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STEGO Enclosure Thermostats
Home > Products > Thermostat & Heater > Mechanical Hygrostat

Mechanical Hygrostat

Product name : Mechanical Hygrostat

Item : MFR 012

Details :
  • Adjustable relative humidity
  • Change-over contact
  • High switching capacity
  • Easily accessible terminals
  • Clip fixing
The electromechanical hygrostat MRF 012 is designed to control enclosure heaters so that the dew point is raised when a critical relative humidity of 65% is exceeded. In this way condensation and corrosion is effectively prevented.
Technical Data
Switch difference*
4% RH (±3% tolerance)
Permissible air velocity
Contact type
change-over contact
Contact resistance
< 10mOhm
Service life
> 100 000 cycles
Min. switching capacity
20V AC/DC 100 mA
Max. switching capacity
250 VAC, 5 (1) A
DC 20W
acc. to EN 55014-1-2, EN 61000-3-2, EN 61000-3-3
3-pole terminal for 2.5mm², clamping torque 0.5Nm max.: rigid wire 2.5mm², stranded wire (with wire end ferrule) 1.5mm²
clip for 35mm DIN rail, EN50022
plastic according to UL94 V-0, light grey
Dimensions/ weight
67 x 50 x 38mm approx. 60g
Fitting position
Operarting/Storage temperature
0 to +60°C (+32 to +140°F) / -20 to +80°C (-4 to +176°F)
Protection type

Art. No.
Setting range
*at 50% RH
35 to 95% RH

Example of Connection

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