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The YF-S201 Water Flow Sensor consists of a high-quality plastic valve body, a water rotor, and a Hall-effect sensor. As water flows through the 1/2″ inlet, the rotor turns, and the Hall-effect sensor outputs a corresponding pulse signal. This pulse frequency changes with the speed of the flow, allowing your microcontroller (Arduino, ESP32, or Raspberry Pi) to calculate the exact flow rate in Liters per minute. It is robust, easy to install, and ideal for liquid monitoring applications
Precise Measurement: High-frequency pulse output for accurate tracking of water usage.
Industry Standard Fitting: Features a 1/2″ DN15 pipe thread, making it compatible with standard Pakistani plumbing fixtures.
Low Power & Safe: Operates on 5V to 18V DC, drawing very little current during operation.
Durable Build: High-quality internal stainless steel axis for the rotor ensures a long service life and minimal wear.
Simple Interface: 3-wire connection (Power, Ground, Pulse Output) for quick setup.
| Feature | Specification |
| Model | YF-S201 |
| Operating Voltage | 5V to 18V DC |
| Max Current | 15 mA (at 5V) |
| Flow Rate Range | 1 to 30 Liters/Minute |
| Pipe Connection | 1/2″ (DN15) |
| Max Water Pressure | 1.75 MPa (Approx. 250 PSI) |
| Operating Temp | ≤ 80°C |
| Accuracy | ±10% |
| Pulse Frequency | $f = 7.5 \times Q$ (Q is flow rate in L/min) |
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