G1/2 type water sensor, its maximum water pressure is 1.75MPa, the range of is from 1L/min to 30L/min. Three wire connection: Red for positive pole, black for negative pole, yellow for pulse There is an integrated hall effect sensor that outputs an electrical pulse with every revolution. The hall effect sensor is sealed from the water pipe and allows the sensor to stay safe and dry Made of high-quality copper material, environmental-friendly, really sturdy and to use Lightweight, reasonable size, stable performance, low water pressure start, easy to install, safe to use Can be perfectly used for water heaters, water dispenser, water purifier, water vending machine, coffee maker, measurement device, water control machine and so on, Weight: 0.1543235834 pounds, Manufacturer: Raguso