Guanhong Technology (Hong Kong) Co., LTD. Is Specialized In Designing And Manufacturing Float Ball Switches, Liquid Level Switch, Magnetic Control Water Flow Switch, Magnetic Door Switch (SMT Door Magnetic Switch, Equipped With Hidden Door Magnetic Switch, Magnetic Switch, Wireless Magnetic Door Switch) Level Sensor, Displacement Meter, Fuel Consumption Meter, Current Sensor, The Temperature And Humidity Sensors, Photoelectric Switch, Temperature Switch, Reed Relay, Magnetic Susceptibility Of PP Foam Float And Infrared Sensors And Other Products Of Research And Development, Production And Sales.