HFS-20 DN20 Water Flow Paddle Switch, SPDT Contacts, 6-380V, Partially Stainless Steel

Welcome to our shop! This HFS-20 water flow sensor is a reliable device designed to monitor the dynamic state of liquids flowing in a pipeline. It is perfectly suited for fluids such as water, ethylene, ethylene glycol, and other liquids that do not corrode copper. Main function: When the flow rate exceeds a predefined value, the fluid activates a paddle, which in turn actuates a microswitch. This SPDT (single-pole double-throw) type switch closes one electrical circuit while opening another, thus triggering an action in your system. Its technical features include an adjustable flow control value with a stable actuation point, ensuring high reliability. With an IP54 protection rating, it is resistant to water splashes and dust. The lifespan of its microswitch contacts is impressive, reaching up to 100,000 cycles. This product is ideal for integration into water treatment systems, central air conditioning, or water chillers. Detailed Specifications: - Model: HFS-20 - Switch Type: SPDT - Materials: 304 stainless steel body, copper fitting, phosphor bronze bellows - Weight: Approx. 401 g / 14.1 oz - Connection: 3/4" - Maximum Working Pressure: 1.0 MPa - Ambient Temperature: 0 ~ 60 °C - Liquid Temperature: -10 ~ 100 °C - Microswitch Life: 100,000 cycles - Microswitch Voltage: 220 V AC - Microswitch Current: 15 A Your order includes: 1 x Water Flow Sensor 3 x Paddles 1 x User Manual For optimal installation and operation, please follow the instructions in the manual and note the important points regarding mounting, wiring, and specific operating conditions (by For example, avoid installation in pipes where the liquid flows downwards or at temperatures below freezing.