1. Introduction
Thank you for choosing the MAIMEIMI 2-in-1 Auto Gauge Set. This digital gauge combines a water temperature gauge (Fahrenheit) and a voltmeter into a single, compact unit, designed for use in 12V and 24V automotive vehicles. This manual provides essential information for the proper installation, operation, and maintenance of your new gauge, ensuring optimal performance and longevity.
Please read this manual thoroughly before installation and use. Keep it for future reference.
2. Product Overview
The MAIMEIMI 2-in-1 Auto Gauge Set provides real-time monitoring of your vehicle's engine water temperature and battery voltage. Its LED digital display offers clear and precise readings, enhancing your driving experience by keeping critical vehicle data readily accessible.
Figure 2.1: Front view of the MAIMEIMI 2-in-1 Auto Gauge Set, displaying water temperature in Fahrenheit and voltage.
Figure 2.2: Key components of the gauge set, including the main display unit, water temperature sensor, and set button.
Figure 2.3: Product dimensions and sensor specifications for installation planning.
3. Features
- Dual Functionality: Combines water temperature (Fahrenheit ℉) and voltage display in one unit.
- Wide Temperature Range: Water temperature indicating range from 14℉ to 248℉ Fahrenheit.
- Temperature Warning: Alarm range for water temperature is 203℉ to 248℉.
- Broad Voltage Compatibility: Operates on DC 9V-36V power supply.
- Voltage Alarm: Default alarm values for voltage are >30V and <10V. Alarms are indicated by a flashing display.
- High Quality Construction: Made from durable ABS material with an LED digital display for stable performance, anti-vibration, and anti-bump properties.
- Easy Installation: Designed for straightforward installation in most 12-24V vehicles.
- Reverse Connection Protection: Built-in protection ensures the gauge functions correctly even if wiring is accidentally reversed.
4. Package Contents
Upon opening the package, please verify that all the following items are included:
- 1 x 2-in-1 Water Temperature and Volt Gauge
- 1 x 1/8" NPT Temperature Sensor
- 1 x Wiring Harness
- 1 x Double-sided Adhesive Non-slip Pad
- Mounting Hardware (screws, nuts, etc.)
- 1 x Instruction Manual (this document)
Figure 4.1: All components included in the product package.
5. Specifications
| Attribute | Value |
|---|---|
| Product Dimensions (L x W x H) | 4.13 x 3.15 x 1.77 inches (105 x 80 x 45 mm) |
| Item Weight | 0.4 Pounds (6.4 ounces) |
| Material | ABS, Metal, Stainless Steel |
| Power Supply Voltage Range | DC 9V-36V |
| Water Temperature Indicating Range | 14℉ - 248℉ Fahrenheit |
| Water Temperature Warning Range | 203℉ - 248℉ Fahrenheit |
| Voltage Alarm Values | >30V, <10V |
| Temperature Sensor Thread | 1/8" NPT (10mm) |
6. Setup and Installation
This gauge is designed for easy installation in most 12V-24V automotive vehicles. Professional installation is recommended if you are unfamiliar with vehicle electrical systems.
6.1 Mounting the Gauge
- Choose a suitable, flat, and stable location on your dashboard or desired mounting surface that does not obstruct your view or interfere with driving controls.
- Clean the mounting surface thoroughly to ensure proper adhesion.
- Apply the provided double-sided adhesive non-slip pad to the bottom of the gauge unit.
- Press the gauge firmly onto the chosen surface to secure it.
Figure 6.1: Example of the gauge installed in a car.
Figure 6.2: Example of the gauge installed in a boat.
6.2 Wiring Connections
The gauge comes with a wiring harness for electrical connections. Ensure the vehicle's ignition is off before proceeding with wiring.
- Power Connection:
- Connect the black wire of the wiring harness to the vehicle's negative (-) terminal (ground).
- Connect the red wire of the wiring harness to the vehicle's positive (+) terminal (12V or 24V power source, typically an ignition-switched power supply).
- Temperature Sensor Connection:
- Locate a suitable 1/8" NPT port on your engine's cooling system for the temperature sensor. This is typically near the thermostat housing or a coolant hose. If no suitable port exists, an adapter may be required (not included).
- Carefully thread the 1/8" NPT temperature sensor into the chosen port. Ensure a tight seal to prevent coolant leaks.
