Small size, high quality, high precision Made of copper, strong and durable Easy to install, easy to use, can be used as a flow switch Durable structure, long-lasting performance Widely used in the water industry, such as constant temperature water heaters, water purifiers, drinking fountains, etc. The sealing ring adopts a mechanical structure that is loaded up and down and does not leak; The sensor uses high-quality Hall-effect elements and is encapsulated with glue to prevent water from entering. It is an excellent sensor with high precision, long life and stable performance. Interface size: 4 points (G1/2) Working voltage range: DC5-18V Water pressure resistance: less than equal 1.75MPa Output pulse high level: Greater than DC4.7V (input voltage DC5V) Output pulse duty cycle: 50%10% Insulation resistance: Greater than 100MQ Tightness: Close each hole, add 1.7Mpa water pressure test for 1 minute without leakage or deformation Inner diameter/outer diameter: inner diameter 15.4 water outlet 13.5mm/ outer diameter 20.5mm Thread length: 9.3mm size:44x30mm Material:copper colour:Gold Package Contents: 1 * water flow sensor