A float switch is a device used to sense the level of liquid within a tank, it may actuate a pump, an indicator, an alarm, or other device.Use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for head control, pet bowls, fish tanks, filtration, heating, or what ever your project may be3pcs Tank Pool Horizontal Water Level Switch Liquid Level Sensor Liquid PP Plastic Ball Float SwitchFeatures:.Contract rating (Max): 10WSwitching voltage (Max): 110VDC/ACSwitching current (Max): 0.5ABreakdown voltage (Max): 220VDC/ACCarry current (Max): 1AContract resistance (Max): 100 OHMTemperature rating: -10 ~ +60 Celsius degreecolour:BlackMaterial:metalsize:Cable length: 40cm, float length: 8.5cmPackage Contents:3 x Liquid Level SensorOnly 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.