DIGITEN G3/8 Water Flow Sensor (Model FL-308T) Instruction Manual

1.製品オーバーview

The DIGITEN G3/8 Water Flow Sensor (Model FL-308T) is a Hall effect flowmeter designed for precise liquid fluid measurement. It is suitable for various applications requiring flow monitoring, such as water heaters, water dispensers, water purifiers, and irrigation systems. This sensor provides a pulse signal output proportional to the water flow rate.

Figure 1: DIGITEN G3/8 Water Flow Sensor (Model FL-308T)

主な特徴:

• 軽量でコンパクトなデザイン。
• Stable performance with low water pressure start.
• Integrated Hall effect sensor for electrical pulse output.
• Constructed from food-grade plastic for safety and reliability.
• Waterproof, heat-resistant, pressure-resistant, and cold-resistant properties.

2. 仕様

The following table details the technical specifications for the DIGITEN G3/8 Water Flow Sensor:

Figure 2: Sensor dimensions and key specifications

3. セットアップとインストール

Proper installation is crucial for accurate readings and reliable operation of the water flow sensor.

3.1配線手順

The sensor features a 3-wire connection. Connect the wires as follows:

• 赤いワイヤー: VCC (+) - Connect to the positive power supply (3-24V DC).
• 黒ワイヤー: GND (-) - Connect to ground.
• 黄色のワイヤー： Signal Output - Connect to your microcontroller or reading device.

Figure 3: Sensor with wiring label

Figure 4: Sensor with electrical connector

3.2 配管接続

The sensor uses G3/8 inch BSP (British Standard Pipe) threads. If connecting to NPT (National Pipe Taper) threads, it is recommended to use thread seal tape to ensure a watertight connection.

Ensure the sensor is installed with the correct flow direction. An arrow indicating the flow direction is marked on the sensor body. Align this arrow with the direction of water flow in your system.

Figure 5: Flow direction indicator on the sensor body

3.3 配置に関する考慮事項

• Install the sensor in a section of pipe where the water flow is stable and free from turbulence.
• Avoid installing near pumps or valves that may cause sudden changes in flow or pressure.
• Ensure easy access for future maintenance or inspection.

4. 運営原則

The DIGITEN G3/8 Water Flow Sensor operates on the Hall effect principle. Inside the sensor, a small turbine wheel rotates as water flows through it. A magnet is attached to this turbine, and a Hall effect sensor detects the magnetic field changes as the magnet passes by. Each rotation of the turbine generates an electrical pulse.

The frequency of these pulses is directly proportional to the water flow rate. The relationship is given by the formula: F = 23 * Q、 どこ：

• F is the pulse frequency in Hz.
• Q is the flow rate in Liters per Minute (L/Min).

By measuring the pulse frequency, you can calculate the instantaneous water flow rate. The sensor outputs a square wave pulse signal, which can be easily read by microcontrollers or other digital input devices.

5. メンテナンス

The DIGITEN G3/8 Water Flow Sensor is designed for low maintenance. However, periodic checks can help ensure its longevity and accuracy.

• 定期点検: Periodically check for any leaks at the connection points.
• 接続の整合性: Ensure electrical connections remain secure and free from corrosion.
• 残骸チェック: If flow readings become erratic or stop, inspect the sensor for any debris that might be obstructing the turbine's rotation. If necessary, disconnect the sensor and gently flush it with clean water. Avoid using harsh chemicals or abrasive tools.
• ストレージ： If storing the sensor for an extended period, ensure it is clean, dry, and stored within the specified storage temperature and humidity ranges.

6。 トラブルシューティング

If you encounter issues with your DIGITEN G3/8 Water Flow Sensor, consider the following troubleshooting steps:

6.1 No Signal Output

• 電源を確認してください: センサーが正しい動作電圧を受信して​​いることを確認するtage (3-24V DC) and that the ground connection is secure.
• 配線の検査: Ensure all three wires (Red, Black, Yellow) are correctly connected to your system.
• フローの検証: Confirm that water is actually flowing through the sensor. The sensor requires a minimum flow rate of 0.3 L/min to generate pulses.
• Internal Obstruction: If water is flowing but no pulses are detected, the internal turbine might be jammed by debris. Refer to the Maintenance section for cleaning instructions.

6.2 不正確な読み取り

• 流れ方向： Ensure the sensor is installed with the correct flow direction, aligning with the arrow on the sensor body.
• Stable Flow: Turbulent flow can affect accuracy. Try to install the sensor in a straight section of pipe away from elbows, valves, or pumps.
• パルス定数: Double-check your calculation using the pulse constant F = 23 * Q. Ensure your reading device is correctly interpreting the pulse frequency.
• 巻tage 安定性: Ensure the power supply to the sensor is stable and within the specified voltage範囲。

7. 保証とサポート

DIGITEN provides a one-year warranty for any product quality problems. If you experience any issues or require technical assistance, please contact DIGITEN customer support through the retailer where you purchased the product or visit the official DIGITEN webサポート リソースのサイト。

For further information or inquiries, please refer to the contact details provided with your purchase or on the DIGITEN brand store page.