Our the water flow sensor is made of high quality copper material, very sturdy and durable to use, it is a kind of G1/2" type water flow sensor, its maximum water pressure is 1.75MPa and the flow range is from 1L/min to 30L/min.Lightweight and has compact size, stable performance, low start-up water pressure, very easy to install and safe to use.And that can be perfectly used for water heater, water dispenser, water purifier, automatic water dispenser, coffee maker, flow meter, water control machine and so on. Specifications: Condition: 100% New Material: Copper Color: Shown as picture Type: G1/2" (outer thread diameter), DN20mm Water quality requirement: 60 Starting flow range: 1.5L/min Flow range: 1-30L/min Maximum water pressure: 1.75MPa Working voltage range: DC4.5-18V C Max Current: 10mA Insulation Resistance: 100M Electrical Strength: AC500V, 50Hz Copper Switch Length: Approx. 60mm/2.4inch Wire Length: Approx. 32 Weight: approx. 95g Package Included: 1 x Water Flow Switch FEATURES: This water flow sensor can observe the flow water from the water cooling system, in case the pump stops working and causes overheating. HIGH-QUALITY MATERIAL: Made of high-quality copper, which is environmentally friendly, very sturdy and durable to use. The design is novel, simple and practical, easy to install, small in size and durable. DESIGN: There is a built-in hall sensor that emits an electrical pulse with each revolution. The Hall sensor is sealed by the water pipe and keeps the sensor safe and dry. WATER FLOW: Standard G1/2" thread is widely suitable for most computer cooling hoses or connectors, its maximum water pressure is 1.75 Mpa, flow range is 1L/min to 30L/min. FIELD OF APPLICATION: It can be perfectly usable for water heaters, water dispensers, water purifiers, water vending machines, machines, dosers, cafe water control, etc.