The electromechanical hygrostat MRF012 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.Specifications:Switch difference:4% RH (3% tolerance)Permissible velocity:15m/secContact type:change-over contactContact resistance: 100 000 cyclesMin. switching capacity: 20V AC/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;,clamping torque 0.5Nm max.: rigid wire 2.5mm2;,stranded wire (with wire end ferrule) 1.5mm2;Mounting: clip for 35mm DIN rail,EN50022Casing: plastic according to UL94 V-0,light greyDimensions: 67 x 50 x 38mmFitting position: variableOperarting/Storage temperature: 0 to +60C (+32 to +140F) / -20 to +80C (-4 to +176F)for Protection type: IP20Note: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 youPackage include:1pc Humidity Controller