1. Product Overview
The MAIMEIMI Fuel Level Gauge and Sensor system is designed to accurately monitor fuel or water levels in various applications, including marine vessels, boats, and automobiles. This system provides reliable readings with a clear, red-backlit 52mm (2-inch) gauge and a durable stainless steel sensor.
2. Specifications
| Component | Specification |
|---|---|
| Gauge | |
| Diameter | 52mm (2 inches) |
| Working Voltage | 9-32VDC (Max 36V for ≤1 minute) |
| Working Current | ≤60mA |
| Operating Temperature | -30°C to +75°C |
| Ohm Range | 0-190 ohm |
| Backlight Color | Red |
| Sensor | |
| Protection Rank | IP67 |
| Resolution Range | 21 mm |
| Assembly Standard | SAE standard 5 holes |
| Rated Current for Alarm Switch | 500mA |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -40°C to +85°C |
| Output Signal | 0-190 ohm |
| Sensor Lengths Available | 100mm, 125mm, 150mm, 175mm, 200mm, 225mm, 250mm, 275mm, 300mm, 325mm, 350mm, 375mm, 400mm, 425mm, 450mm, 475mm, 500mm, 525mm, 550mm |
| Fitment | Gasoline, diesel, methanol fuel, ethanol fuel |
3. Installation
3.1 Sensor Installation
- Ensure the fuel/water tank is empty or at a safe level before installation.
- Select the appropriate sensor length for your tank depth.
- Mount the sensor using the SAE standard 5-hole pattern. Use the provided 5 M5 screws and 2mm thick gasket to ensure a secure and leak-proof seal.
- Position the sensor so that the float can move freely throughout the tank's full range.
3.2 Gauge Wiring
Refer to the wiring diagram below for proper connection. Incorrect wiring can damage the gauge or sensor.
Gauge Connections:
- Terminal 1: Battery Positive (+9-32VDC)
- Terminal 2: Battery Negative (-) / Ground
- Terminal 3: Sensor Signal Input
- Terminal 5: Backlight Positive (+9-32VDC)
Sensor Connections:
- Blue Wire: Connect to Ground line (Battery Negative)
- Brown Wire: Connect to Gauge Signal Input (Terminal 3)
Important Note: Wires should not be connected directly to battery positive (+) without the gauge. Ensure all connections are secure and insulated.
If connecting to a volt meter or hour meter, generally no Terminal 4 is used. If a pull-up resistor is needed to divide voltage, its value should be half of the maximum ohm value of the level sensor.
4. Operating Instructions
Once properly installed and wired, the fuel level gauge will display the current fuel or water level in your tank. The gauge indicates levels from 'E' (Empty) to 'F' (Full).
- Empty Level (0 ohm): When the tank is empty, the gauge will point to 'E'. Note that there will be a small gap (3-15mm) between the sensor float and the bottom of the sensor, which is normal for proper operation.
- Full Level (190 ohm): When the tank is full, the gauge will point to 'F'. Similarly, a small gap (3-15mm) will exist between the float and the top of the sensor.
- The red backlight will illuminate when the backlight positive wire is connected, providing visibility in low-light conditions.
Video 1: Product overview and demonstration of the fuel level gauge and sensor.
5. Maintenance
The MAIMEIMI Fuel Level Sensor is designed with IP67 protection, making it highly resistant to dust and water ingress. Minimal maintenance is required.
- Regular Inspection: Periodically check all electrical connections for tightness and signs of corrosion. Clean any corrosion with a suitable electrical contact cleaner.
- Cleaning: The gauge face can be wiped clean with a soft, damp cloth. Avoid abrasive cleaners or solvents.
- Sensor Check: Ensure the sensor float moves freely along the shaft. If debris is present, it may need to be removed (ensure tank is empty and safe before accessing).
6. Troubleshooting
- Gauge not displaying or displaying incorrectly:
- Check all power connections to the gauge (Battery + and -). Ensure the voltage is within the 9-32VDC operating range.
- Verify the sensor signal wire is correctly connected to the gauge and the sensor's brown wire.
- Check the sensor's blue wire connection to ground.
- Inspect the sensor for any physical obstructions preventing the float from moving freely.
- Ensure the sensor's output signal (0-190 ohm) matches the gauge's input range.
- Backlight not working:
- Check the backlight positive wire connection to the gauge.
- Ensure power is supplied to the backlight circuit.
- Inaccurate readings:
- Confirm the sensor length is appropriate for the tank depth.
- Check for any debris or damage to the sensor float or shaft.
- Verify the sensor is securely mounted and not shifting.
7. User Tips
- Sensor Length: Always choose a sensor length that closely matches the depth of your tank for the most accurate readings.
- Wiring Verification: Before applying power, meticulously double-check all wiring connections against the provided diagram to prevent damage.
- Professional Installation: For complex electrical systems or if you are unsure about the installation process, consider consulting a qualified marine or automotive electrician.
- Tank Compatibility: This sensor is compatible with gasoline, diesel, methanol, and ethanol fuels. Ensure your tank material is also compatible with these fuels.
8. Warranty and Support
For any questions, technical assistance, or support regarding your MAIMEIMI Fuel Level Gauge and Sensor, please contact the MAIMEIMI Instruments Store directly. Refer to your purchase documentation for specific warranty terms and contact information.
