YF-S201 Flow Meter
- YF-S201 water flow sensor with an internal Hall-effect turbine for measuring the flow rate of water and other compatible liquids.
- Provides a pulse output proportional to the liquid flow, making it easy to interface with Arduino, ESP32 and other microcontrollers.
- Ideal for water-flow monitoring, automatic dispensing, irrigation systems, smart-home projects and liquid measurement applications.
SKU: yf-s201-flow-meter
YF-S201 Water Flow Sensor
The YF-S201 is a compact Hall-effect water flow sensor designed to measure the flow rate of liquid passing through its internal turbine. As water flows through the sensor, the turbine rotates and generates electrical pulses using an integrated Hall-effect sensor.
The pulse frequency is proportional to the flow rate, allowing a microcontroller to calculate flow rate and accumulated volume through software. Its simple pulse-output interface makes the sensor easy to integrate with Arduino, ESP32, Raspberry Pi and other control systems.
The YF-S201 is commonly used in water dispensers, irrigation systems, automated filling equipment, liquid monitoring systems, aquarium projects, smart-home applications and other projects requiring real-time water-flow measurement.
| Product Type | Water / Liquid Flow Sensor |
|---|---|
| Model | YF-S201 |
| Sensing Technology | Hall-effect turbine flow sensing |
| Flow Range | Approximately 1–30 L/min |
| Output | Pulse / frequency output proportional to flow rate |
| Interface | Digital pulse output |
| Supply Voltage | 5–18V DC |
| Typical Current Consumption | Approximately 15 mA maximum |
| Flow Coefficient | Approximately 450 pulses per litre |
| Connection Size | 1/2 inch threaded water connection |
| Measured Quantity | Liquid flow rate and accumulated volume |
| Applications | Water monitoring, irrigation, dispensers, filling systems, aquariums and smart-home projects |
| Compatible Platforms | Arduino, ESP32, Raspberry Pi and other microcontrollers with digital input |
| Sensor Type | Digital Hall-effect flow sensor |
