YF-S201 Arduino Water Flow Sensor

The YF-S201 Arduino Water Flow Sensor is a precision Hall effect sensor module designed to measure the flow rate of water and other non-corrosive liquids. It outputs a digital pulse signal, which can be easily interfaced with Arduino, Raspberry Pi, NodeMCU, and other microcontrollers for real-time monitoring.

With a flow range of 1–30 liters per minute, the YF-S201 is widely used in IoT smart water systems, irrigation control, industrial water measurement, home appliances, and DIY projects. Its compact design and durable plastic body make it reliable for both hobby and professional use.

🔹 Key Features

• Flow Range: 1 – 30 L/min

• Hall Effect Sensor: Provides digital pulse output proportional to flow rate

• Easy Interfacing: Works with Arduino, Raspberry Pi, and microcontrollers

• Durable Design: Plastic body resistant to moisture and rust

• High Accuracy: Stable and consistent flow measurement

🔹 Technical Specifications

• Model: YF-S201

• Working Voltage: 5V – 18V DC

• Maximum Current: 15 mA (at 5V)

• Flow Range: 1 – 30 L/min

• Operating Pressure: ≤1.75 MPa

• Output Type: Digital pulse (frequency proportional to flow)

• Output Duty Cycle: 50% ± 10%

• Connector: 3-pin (VCC, GND, Signal)

• Material: Engineering plastic with stainless steel balls

• Thread Size: 1/2 inch

🔹 Applications & Use Cases

• Arduino & Raspberry Pi water monitoring projects

• Smart Irrigation Systems

• IoT Water Flow Monitoring

• Industrial & Laboratory Fluid Measurement

• Home Appliances – water dispensers, washing machines, coffee machines

• DIY Water Control Projects

🔹 Advantages for Makers & Engineers

• Direct integration with Arduino and Accessories.

• Pairs with Electronics Components for smart automation projects.

• Low-cost, reliable solution for water measurement and IoT applications.

🔹 Safety & Precautions

• Use only with non-corrosive liquids (not suitable for strong acids/alkalis).

• Ensure water pressure does not exceed 1.75 MPa.

• Filter input water to avoid clogging by debris.

• Calibrate pulse output for accurate flow rate measurements.

🔗 Helpful Internal Links

• Explore more Sensors for IoT projects

• Find compatible Arduino Boards

🎥 Video Tutorial

[YouTube tutorial link here]

📝 Product Summary

The YF-S201 Water Flow Sensor is a Hall effect-based liquid flow measurement sensor with a range of 1–30 L/min. Easy to interface with Arduino, Raspberry Pi, and IoT systems, it is widely used in smart irrigation, water monitoring, industrial automation, and home appliances.