Water Flow Sensor Transparent YF-S201C
The Water Flow Sensor Transparent YF-S201C is a compact and reliable flow measurement device designed for low to medium water flow applications. Its transparent housing allows visual monitoring of the liquid, making it suitable for educational projects, prototyping, and water quality systems. The sensor uses a Hall-effect sensor to detect the rotation of the turbine inside the chamber, converting flow speed into a digital pulse signal. With its lightweight body, standard 1/2 inch pipe connection, and compatibility with 5V systems, it is ideal for use with microcontrollers like Arduino, ESP8266, ESP32, and Raspberry Pi.
How It Works
When water passes through the sensor chamber, it spins the internal turbine. The Hall-effect sensor detects this rotation and generates pulse signals proportional to the flow rate. A microcontroller can process these pulses to calculate both real-time flow rate (L/min) and total volume of water passed. The transparent casing makes it easy to monitor water quality and flow visually, while also helping with troubleshooting.
Key Features
Transparent housing for easy inspection and monitoring
Compact size, lightweight, and easy installation
Operating voltage: 5–18V DC
Flow rate detection range: 1–30 L/min
Standard 1/2 inch pipe connection for wide compatibility
Hall-effect sensor for stable and precise digital output
Low power consumption for embedded applications
Specifications
| Parameter | Value |
|---|---|
| Model | YF-S201C Transparent |
| Operating Voltage | 5 – 18V DC |
| Max Current | ≤ 15 mA (DC 5V) |
| Flow Range | 1 – 30 L/min |
| Water Pressure | ≤ 1.75 MPa |
| Output Type | Digital pulse signal |
| Accuracy | ±3% |
| Thread Size | 1/2 inch (G1/2) |
| Housing Material | Transparent plastic |
| Connection Type | 3-pin (VCC, GND, Signal) |
Pin Configuration
| Wire Color | Name | Description |
|---|---|---|
| Red | VCC | Power supply (5–18V) – |
| Black | GND | Ground |
| Yellow | Signal | Pulse output |
Applications
Home water flow monitoring
Water filtration and purification systems
DIY smart meters and IoT water tracking projects
Agricultural irrigation monitoring
Aquarium and hydroponics systems
Educational demonstrations and lab experiments
