Description: Hall operating principle, pulse signal output. Small size for easy installation. Type: G1/4"(External Thread Diameter) Working voltage: DC4.5-18V Rating voltage/current: DC5V, ?15mA Electrical strength: AC500V, 50Hz Minimum startup flow: 0.3L/min Maximum flow: 3.0L/min Pressure: 1.2mpa Specification: Switch Length: 60mm/2.4inch Cable Length: 230mm/9inch Hole Diameter: 10mm/0.4inch Material: Plastic Package Includes: 1 Piece Water Flow Sensor Switch