Fangrui Product Details 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*19*10mm/1.18*0.75*0.39 Working Voltage:dc5v Or 12-24v Maximum Output:30ma Responce Time:0.5 Sec Working Environment:0degrees Celsius To 60degrees Celsius. Sense Distance:10mm Application: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:gnd White:output Red:vcc Material:plastic Colour:black Package Included:1 X Non-contact Tank Liquid Water Level Sensor Switch 1 X Bracket(just For Flat Surface) 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.