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: Digital pulse (Hall effect)
Flow Range: 130 L/min
Working Pressure: < 1.75 MPa
Temperature Range: 080C
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
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 (130 L/min)
Reliable & low maintenance
Limitations
Accuracy affected by turbulent equires straight pipe section before and after sensor for stable reading
Not suitable for high-pressure industrial fluids (>1.75 MPa)