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. Switch difference:4 percent RH (3 percent tolerance) Permissible velocity:15m or sec Contact type:change-over contact Contact resistance:100 000 cycles Min.switching capacity:20V AC or for DC 100 mA Max.switching capacity:250 VAC, 5 (1) A for DC 20W EMC:acc.to EN 55014-1-2, EN 61000-3-2, EN 61000-3-3 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, EN50022 Casing:plastic according to UL94 V-0, light grey Fitting position:variable Operarting or Storage temperature:0 to and6(and32 to and140) or -20 to and80(-4 to and176) for Protection type:IP20 Note:Due to different production batches, there may be slight color difference or difference in the actual product, which will not affect the use. Colour:As Shown Material:Plastic Size:67x50x38mm Package Contents: 1 x Humidity Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.