1/2 Inch Brass Water Flow Sensor SEN-HZ21WI

💧 1/2 Inch Brass Water Flow Sensor – SEN-HZ21WI
🧩 Overview
Measures liquid flow rate in pipes
1/2 inch brass body for durability
Compatible with Arduino, ESP32, Raspberry Pi, and other microcontrollers
Ideal for water dispensers, irrigation, and DIY projects
⚙️ Working Principle
Water passes through a turbine rotor inside the sensor
Rotor spins proportional to flow rate
Hall-effect sensor generates pulses for each rotation
Microcontroller counts pulses → calculates flow rate (L/min)
📊 Key Specifications
🔹 Pipe Size: 1/2 inch (DN15)
🔹 Working Voltage: 5–24V DC
🔹 Output Type: Digital pulse (Hall effect)
🔹 Flow Range: 1–30 L/min
🔹 Working Pressure: < 1.75 MPa
🔹 Temperature Range: 0–80°C
🔹 Pulse Output: 450 pulses/L (approx.)
🔹 Material: Brass body + plastic rotor
🧱 Module Components
Brass housing
Plastic turbine rotor
Hall-effect sensor
Three wires: Red (VCC), Black (GND), Yellow (Signal)
🔄 Features
Accurate real-time flow measurement
Durable brass construction → resistant to corrosion
Easy to interface with Arduino / ESP32 / Raspberry Pi
Compact and reliable
🛠️ Applications
Water dispensers 💧
Home or industrial irrigation systems 🌱
Flow monitoring in DIY water projects
Smart faucets & automated water systems
Aquarium water management
⚠️ Usage Tips
Install inline with water pipe, respecting flow direction
Avoid dry running (can damage rotor)
Use filtered water to prevent debris from jamming rotor
Ensure proper wiring for pulse output
✅ Advantages
High durability (brass body)
Easy digital interface for microcontrollers
Wide flow range (1–30 L/min)
Reliable & low maintenance
⚠️ Limitations
Accuracy affected by turbulent or bubbly water
Requires straight pipe section before and after sensor for stable reading
Not suitable for high-pressure industrial fluids (>1.75 MPa)