1/2 inch Water Flow Sensor YF-S201

1/2 inch Water Flow Sensor YF-S201 

The YF-S201 is a 1/2-inch inline water flow sensor designed to measure the flow rate and total volume of water moving through a pipe. Inside the sensor body, a small turbine rotor spins as water flows past. A Hall-effect sensor detects each rotation of the turbine and produces a digital pulse signal that is proportional to the flow speed. By counting these pulses with a microcontroller or controller system, you can calculate how fast the water is flowing and how much has passed through over time. Its compact size and easy installation make it ideal for water automation, monitoring, and pump control systems.

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Features

• Suitable for 1/2-inch (G1/2) inline connections
• Internal turbine rotor and Hall-effect sensor
• Digital pulse output proportional to flow rate
• Simple 3-wire interface
• Lightweight and compact design
• Low power consumption
• Easy to install in water lines
• Works well with microcontrollers such as Arduino, ESP32, Raspberry Pi
• Reliable and low-maintenance operation

Applications

• Water tank monitoring
• Pump control systems
• Irrigation and agriculture systems
• Smart home water automation
• DIY and IoT water projects
• Hydroponics and aquariums
• Water usage tracking
• Dispensers and filtration systems