The Piston Type Plastic Water Flow Switch Sensor (White) is a compact and reliable liquid flow detection sensor designed to monitor the presence and movement of water in closed circulation systems. Built with a piston-actuated design, it provides dependable on/off switching based on flow rate — making it ideal for CO₂ laser engraving and cutting machines, water coolers, pumps, aquariums, and other water-cooled systems.

When water flows through the sensor past a minimum threshold, the internal piston moves and actuates a microswitch, sending a digital signal that can be used to enable/disable power, trigger alarms, or interface with machine control logic for safe operation and protection.

Features

• Piston-type mechanism: Accurate and reliable flow actuation
• Plastic body: Lightweight, corrosion-resistant and suitable for water systems
• Compact design: Easy to install in tight tubing layouts
• Dry-contact output: Simple microswitch output for control systems
• No power required: Passive flow switch (signal only)
• Protection for devices: Prevents operation without sufficient coolant flow
• Ideal for laser machines: Ensures safe operation of CO₂ laser tubes and water-cooled components

Specifications

• Type: Piston-type water flow switch sensor
• Body Material: Plastic (white)
• Mounting: Inline installation in water line
• Connection: Hose/tubing fitting (model dependent; often barbed for silicone/PU tube)
• Switch Output: Mechanical dry contact (SPST)
• Activation Flow Rate: Typically ~1.5 – 2.5 L/min (varies by model)
• Operating Temperature: ~0 – 80 °C (water)
• Pressure Rating: Moderate (suitable for low-pressure cooling circuits)
• Compatibility: Water and coolant lines in laser cutters, CNC machines, and pumps

Applications

• Safety interlock for CO₂ laser engraving and cutting machines
• Water-cooling systems on CNC machines and routers
• Cooler systems, aquariums, and pumps
• Industrial and hobby liquid circulation monitoring
• Alarms and interlock systems for thermal protection