Float Sensor Liquid Mini Water Level Sensor Controller Switch for Solar Energy / Item Type: Float Sensor Switch Size: Approx. 113 x 17 x 56mm / 4.4 x 0.7 x 2.2in  The product is mainly composed of a magnetic reed switch box float. There is magnetic material in the float. When the float moves up and down with the magnetic liquid level, the magnetic reed switch is triggered to detect the liquid level position. The liquid level sensor uses imported switch elements. Simple working principle, high reliability. Water machine, water heater, solar energy, air conditioner, humidifier, bathroom equipment, sales machine, mailbox water tower, etc. It is also widely used in automobiles, industrial equipment, agricultural equipment and household appliances.