MFR 012

MFR 012

Mechanical Hygrostat MFR 012

  • 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

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Switch difference* 4% RH (±3% tolerance)
Permissible air velocity 15m/sec
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
Connection 3-pole terminal for 2.5mm², clamping torque 0.5Nm max.: rigid wire 2.5mm², stranded wire (with wire end ferrule) 1.5mm²
Mounting clip for 35mm DIN rail, EN60715
Casing plastic according to UL94 V-0, light grey
Dimensions 67 x 50 x 38mm
Weight approx. 60g
Fitting position variable
Operarting/Storage temperature 0 to +60°C (+32 to +140°F) / -20 to +80°C (-4 to +176°F)
Protection type IP20
Approvals VDE and UL submitted

*at 50% RH

Art. No. Setting range
01220.0-00 35 to 95% RH

Technical drawing

MFR 012