- Efficient condensation control
- Adjustable relative humidity range
- High switching capacity
- DIN rail mountable
The MFR 012 electromechanical hygrostat is designed to control the relative humidity inside enclosures. When connected to an enclosure heater (dehumidifier), it will energize the heater at the humidity set point in order to raise the dew point. This helps prevent damage and malfunction of electronic components caused by condensation and corrosion.¹
The MFR 012 can also be used to control cooling fans, warning lights or other devices.
¹ The critical relative humidity level for most components is 65%. Above 65% RH, condensation can form and cause malfunctions of electronic equipment. Long term, this can lead to corrosion and permanent damage of electronic components and systems.
| Switching difference | 4 %RH (± 3 % tolerance) - at 50 %RH |
|---|---|
| Permissible air velocity | 50 ft/sec (15 m/s) |
| Contact type | SPDT / change-over contact |
| Service life | > 50,000 cycles |
| Min. Switching capacity | 100 mA @ AC/DC 20 V |
| Max. Switching capacity | 5 A resistive @ AC 250 V DC 20 W |
| Connection | 3-pole terminal, clamping torque 0.5 Nm max.: solid wire - AWG 14 max. (2.5 mm²) stranded wire² - AWG 16 max. (1.5 mm²) |
| Housing | plastic, UL 94V-0, light grey |
| Mounting | clip for 35 mm DIN rail, EN 60715 |
| Mounting position | variable |
| Operating / Storage temperature | +32 to +140 °F (0 to +60 °C) / -40 to +140 °F (-40 to +60 °C) |
| Operating / Storage humidity | max. 95 %RH (non-condensing) |
| Dimensions | 2.64 x 1.97 x 1.5” (67 x 50 x 38 mm) |
| Weight | approx. 2 oz. (60 g) |
| Protection type | IP20 |
| Approvals | UL File No. E164102, EAC |
² When connecting with stranded wires, wire end ferrules must be used.
| Part. No. | Setting range |
|---|---|
| 01220.0-00 | 35 to 95 %RH |
Dimensioned Drawing
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