SKU: SENS-0627
📋 GST Invoice Available

Saier HZ21WB Water Flow Sensor (1–30 L/min, 4.5–18V DC)

₹329.00 (Inclusive of all taxes)
Out of Stock

The Saier HZ21WB is a turbine-based water flow sensor designed for precise flow rate monitoring from 1 to 30 L/min. Operating on a wide 4.5–18V DC supply, it provides both analog and digital output signals, making it compatible with microcontrollers like Arduino, Raspberry Pi, and industrial PLCs for automated liquid control systems.

Features

  • Turbine sensor technology for accurate flow measurement up to 30 L/min.
  • Wide operating voltage range of 4.5–18V DC with low current draw (<15mA).
  • Provides flexible analog or digital output signals for system integration.
  • Durable construction rated for working pressures up to 1.75 MPa.
  • Compact design for easy installation in confined plumbing or machinery spaces.

Out of stock

Description

The Saier HZ21WB Water Flow Sensor employs a precision turbine mechanism that rotates in proportion to the fluid flow rate. This mechanical motion is converted into a corresponding electrical pulse or analog voltage signal, providing real-time flow data. The sensor’s internal circuitry is designed for stable operation across a broad input voltage, ensuring reliable performance in both 5V and 12V systems common in automation.

Built with industrial-grade materials, the sensor body withstands pressures up to 1.75 MPa and features high insulation resistance (>100 MΩ) for safe operation in various liquid environments. Its compact form factor and standard threaded fittings facilitate straightforward integration into existing water lines, heaters, or dispensing equipment, making it a versatile component for flow monitoring and control.

Key Features

  • High-accuracy turbine-based flow sensing with ±10% typical accuracy.
  • Broad compatibility with 3.3V and 5V logic systems via its configurable output.
  • Robust construction ensures long-term reliability in continuous duty applications.
  • Low power consumption design, drawing less than 15mA during operation.
  • Suitable for monitoring both clean liquids and compatible gases.
  • Integrated signal conditioning provides clean digital pulses or analog voltage output.
  • Meets dielectric strength rating of AC500V at 50Hz for enhanced electrical safety.

Applications

  • Flow rate monitoring and control in commercial water dispensers and coffee machines.
  • Liquid consumption measurement in vending machines and medical diagnostic equipment.
  • Integration into home automation systems for smart irrigation or water heater management.
  • Industrial process monitoring for coolant flow in machinery or chemical dosing systems.
  • IoT-based water usage tracking and leak detection in residential or agricultural settings.

Technical Specifications

Model NumberHZ21WB
Flow Rate Range1 to 30 L/min
Operating VoltageDC 4.5 to 18V
Input Current≤ 15 mA
Working Pressure≤ 1.75 MPa
Output SignalAnalog / Digital (Pulse)
High-Level Output Voltage≥ 4.5V (at VDD)
Low-Level Output Voltage≤ 0.5V
Accuracy± 10%
Insulation Resistance> 100 MΩ
Dielectric StrengthAC500V, 50Hz

Frequently Asked Questions

What is the output signal type of the HZ21WB flow sensor?

The HZ21WB provides flexible output options. It can generate a digital pulse signal where the frequency corresponds to the flow rate, or it can provide an analog voltage output proportional to the flow. The high-level output voltage is ≥4.5V when powered at VDD, making it compatible with both 5V and 3.3V microcontroller logic levels.

What is the maximum operating pressure for this sensor?

The sensor is rated for a maximum working water pressure of 1.75 Megapascals (MPa). This equates to approximately 254 psi, which is suitable for most residential plumbing, appliance, and light industrial liquid systems. Ensure your system pressure does not exceed this limit to prevent damage to the internal turbine mechanism.

Can this sensor be used with gases or only liquids?

While primarily designed for liquids like water, the manufacturer indicates suitability for compatible gases as well. For gas applications, ensure the gas is clean, dry, and non-corrosive to the sensor's internal materials. Calibration and flow characteristics for gases may differ from the specified liquid performance, so testing under your specific conditions is recommended.

How do I wire and power the HZ21WB sensor?

Connect the red wire to your DC power supply positive (4.5–18V), the black wire to ground, and the yellow wire to your microcontroller's digital or analog input pin for signal reading. The sensor draws less than 15mA. For digital pulse reading, measure the frequency on the signal line. For analog reading, the voltage on the signal line will vary with flow rate.

Package Includes

  • 1 x Saier HZ21WB Water Flow Sensor

Additional Information

Weight 0.066 kg
Dimensions 12 × 10 × 3 cm