The mechanical component is isolated from the electronic component. The design does not include bellows, which are prone to failure. All wetted parts are made of reinforced nylon or PPO. PVC external wire connections are optional, and all UPVC tee fittings are compatible. Suitable for use with UPVC piping in seawater or swimming pool heat pump systems. Features an imported magnetic switch as the electrical actuation component. Offers low activation and reset flow rates with minimal pressure drop, ideal for swimming pool heat pumps and other heat pump applications. Adjustable flow protection capability. Designed for gas-liquid dual-purpose use, widely applicable in industrial automation, machinery, air compression systems, and refrigeration and air conditioning systems. The water flow switch magnet is not exposed to the water flow path, allowing reliable operation in sewage systems.