V, max. DC 60 V)0 to +60 °C50 to 90 %RH

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Dimensioned Drawing

ETF 012 Electronic Hygrotherm

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