- Connect the two wires from the temperature sensor to the corresponding terminals on the gauge's wiring harness. The sensor wires are typically non-polarized, meaning the connection order does not matter.
Important Note:
The water temperature and volt gauge feature anti-reverse connection protection. This means that even if the positive and negative power wires are accidentally connected incorrectly, the digital gauge will still function properly without damage. However, always strive for correct wiring to ensure optimal performance and safety.
7. Operating Instructions
Once properly installed and wired, the MAIMEIMI 2-in-1 Auto Gauge Set will automatically power on when the vehicle's ignition is turned on (if connected to an ignition-switched power source).
7.1 Reading the Display
- The left side of the digital display shows the water temperature in Fahrenheit (℉).
- The right side of the digital display shows the battery voltage (V).
- The display is designed for clear visibility in various lighting conditions.
7.2 Alarm Functions
The gauge is equipped with alarm functions to alert you to critical conditions:
- Water Temperature Alarm: If the water temperature exceeds 203℉ or reaches 248℉, the temperature reading on the display will flash to indicate an overheating condition.
- Voltage Alarm: If the voltage drops below 10V or rises above 30V, the voltage reading on the display will flash, indicating a potential issue with the vehicle's electrical system (e.g., low battery, overcharging).
When an alarm condition is met, the corresponding value on the display will flash continuously until the condition returns to normal operating parameters.
8. Maintenance
The MAIMEIMI 2-in-1 Auto Gauge Set requires minimal maintenance to ensure its longevity and accurate performance.
- Cleaning: Regularly wipe the display and housing with a soft, dry, or slightly damp cloth. Avoid using harsh chemicals, abrasive cleaners, or solvents, as these can damage the display or finish.
- Connections: Periodically check all wiring connections to ensure they remain secure and free from corrosion. Loose connections can lead to inaccurate readings or intermittent operation.
- Sensor: Ensure the temperature sensor remains securely installed and free from debris or damage.
- Environmental Protection: While the gauge is designed to be robust, avoid exposing it to extreme temperatures, direct prolonged sunlight, or excessive moisture beyond normal vehicle operating conditions.
9. Troubleshooting
If you encounter issues with your MAIMEIMI 2-in-1 Auto Gauge Set, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Gauge does not power on | No power supply; Loose wiring connection; Blown fuse in vehicle circuit. | Check power connections (red and black wires) for proper polarity and secure fit. Verify the vehicle's power source is active. Check relevant fuses. |
| Incorrect water temperature reading | Loose or faulty temperature sensor connection; Sensor not properly installed in coolant system; Air pocket around sensor. | Ensure the temperature sensor wires are securely connected to the gauge. Verify the sensor is correctly threaded into the engine's coolant port and making good contact with coolant. Bleed air from the cooling system if necessary. |
| Water temperature alarm constantly flashing | Engine overheating; Faulty sensor or wiring. | Check engine coolant level and cooling system for issues. If engine temperature is normal, inspect sensor and wiring for damage or loose connections. |
| Incorrect voltage reading | Loose power connections; Vehicle's electrical system issue (e.g., alternator, battery). | Check the red and black power wires for secure connections. Test vehicle battery and charging system with a multimeter to confirm actual voltage. |
| Voltage alarm constantly flashing | Vehicle battery low or overcharging; Faulty wiring. | Check vehicle battery charge and alternator output. Ensure power connections to the gauge are stable and within the 9V-36V range. |
| Display is dim or flickering | Insufficient power supply; Loose connection. | Verify stable 12V/24V power supply. Check all wiring connections for tightness. |
If the problem persists after attempting these solutions, please contact MAIMEIMI customer support or consult a qualified automotive technician.
10. Warranty and Support
10.1 Warranty Information
MAIMEIMI products are manufactured to high-quality standards. For specific warranty terms and conditions applicable to your 2-in-1 Auto Gauge Set, please refer to the warranty card included with your purchase or visit the official MAIMEIMI brand store on Amazon. Warranty coverage typically includes defects in materials and workmanship under normal use.
10.2 Customer Support
Should you require assistance with installation, troubleshooting, or have any questions regarding your MAIMEIMI 2-in-1 Auto Gauge Set, please contact MAIMEIMI customer support through the Amazon platform or visit the MAIMEIMI brand store for contact information. Please have your product model number (B0C8NL3Y9C) and purchase details ready when contacting support.
