DIGITEN G2 2 inch Water Flow Hall Sensor User Manual

1. Introduction

This manual provides detailed instructions for the installation, operation, and maintenance of the DIGITEN G2 2-inch Water Flow Hall Sensor. This device is designed to accurately measure water flow rates within a range of 10 to 200 liters per minute, utilizing a Hall effect sensor to generate a pulse signal proportional to the flow. It is suitable for various industrial and scientific applications requiring precise flow monitoring.

2. Safety Information

Please read and understand all safety instructions before installing or operating the flow sensor. Failure to do so may result in damage to the device, property, or personal injury.

• Electrical Safety: Ensure the working voltage range of DC 5-18V is strictly adhered to. Incorrect voltage can damage the sensor.
• Pressure Limits: Do not exceed the maximum allowable water pressure of 1.75 MPa (approximately 17.5 bar or 253 PSI). Exceeding this pressure can cause leaks or sensor failure.
• Temperature Limits: Operate the sensor within the specified operating temperature range of up to 80°C (176°F). Avoid exposure to temperatures outside this range.
• Installation: Ensure proper sealing and secure connections to prevent water leakage.
• Handling: Handle the sensor with care to avoid physical damage.

3. Product Overview

The DIGITEN G2 Water Flow Hall Sensor is a robust and reliable device designed for continuous water flow measurement. It features a durable plastic construction and a Hall effect sensor for accurate pulse output.

Key Features:

• Flow range: 10-200 L/min
• Working voltage range: DC 5-18 V
• Output Waveform: Square Wave, pulse signal
• Sensor: Hall effect
• Waterproof, heat resistance, pressure resistance, cold resistance

Figure 3.1: Front view of the DIGITEN G2 Water Flow Hall Sensor, showing the sensor module and wiring.

Figure 3.2: Internal view of the flow sensor, showing the impeller responsible for flow measurement.

4. Setup and Installation

The DIGITEN G2 flow sensor is designed for easy installation. Follow these steps for proper setup:

1. Prepare the Installation Site: Ensure the water pipe is clean and free of debris. The sensor is designed for 2-inch connections.
2. Orient the Sensor: Observe the flow direction arrow marked on the side of the sensor body. Install the sensor so that the arrow aligns with the direction of water flow in your system.


Figure 4.1: Side view of the sensor indicating the water flow direction with an arrow.

3. Connect to Piping: Securely connect the 2-inch inlet and outlet of the sensor to your water piping system. Ensure all connections are watertight to prevent leaks. The sensor is designed for compression type connections.
4. Wiring Connections: Connect the sensor's wires to your control system according to the following color code:
• Red Wire: VCC (+) - Power Supply (DC 5-18V)
• Black Wire: GND - Ground
• Yellow Wire: Signal - Pulse Output


Figure 4.2: Angled view of the sensor, highlighting the electrical connections.

5. Power On: Once all connections are secure, apply power within the specified voltage range (DC 5-18V).

5. Operation

The DIGITEN G2 flow sensor operates by generating a series of electrical pulses, with the frequency of these pulses being directly proportional to the rate of water flow. This pulse signal can be read by a microcontroller (e.g., Arduino) or other compatible electronic devices to calculate the flow rate.

Understanding the Output Signal:

The sensor outputs a square wave pulse signal. The number of pulses per liter (K-value) is crucial for accurate flow calculation. While the exact K-value can vary slightly based on installation and specific conditions, it is typically determined through calibration. For this model, users have reported a K-value of approximately 0.2 pulses per liter, meaning 12 pulses per liter (as per user feedback, 12 pulses/L for 2 inch). It is recommended to perform your own calibration for critical applications.

Figure 5.1: Diagram illustrating the square wave output signal and physical dimensions of the sensor.

6. Maintenance

The DIGITEN G2 Water Flow Hall Sensor is designed for low maintenance. However, adhering to the following guidelines can prolong its lifespan and ensure continued accuracy:

• Regular Inspection: Periodically check for any signs of leakage around the connections or physical damage to the sensor body.
• Cleanliness: While the sensor is designed for water, ensure the water flowing through it is relatively clean and free of large particles that could obstruct the impeller or cause wear.
• Environmental Conditions: Ensure the operating environment remains within the specified temperature and humidity ranges.
• Avoid Freezing: In cold environments, ensure the sensor and connected pipes do not freeze, as this can cause irreversible damage.

7. Troubleshooting

If you encounter issues with your DIGITEN G2 Water Flow Hall Sensor, consider the following troubleshooting steps:

• No Signal Output:
  • Verify that the sensor is correctly wired (Red to VCC, Black to GND, Yellow to Signal).
  • Check the power supply voltage to ensure it is within the DC 5-18V range.
  • Ensure there is actual water flow through the sensor.
• Inaccurate Readings:
  • Confirm the sensor is installed with the correct flow direction.
  • Recalibrate your system to determine the precise K-value for your specific setup. Variations in pipe diameter, water viscosity, and installation can affect accuracy.
  • Check for any obstructions within the sensor or piping that might impede the impeller's rotation.
• Leakage:
  • Ensure all threaded connections are properly tightened and sealed. Consider using appropriate thread sealant if necessary.
  • Verify that the water pressure does not exceed 1.75 MPa.

8. Specifications

9. Warranty and Support

DIGITEN provides a one-year warranty for any quality-related issues with this product. If you encounter any problems or require technical assistance, please contact DIGITEN customer support through the official channels where you purchased the product or visit the DIGITEN Store on Amazon for more information.