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 Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!