Features HIGH PRECISION SWITCH: High sensitivity water flow control switch, minimum starting flow (0.01Mpa): ≦ 0.8L/min, normal working pressure: ≦ 0.8Mpa FEATURES: Maximum bearing pressure: ≦1.5Mpa, water inlet and outlet thread interface: G1/2, installation method: installation at any angle. WATER FLOW INDICATOR: The water flow switch, also known as a flow switch, or a water flow sensor or indicator, is a water induction switch that outputs a switch signal by monitoring the presence or absence of water flow, mainly including a switch signal. It is divided into normally open and normally closed types, and the main worker plays a role in water flow monitoring in water contro STABLE IN WORKING: Water flow sensor is a water flow sensing instrument that outputs pulse signals or signals such as current and voltage by sensing water flow. The output of this signal is linearly proportional to water flow, and there are corresponding conversion formulas and comparison curves. INSTALLTAION: There is an arrow in the sensor that indicates the direction of the water flow so sensor should be installed in that direction. The flow direction depend on the pitch of the blades to market the switch work properly or if it’s a single blade the direction depends on the direction of the blade needs to be pushed Description: Water flow switch is a very important part in the instant water heater. When there is a certain water flow through inlet, electric circuits is connected and water heater begin to heat. When the water flow stops, the water heater stops working. Magnetic type water flow switch controls switching on and off through the magnet, which is safe and reliable. Specifications: Model: EFS-04P  Color: Black Current: 3A Voltage: 220V Power: 10W Pipe Thread Size: G1/2" (BSP) Diameter: 2cm Ambient Temperature: ≥1°C Operating Temperature: ≤100°C Rated Pressure: ≤0.65Mpa  Max. Pressure: ≤1.5Mpa  Size: 2 x 5.2cm / 0.78 x 2.04" Weight: 26g(approx.) Package Includes: 1 x Switch  Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List