Description:

The YF-S201 Water Flow Sensor is a reliable Hall-effect flow meter designed to measure water flow rates from 1 to 30 L/min. Featuring a G1/2″ threaded connection and pulse output, it is easy to interface with Arduino, ESP32, Raspberry Pi, and other microcontrollers. Ideal for water monitoring, smart irrigation, automation, and IoT projects.

Specifications:

• Model: YF-S201
• Sensor Type: Hall-effect water flow sensor
• Measuring Range: 130 L/min
• Operating Voltage: ~5 ~ 18 V DC
• Thread Size: G1/2″ (1/2-inch BSP)
• Color: Black
• Pulse Constant: ~450 pulses per liter
• Wire Interface: 3-wire: VCC, GND, Pulse Signal
• Operating Temperature: Up to ~80C
• Compatibility: Arduino, ESP32, Raspberry Pi, NodeMCU, STM32, AVR, PIC, and other MCU platforms

Features:

• Accurate Flow Measurement Detects water flow from 130 L/min.
• Hall-Effect Technology Provides reliable pulse output signals.
• G1/2″ Threaded Port Easy integration into water pipelines.
• Wide Voltage Support Operates from 5V to 18V DC.
• Microcontroller Compatible Works with Arduino, ESP32, Raspberry Pi, and more.
• Low Power Consumption Suitable for continuous monitoring applications.
• Easy 3-Wire Interface Quick and simple connection setup.
• Durable Construction Designed for long-term water flow monitoring.
• Real-Time Flow Sensing Ideal for automation and IoT projects.
• Versatile Applications Perfect for irrigation, water dispensers, and smart water systems.

Connection:

• Red Wire: +5V
• Black Wire: GND
• Yellow Wire: PWM output

Note: The YF-S201 Water Flow Sensor isn’t a precision sensor, and the pulse rate does vary a bit depending on the flow rate, fluid pressure, and sensor orientation. It will need careful calibration if better than 10% precision is required. However, its great for basic measurement tasks!

Package Included:

1 x YF-S201 Water Flow Sensor – Black