YF-S201 Water Flow Sensor

YF‑S201 Water Flow Sensor – a compact, hall‑effect flow meter that measures the real‑time volume of liquid moving through a 1/2‑inch pipe (0‑30 L/min). The sensor’s stainless‑steel body and transparent housing let students see the fluid while the embedded magnet and reed switch generate a pulse train proportional to flow rate, which can be read directly by any Arduino, Raspberry Pi, or micro‑controller compatible board.

Working with the YF‑S201 gives learners hands‑on experience in fluid dynamics, data acquisition, and signal processing. Students will program the sensor to calculate instantaneous flow, total volume, and even detect leaks or blockages, then visualize the data with charts or integrate it into automated irrigation, smart‑home, or robotics projects. The kit also introduces concepts of magnetic field sensing, pulse‑width modulation, and calibration techniques, reinforcing math, physics, and coding skills.

Key Features

• Measurement range: 1 – 30 L/min (0.3 – 5 m³/h) with ±5 % accuracy
• Wide operating voltage: 5 V – 24 V DC
• Easy‑to‑use three‑wire interface (VCC, GND, Signal)
• Low power consumption and built‑in temperature compensation
• Robust ABS housing and corrosion‑resistant stainless‑steel tube

Because the sensor bridges science (fluid mechanics), technology (micro‑controller integration), engineering (system design), art (data visualization), and mathematics (rate calculations), it’s an ideal STEAM tool. Its plug‑and‑play design lets students prototype quickly, iterate designs, and see immediate, tangible results turning abstract concepts into real‑world solutions.