... working temp:-20~+125 4.Certificates: CE, RoHS,FDA Level Switch Characters:1.Low cost: cheap material2.long life:>1000000 ... CE, RoHS,FDAMovement Explaination:A float switch is a device used to sense the level of liquid in a tank.When ... with the water level, the magnet inside the ball will cause the action of the reed switch inside the stem. ... forward to working with you as partners !! Water Level Switch