SEN-HZ21WA G1/2 Water Flow Sensor Nylo

SEN-HZ21WA G1/2 Water Flow Sensor Nylon Flow Meter (Technical Information)

Overview

The SEN-HZ21WA water flow sensor is a turbine-based liquid flow sensor designed to measure the flow rate of water in pipelines.

• Measures:

  • Water flow rate (L/min)

   

• Output:

  • Digital pulse signal

   

• Type:

  • Hall-effect based flow sensor

   

It is widely used for real-time water flow monitoring systems.

Working Principle

Turbine + Hall Effect Sensing

1. Fluid Flow Movement

• Water enters the sensor body

• Rotates an internal turbine (impeller)

2. Magnetic Detectii

A Hall-effect sensor detects rotation

3. Pulse Generation

• Each rotation produces electrical pulses

• Pulse frequency is proportional to flow rate

Flow Equation

F=10Q (10%)F = 10Q \ (\pm 10\%)F=10Q (10%)

• F = frequency (Hz)

• Q = flow rate (L/min)

Higher flow higher pulse frequency.

Measurement Characteristics

• Flow range: 1 to 30 L/min

• Start flow: ~low flow threshold (~1 L/min typical)

• Accuracy: 10% (approx.)

• Pulse output relation:

  • ~516 pulses per liter

   

Electrical Characteristics

• Operaturrent consumption: 15 mA

• Output:

  • Digital pulse (square wave)

   

Output Interface

Pulse Output

• Each pulse corresponds to a small volume of water

• Microcontroller counts pulses to calculate:

  • Flow rate

  • Total volume

   

Signal Characteristics

• TTL-level output

• Duty cycle ~50%

Internal Structure

• Nylon body housing

• Turbine (rotor/impeller)

• Embedded magnet

• Hall-effect sensor

• Signal conditioning circuit

Sensor electronics are isolated from water path.

Mechanical Characteristics

• Thread fitting)

• Material: Nylon (PA66)

• Max pressure: ~1.75 MPa

• Fluid type: Clean water (non-corrosive)

Operating Behavior

Flow Measurement

• Flow increases turbine spins faster more pulses

Real-Time Monitoring

• Continuous pulse output enables:

  • Instant flow calculation

  • Total volume tracking

Low Pressure Start

• Can operate at relatively low water pressure

Environmental Characteristics

• Suitable for:

  • Water systems (60C typical)

• Not suitable for:

  • High-temperature liquids

  • Corrosive fluids

Limitatio>

Calibration

Sensitive to:

• Air bubbles

• Debris in water

Not suitable for:

• Very low flow rates (below threshold)

Measures:

• Flow only (not pressure or level)

Typical Pin Configuration

• Red VCC (5V)

• Black GND

• Yellow Pulse output

Functional Role

The sensor acts as a:

• Water flow rate sensor

• Volume measurement device

• Digital pulse-based flow meter

Summary

The SEN-HZ21WA G1/2 Nylon Flow Sensor is a turbine-based flow measurement device that:

• Usesn

• Measures 130 L/min water flow

• Provides digital pulse output

• Supports real-time flow and volume calculation

• Is designed for pipeline integration with standard G1/2 threads