The water flow sensor is designed for the inlet of a water heater and is composed of a plastic valve body, a water flow rotor assembly, a steady flow assembly, and a Hall element. It is installed at the water inlet end to detect the inlet flow rate. As water passes through the rotor assembly, the magnetic rotor turns and its speed changes linearly with the flow rate. The Hall sensor outputs a pulse signal that feeds back to the controller, which then judges the flow size and regulates it. Key benefits - Real-time, linear flow measurement at the water heater inlet - Closed-loop regulation through feedback to the controller for precise inlet flow - Simple, robust construction with a plastic valve body - Direct integration with the heater’s control system via the Hall element Attributes - Function: detects inlet water flow rate, provides pulse signal to controller, enabling flow regulation - Compatibility: installed at the water inlet end of the water heater - Material: plastic valve body - Performance: linear relationship between rotor speed and flow rate; pulse output to controller Use scenarios - Residential tankless water heater: maintain stable inlet flow to ensure consistent outlet temperature - Solar or heat-pump water heaters: regulate inlet flow for efficient operation and protection of heating elements - Smart plumbing or commercial water heaters: real-time flow monitoring and automatic regulation to support energy management and system safety