🔧 Key Specifications & Features 📊 General Operation Measures the flow rate of

🔧 Key Specifications & Features
📊 General Operation
Measures the flow rate of water by counting pulses from an internal Hall‑effect sensor as the paddlewheel turns with liquid flow.
Outputs digital pulse signals — easy to interface with microcontrollers like Arduino, ESP32, Raspberry Pi, PLCs, etc., by counting pulses per unit time.
💧 Fluid & Environmental Specs
Fluid type: Clean water (suitable for potable water per drinking standards).
Temperature range: 0 – 80 °C (approx).
Housing material: Brass body (good corrosion resistance).
Max operating pressure: ≤ 1.75 MPa (some listings show ~1.2 MPa).
⚙️ Electrical & Signal
Supply voltage: DC 4.5 V – 18 V (typical logic 5 V).
Current draw: ≤ 15 mA.
Output: Digital pulse (Yellow wire).
Connector: 3‑pin JST (Red = Vcc, Black = GND, Yellow = Pulse).
Pulse duty cycle: ~50 %.
📈 Flow Characteristics
Flow range: ~0.35 – 3.0 L/min.
Flow to pulse relation: ~1 L of water ≈ 1780 pulses.
Flow equation: F (Hz) = 73 × Q (L/min) ± ~10 %.
This means as flow increases, pulse frequency increases proportionally, letting your controller convert pulses to flow rate.
📌 How It Works (Principle)
The sensor contains a small rotor with a magnet placed inside the brass body. As water flows through, the rotor spins. A Hall‑effect sensor detects the passing magnet and outputs a pulse each revolution. Counting pulses over time lets you compute flow and total volume.
📍 Typical Applications
Water purification & dispensers.
Coffee machines and vending systems.
Thermostatic water heaters.
Smart metering and embedded measurement systems.
Irrigation or small fluid flow monitoring systems.
🧠 Integration Tips
🛠 Installation
Install after a filter to avoid debris jamming the rotor.
Avoid areas with strong vibrations, which can affect pulse accuracy.
🧠 Reading the Sensor (with a Microcontroller)
Connect Yellow pulse pin to a digital interrupt pin.
Count pulses per time interval (e.g., per second) to compute flow rate.
Example formula:
Flow (L/min)=Pulses in 1 sec×601780\text{Flow (L/min)} = \frac{\text{Pulses in 1 sec} \times 60}{1780}Flow (L/min)=1780Pulses in 1 sec×60​
Use debouncing or digital interrupts to improve counting accuracy if water turbulence causes noisy pulses.