This Liquid Water Level Sensor can be used to detect the liquid levle in tank/container.Non-contact, works without direct contact with the liquid inside the tank.Tiny in size, easy to install.Size:30 x 19 x 10mm/1.18 Inch x 0.75 Inch x 0.39 InchWorking voltage:DC5V or 12-24VMaximum output:30mAResponce time:0.5 SecWorking environment:0Degrees Celsius to 60Degrees Celsius.Sense distance:10mmApplication:Household appliances products, sanitary wares intelligent control products, drinking & cleaning water and water treatment equipments, treatment and foodstuff mechanism equipments, chemical mechanism equipments and so on.Connection and Diagram:Black:GNDWhite:OutputRed:VCCmaterial:plasticcolour:blackPackage Included:5 x Non-contact Tank Liquid Water Level Sensor Switch5 x Bracket(just for flat surface)Only the above package content, other products are not included.Note: Light shooting 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.