The item is a professional and practical /4" water flow sensor, which is mainly consists of plastic body, rotor assembly and Hall Current Sensor. It is installed in the hot water inlet end compatible with water flow. When water through the flow rotor assembly, rotor will rotate and will change as the . Hall Current sensor output corresponding and feedback to controller, then the controller will control the flow. It can be used compatible with Water heaters, credit , water vending machine, flow measurement device. Features - Color: mainly black. - Material: durable hard plastic and stainless steel. - and /4" External Thread Water Flow Sensor Hall Flow Sensor Water Control. - Light weight, small size, and easy to install. - Inlaid with stainless steel impeller shaft, durable and wearable. - Seal with the upper and lower compatible withce structure, avoid leakage. - Imported Hall element, adopts pouring sealant to avoid to leak and age. - Applied compatible with water heater, imprinter, automatic water machine, and other flow metering equipment. Specifications - External threads: 3/4". - Minimum working voltage: DC 4.5 5V-24V. - Maximum operating current: 15mA (DC 5V). - Working voltage range: DC 5-18V. - Load capacity: less than or equal to 10mA (DC 5V). - Working temperature range: less than or equal to 80°C. - Working humidity range: 35%~90%RH ( ). range: 1-60L/min. - Working pressure: less than 1.20Mpa. - Storage temperature: -25°C to 80°C. - Storage humidity: 25%-95% RH. Notes 1. shock, and chemical erosion. 2. Non-throwing or hitting. 3. Mounted vertically, should not 5 degrees inclination. 4. Temperature of Medium should not 120°C. Package list: 1 * /4 External Thread Water Flow Sensor Hall Flow Sensor Water Control 1-60 L/min (Black)