Description

YF-S201 Water Flow Sensor for Accurate Liquid Flow Measurement

Accurate flow measurement is essential in automation, water management, smart agriculture, laboratory equipment, beverage dispensers, and DIY electronics. The YF-S201 Water Flow Sensor is a Hall effect liquid flow sensor designed to provide stable pulse output for real-time flow monitoring.

Inside the sensor, a precision rotor spins as water passes through the housing. The integrated Hall effect element converts the rotor’s movement into electrical pulse signals that can be read directly by Arduino, ESP32, Raspberry Pi, STM32, PLC controllers, and many other embedded systems.

Designed for engineers, automation developers, educators, and electronics enthusiasts, this sensor offers an affordable yet dependable solution for measuring water consumption, controlling pumps, and monitoring fluid systems.

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Why Choose This Hall Effect Flow Sensor?

Compared with traditional mechanical flow meters, Hall effect technology provides digital pulse output, making integration with microcontrollers fast and straightforward.

Key advantages include:

• Accurate pulse signal output
• Stable Hall effect sensing technology
• Durable engineering plastic housing
• Low power consumption
• Easy installation
• Long service life
• Suitable for continuous monitoring
• Excellent compatibility with embedded controllers

Whether you are building a prototype or deploying an industrial monitoring solution, this sensor offers reliable performance.

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Designed for Arduino and Embedded Development

This sensor integrates easily with many popular development platforms.

Compatible systems include:

• Arduino Uno
• Arduino Nano
• Arduino Mega
• ESP32
• ESP8266
• Raspberry Pi
• STM32
• PLC Controllers
• Industrial Control Systems

The pulse output can be measured using interrupt functions, allowing software to calculate both instantaneous flow rate and total liquid volume.

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Typical Applications

The sensor is suitable for numerous water monitoring applications.

Common projects include:

• Smart water dispensers
• Coffee machines
• Water vending equipment
• Automatic irrigation
• Home automation
• Liquid cooling systems
• Aquarium monitoring
• Laboratory equipment
• Beverage machines
• Water purification equipment
• Flow measurement systems
• DIY electronics projects

Its compact structure makes installation simple while maintaining dependable measurement performance.

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Stable Pulse Output for Reliable Measurement

The Hall effect sensing element produces pulse signals proportional to the water flow rate.

This enables developers to:

• Calculate flow rate
• Measure total water consumption
• Detect pump operation
• Monitor system status
• Trigger alarms when flow stops
• Record usage data

Digital pulse output simplifies software programming and improves overall system reliability.

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Durable Construction for Long-Term Operation

Manufactured from high-strength engineering plastic, the sensor is designed for extended operation under normal water supply conditions.

Features include:

• Corrosion-resistant housing
• Leak-resistant structure
• Lightweight design
• Smooth internal rotor
• Stable magnetic sensing
• Reliable sealing

These characteristics make the sensor suitable for both educational and commercial projects.

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Easy Integration into Electronics Projects

Because the output signal is digital, connecting the sensor requires only three wires:

• VCC
• GND
• Signal Output

Technical Specifications

Developers can quickly connect the sensor to microcontrollers without additional signal conditioning circuits.

Specification	Value
Model	YF-S201
Sensor Type	Hall Effect Water Flow Sensor
Operating Voltage	DC 5V–18V
Operating Current	≤15mA (DC 5V)
Flow Range	1–30 L/min
Working Pressure	≤1.75 MPa
Operating Temperature	≤80°C
Output Signal	Pulse Output
Thread Size	G1/2″
Cable Length	Approx. 15 cm
Housing Material	Engineering Plastic
Application	Water Flow Monitoring

Package Includes

• 1 × YF-S201 Water Flow Sensor

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Learn More

To better understand how Hall effect flow sensors work and how to integrate them into embedded systems, we recommend the following resources:

• Arduino Project Hub – Flow Sensor Projects

https://www.youtube.com/watch?v=xXItEusqqEg

https://www.youtube.com/watch?v=Up12aCDY8AU

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Related Products

You may also be interested in:

Development Boards – Fondyes

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FAQ

Q1. Is the YF-S201 suitable for Arduino?

Yes.  It is widely used with Arduino Uno, Nano, Mega, ESP32, ESP8266, and many other development boards.

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Q2. Can this sensor measure liquids other than water?

The sensor is primarily designed for clean water or non-corrosive liquids. Using aggressive chemicals or viscous fluids is not recommended.

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Q3. How is the hall effect flow sensor rate calculated?

The Hall effect element generates pulse signals proportional to the water flow. The connected controller counts these pulses and converts them into flow rate and total volume using the sensor’s calibration formula.