1/2 Inch Water Flow Sensor – YF-S201 Hall Effect (1–30L/min)

The 1/2 Inch Water Flow Sensor – YF-S201 Hall Effect (1–30L/min) is a high-precision liquid flow sensor designed for measuring water flow in a variety of DIY, industrial, and home automation systems. It operates by generating a pulse output through a Hall effect sensor each time the internal rotor spins, allowing for accurate monitoring of flow rate in real time.

This compact sensor is ideal for water dispensers, irrigation systems, beverage machines, and water heaters. The YF-S201 sensor offers excellent sensitivity, reliable performance, and is easy to integrate with Arduino, Raspberry Pi, and microcontroller projects.

🔧 Key Features

• Reliable 1/2-inch YF-S201 water flow sensor
• Supports flow rates from 1 to 30 liters per minute
• Hall effect sensor for accurate pulse output
• Durable ABS plastic housing with internal rotor
• Pulse signal output: ~4.5 Hz per L/min
• Low-pressure drop and high corrosion resistance
• Compatible with Arduino, ESP32, Raspberry Pi, and more
• 3-wire interface: Red (VCC), Black (GND), Yellow (Signal)

📐 Technical Specifications

📌 Applications

• Home water flow monitoring systems
• Smart irrigation and gardening automation
• Beverage dispensers and coffee machines
• Arduino or microcontroller-based fluid tracking

💡 Why Choose the YF-S201 Flow Sensor?

The YF-S201 Hall Effect Water Flow Sensor delivers accurate, real-time flow data with a simple interface. Whether you’re building an automatic irrigation system or need a cost-effective fluid sensor for your DIY project, this module ensures both performance and value.

📦 Package Includes

• 1 × YF-S201 1/2 Inch Water Flow Sensor