MFR012
This mechanical hygrostat is designed to control humidity levels inside electrical enclosures, cabinets, and telecom equipment. With an adjustable range of 40–90% relative humidity, it automatically triggers fans or heaters to prevent condensation, protecting sensitive components from moisture damage and corrosion. It features a simple, reliable mechanical design that requires no power supply for operation, […]
This mechanical hygrostat is designed to control humidity levels inside electrical enclosures, cabinets, and telecom equipment. With an adjustable range of 40–90% relative humidity, it automatically triggers fans or heaters to prevent condensation, protecting sensitive components from moisture damage and corrosion.
It features a simple, reliable mechanical design that requires no power supply for operation, ensuring stable, maintenance-free performance in industrial and commercial environments. The DIN rail mount allows for quick and easy installation, making it an ideal choice for preventing dampness and extending the lifespan of your electrical equipment.
Adjustable relative humidity
Change-over contact
High switching capacity
Easily accessible terminals
Clip fixing
Technical Data
| Switch difference* | 4% RH (±3% tolerance) |
| Permissible air velocity | 15m/sec |
| Contact type | change-over contact |
| Service life | > 50,000 cycles |
| Min. switching capacity | 20V AC/DC 100 mA |
| Max. switching capacity | 25VAC, 5A |
| 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) / -40 to +60°C (-40 to +140°F) |
| Operating / Storage humidity | max. 90 % RH (non-condensing) |
| Protection type | IP20 |
| Approvals | UL File No. E164102 |
| *at 50% RH | |
| Art. No. | Setting range |
| 01220.0-00 | 35 to 95% RH |
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