The electromechanical hygrostat MRF012 is designed to control enclosure heaters ,so that the dew point is raised when a critical relative humidity of 65 percent is exceeded. In this way condensation and corrosion is effectively prevented. Specifications:Switch difference:4 percent RH (3 percent tolerance)Permissible velocity:15m or secContact type:change-over contactContact resistance: 100 000 cyclesMin. switching capacity: 20V AC or for DC 100 mAMax. switching capacity: 250 VAC,5 (1) A for DC 20WEMC: acc. to EN 55014-1-2,EN 61000-3-2,EN 61000-3-3Connection:3-pole terminal for 2.5mm2<br> ,clamping torque 0.5Nm max.: rigid wire 2.5mm2<br> ,stranded wire (with wire end ferrule) 1.5mm2<br> Mounting: clip for 35mm DIN rail,EN50022Casing: plastic according to UL94 V-0,light greyDimensions: 67 x 50 x 38mmFitting position: variableOperarting or Storage temperature: 0 to and60C (and32 to and140F) or -20 to and80C (-4 to and176F)for Protection type: IP20 Note:Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.Please allow 1-3mm slight deviation due to manual measurement. Thank you Package include:1pc Humidity Controller