STEGO Electronic hygrotherm ETF 012


ETF 012
The electronic hygrotherm simultaneously monitors the temperature and humidity in enclosures and control cabinets. Condensation is prevented by switching heating and fans on or off as needed.
The version with an external sensor can be installed anywhere in the control cabinet and enables precise measurement.
  • Adjustable temperature and humidity
  • Wide voltage range
  • High switch performance
  • Operating temperature as low as -40 °C
  • Optical status indicator

Overview Technical Data

2 K (±1 K tolerance) at +25 °C (+77 °F), 50% RH
4% RH (±1% tolerance) at +25 °C (+77 °F), 50% RH
~ 5 s
change-over contact (relay)
VDE: NO/NC > 15,000 cycles
UL: NO/NC > 30,000 cycles
240 VAC, 10 (1.6) A
60 VDC, 0.6A¹
AC 30 A for 10 s
5-pole terminal, clamping torque 0.5Nm max.:
rigid/stranded² wire 2.5mm² (AWG 14)
clip for 35mm DIN rail, EN 60715
plastic according to UL94 V-0, light grey
77 x 60 x 43 mm
~ 0,2 kg
-40 to +60 °C (-40 to +140 °F)
< 90% RH (non-condensing)
VDE, UL File No. E164102, EAC

¹ not UL confirmed
² When connecting with stranded wires, wire end ferrules must be used.

Product variants

Note: For the data of the cable version 01231.x-yy please refer to the data sheet

Summary of your request

Art. No. Connection casing Casing Productname Series Heating element Heater body Model Axial fan Operating voltage Operating voltage
Operating voltage
Voltage type Frequency Heating capacity Inrush current
Surface temperature Rec. pre-fuse
T (time-delay)
Connection Connection PE Air outlet temperature Switch-off temperature Switch-off temperature 2 Switch-on temperature Switch-on temperature 2 Drilling template Operating temperature Flow rate,
free flow
Flow rate,
with filter
Setting range Setting range 2 Current
Nominal current
of socket
Average noise level Enclosure cut-out Enclosure cut-out Storage temperature Storage humidity Ambient temperature Operating humidity Speed Switching capacity
Switching current
Load resistance (external) External Sensor Measuring range Measuring range 2 Note Note 2 Note 3 Note 4 Reaction time Contact type Service life Operation indicator Control contact -
Signal current
Electrical protection Switch Socket Material Material sealing Air permeability Mounting Air intake/Air outlet Filter material Measuring signal Switch temperature
Lamp type Luminous flux Light colour Length / Depth Width Height Diameter Installation depth Fitting position Mounting frame Weight Sensor element Protection class Protection type Protection type UL VDE UL EAC METRO ATEX Ex Protection type Gases Ex Protection type Mine applications Ex Protection type Dusts Temperature class Temperature safety
Accessory Accessory 2 Accessory 3 Accessory 4 Art. No. Accessory Art. No. Accessory 2 Art. No. Accessory 3 Art. No. Accessory 4 Catalogue Article CAD

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STEGO Elektrotechnik GmbH
Kolpingstraße 21
74523 Schwäbisch Hall