Description
YF-S201 is a water flow measurement sensor with high-grade quality sealing property. It works on the Hall magnetic effect principle and with a flow rate range of 1~30L/min. So when the water flows through the rotor assembly, the rotor will rotate, and the hall effect sensor will produce an electric pulse. By counting these generated pulses, the amount of water passing through the sensor can be calculated.
The module has three pins: Power, Ground, and the Analog output. YF-S201 consumes very little current and can work with an allowing pressure of ≤1.75MPa. The color of this sensor is white.
Features of YF – S201
- Operating Voltage: 4.5V to 18V DC
- Output type: 5V TTL
- Maximum current draw: 15mA at 5V
- The sensor used: Hall Effect
- Working Flow rate: 1 to 30 Liters/Minute
- Accuracy: ±10%
- Pulses per Liter: 450
- Output duty cycle: 50% +-10%
- Maximum water pressure: 2.0 MPa
- Flow rate pulse characteristics: Frequency (Hz) = 7.5 * Flow rate (L/min)
Pin configuration of YF-S201
YF – S201 has 3 Pins for power and the output. The table below explains the color, pin type, and function of the pin.
| Color | Pin type | Function |
| Red | Power | To provide power to the module. |
| Black | Ground | Connected to the ground terminal. |
| Yellow | Signal | Analog output from the sensor |
For more information the documentation is here
