YF-S201 1/2 Inch Water Flow Sensor – Hall Effect Flow Meter for Arduino, ESP32 & IoT Projects

The YF-S201 1/2 Inch Water Flow Sensor is a reliable and cost-effective solution for measuring liquid flow in water monitoring and IoT-based automation systems. It works on the Hall Effect principle, where an internal rotor with a magnet generates pulses proportional to the water flow rate, allowing accurate measurement of flow in liters per minute.

This sensor is widely used in DIY electronics, smart irrigation systems, water dispensers, and industrial flow monitoring projects. It is compatible with popular development platforms like Arduino boards and can also be integrated with microcontrollers such as ESP32 microcontroller for IoT applications and cloud-based monitoring.

With its simple 3-wire interface (VCC, GND, and signal output), the YF-S201 can be easily connected to any digital input pin. The pulse output can be read and converted into real-time flow rate data using simple programming.

Key Features:

• 1/2 inch standard water inlet/outlet
• Hall effect-based pulse output for accurate measurement
• Flow range suitable for home and industrial use
• Easy integration with microcontrollers
• Durable plastic body for long service life

This sensor is ideal for smart water management systems, leakage detection, automated billing systems, and IoT projects under the Vihaan IoT Gateway ecosystem.