The Water Flow Sensor FS300A G3/4 is a high-quality liquid flow sensor designed for accurate measurement in medium to high water flow applications. Built with a durable plastic body and an internal rotor, the sensor uses Hall-effect technology to detect the speed of the water flow and convert it into a digital pulse signal. Its G3/4 thread makes it compatible with standard piping systems, ensuring easy installation in residential, industrial, and agricultural setups. This sensor is ideal for monitoring, controlling, and regulating water usage in real-time with microcontrollers like Arduino, ESP32, or Raspberry Pi.
How It Works
The FS300A works by allowing water to pass through its chamber, which rotates the internal turbine. A Hall-effect sensor detects the turbine’s rotation speed and converts it into pulse signals. These pulses are proportional to the water flow rate, allowing microcontrollers or monitoring systems to calculate both instantaneous flow and total water consumption. The design provides stable performance and minimizes clogging or wear, ensuring long-term reliability.
Key Features
G3/4 threaded plastic housing for easy pipe installation
High sensitivity Hall-effect sensor for precise detection
Operating voltage: 5–18V DC for wide compatibility
Flow range: 1–60 L/min, suitable for medium to high water flow
Pulse output proportional to flow rate for easy microcontroller integration
Durable body with good corrosion resistance
Stable operation with low pressure loss
Specifications
| Parameter | Value |
|---|---|
| Model | FS300A G3/4 |
| Operating Voltage | 5–18V DC |
| Max Current | ≤ 15 mA (DC 5V) |
| Flow Rate Range | 1 – 60 L/min |
| Water Pressure | ≤ 1.75 MPa |
| Output Type | Digital pulse signal |
| Accuracy | ±3% |
| Thread Size | G3/4 standard |
| Material | Plastic housing + turbine |
| 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
Smart water meters and residential monitoring
Agricultural irrigation systems
Industrial water flow monitoring
Liquid circulation systems
Water dispensers and purification systems
Cooling and heating flow measurement
