SKU: SENS-0606
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Saier HZ21WB Water Flow Sensor (1–30 L/min) - DC 4.5-18V

₹279.00 (Inclusive of all taxes)
Out of Stock

The Saier HZ21WB is a turbine-based water flow sensor module designed for precise liquid flow rate monitoring from 1 to 30 L/min. Operating on a wide DC 4.5-18V supply, it provides both analog and digital output signals for easy integration with microcontrollers like Arduino, Raspberry Pi, ESP32, and industrial PLCs.

Features

  • Turbine-based sensing for accurate flow measurement from 1 to 30 liters per minute.
  • Wide operating voltage range of DC 4.5-18V with low current consumption (≤15mA).
  • Dual analog and digital output options for flexible system integration.
  • Durable construction suitable for water and compatible gas flow applications.
  • Compact form factor for easy installation in confined spaces.

Out of stock

Description

The Saier HZ21WB Water Flow Sensor employs a precision turbine mechanism to translate fluid velocity into a measurable electrical signal. As liquid passes through the sensor body, it spins an internal rotor; the rotational speed is directly proportional to the flow rate, which is then converted into either a pulse frequency (digital output) or a corresponding analog voltage.

Engineered for reliability, the sensor features a robust housing capable of withstanding working pressures up to 1.75 MPa. Its wide input voltage compatibility makes it suitable for both 5V and 3.3V logic systems with appropriate conditioning, while the low-level output signal ensures compatibility with standard microcontroller GPIO pins. The design prioritizes long-term stability with an insulation resistance greater than 100 MΩ.

Key Features

  • Precision turbine flow sensor with a measurement range of 1–30 L/min.
  • Broad DC power input range from 4.5V to 18V for versatile power supply compatibility.
  • Low quiescent current draw of ≤15mA for energy-efficient operation.
  • Provides both digital pulse and analog voltage output signals for design flexibility.
  • Rugged construction designed for long-term use with water and compatible gases.
  • High insulation resistance (>100 MΩ) and dielectric strength (AC500V) for electrical safety.
  • Compact and lightweight design for straightforward integration into piping systems.
  • Optimized performance-to-cost ratio for commercial and industrial monitoring applications.

Applications

  • Flow rate monitoring in residential and commercial water heaters and boilers.
  • Liquid dispensing control in coffee machines, vending machines, and beverage systems.
  • Process water monitoring in industrial cooling loops and filtration systems.
  • Irrigation flow measurement and control in agricultural and hydroponic setups.
  • Diagnostic and fluid monitoring in medical testing and analytical equipment.

Technical Specifications

Model NumberHZ21WB
Flow Rate Range1 to 30 L/min
Max Working Pressure≤1.75 MPa
Operating VoltageDC 4.5 to 18V
Input Current≤15 mA
Insulation Resistance>100 MΩ
Dielectric StrengthAC500V, 50Hz
High-Level Output Voltage≥4.5V (VDD)
Low-Level Output Voltage≤0.5V
Typical Accuracy5-8%
Output InterfaceAnalog & Digital (Pulse)

Frequently Asked Questions

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

The HZ21WB provides dual output options. It generates a digital pulse signal where the frequency corresponds to the flow rate, suitable for direct microcontroller input. It also provides an analog voltage output that varies proportionally with the flow, which can be read by an ADC pin. The high-level output is ≥4.5V, compatible with 5V logic systems.

What is the required operating voltage and current for this sensor?

The sensor operates on a wide DC voltage range from 4.5V to 18V, making it compatible with common 5V, 12V, or regulated power supplies. The input current is very low, at ≤15mA, ensuring minimal power drain on your system. Ensure your power source can provide a stable voltage within this range for accurate sensor performance.

Can this sensor be used with gases, or is it only for liquids?

While primarily designed and calibrated for water and similar liquids, the manufacturer specifies compatibility with certain gases. However, for gas applications, ensure the gas is clean, dry, and non-corrosive to avoid damaging the internal turbine mechanism. Calibration and accuracy may differ from liquid use, so testing under your specific conditions is recommended.

How do I interface this flow sensor with an Arduino or Raspberry Pi?

For digital interfacing, connect the sensor's signal wire to a digital interrupt pin on your Arduino or Raspberry Pi GPIO to count pulses per unit time. For analog reading, connect the output to an analog input pin (ADC). You will need to provide a stable 5V (or within 4.5-18V) power supply to the sensor's VCC and GND pins. A simple library can be used to convert pulse frequency to flow rate (L/min).

What is the accuracy and maximum pressure rating of this flow meter?

The sensor has a typical accuracy of 5-8% across its 1-30 L/min range. It is rated for a maximum working water pressure of ≤1.75 MPa (approximately 254 psi). This pressure rating makes it suitable for most residential plumbing, light industrial, and appliance applications, but it should not be used in high-pressure hydraulic systems exceeding this limit.

Package Includes

  • 1 x Saier HZ21WB Water Flow Sensor

Additional Information

Weight 0.08 kg
Dimensions 12 × 10 × 4 cm