... 4.Certificates: CE, RoHS,FDA Level Switch Characters:1.Low cost: cheap material2.long life:>1000000 times3 ... 1254.Certificates: CE, RoHS,FDAMovement Explaination:A float switch is a device used to sense the level ... circuit, this will send the control board a signal that the liquid level is at the ... air-cooler, BSD-P, humidifier, dehumidifier,fluid control,a pump,an indicator,an alarm,or other device. If ...