The electromechanical hygrostat MRF012 is designed to control enclosure heaters to raise the dew point when a critical relative humidity of 65% is exceeded, effectively preventing condensation and corrosion.Specifications: Switch difference: 4% RH (3% tolerance) Permissible velocity: 15 m/sec Contact type: change-over contact Contact resistance: 100,000 cycles Minimum switching capacity: 20 V AC / 100 mA for DC Maximum switching capacity: 250 VAC, 5 (1) A for DC 20 W EMC: according to EN 55014-1-2, EN 61000-3-2, EN 61000-3-3 Connection: 3-pole terminal for 2.5 mm, clamping torque 0.5 Nm max.; rigid wire 2.5 mm, stranded wire (with wire end ferrule) 1.5 mm Mounting: clip for 35 mm DIN rail, EN 50022 Casing: plastic according to UL94 V-0, light grey Dimensions: 67 x 50 x 38 mm Fitting position: variable Operating/Storage temperature: 0 to +60C (+32 to +140F) / -20 to +80C (-4 to +176F) Protection type: IP20 Note: Item color displayed in photos may appear slightly different on your computer monitor as monitors are not calibrated identically. Please allow 1-3 mm slight deviation due to manual measurement. Package includes: 1 pc Humidity Controller