Small size, high quality, high precision Made of copper, strong and Easy to install, easy to use, can be used as a flow switch structure, long-lasting performance Widely used in the water industry, such as constant temperature , 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, 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: DC4.7V (input voltage DC5V) Output pulse duty cycle: 50%±10% Insulation resistance: 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: 2 * water flow sensor Only 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.