Our water flow sensor is made of high-quality copper material, very sturdy and durable to use. It is a G1/2" type water flow sensor, with a maximum water pressure of 1.75MPa and a flow range from 1 L/min to 30 L/min. Lightweight and compact, stable performance, low start pressure, very easy to install and safe to use. It can be used perfectly for water heaters, water coolers, water purifiers, water dispensers, coffee makers, flow meters, water control machines, and so on. **Features:** * Made of high-quality copper material, environmentally friendly, very sturdy and durable to use. * G1/2" type water flow sensor, with a maximum water pressure of 1.75MPa, the flow range is from 1 L/min to 30 L/min. * Three-wire connection: Red for positive pole, black for negative pole, yellow for pulse signal. * Built-in Hall effect sensor that provides an electrical pulse with each revolution. The Hall effect sensor is sealed from the water pipe, keeping the sensor safe and dry. * Lightweight, reasonable size, stable performance, low start pressure, easy to install, safe to use. * Can be used perfectly for water heaters, water coolers, water purifiers, water dispensers, coffee makers, flow meters, water control machines, and so on. **Specifications:** * Material: Copper * Color: As the picture shown * Type: G1/2" (thread outer diameter), DN20mm * Water Quality Requirement: ≤60℃ * Start Flow Range: 1.5 L/min * Flow Range: 1-30 L/min * Maximum Water Pressure: 1.75MPa * Max Current: 10mA * Insulation Resistance: ＞100MΩ * Electrical Strength: AC500V, 50Hz * Copper Switch Length: Approx. 60 mm / 2.4 inch * Wire Length: Approx. 35 cm / 13.8 inch * Weight: Approx. 95 g **Package Includes:** * 1 x Water Flow Switch