1. Introduction
The ANENG GN807 is a high-precision combustible gas leak detector designed for quickly and reliably identifying gas leaks in various environments, including household and industrial settings. This device is an essential tool for professionals and homeowners alike, ensuring safety by detecting a wide range of flammable gases.
Before operating the device, please read this manual carefully and familiarize yourself with all functions and safety precautions.
Product Overview

Figure 1: ANENG GN807 Combustible Gas Detector highlighting key features.
The GN807 features a color reverse display for clear readings, adjustable sensitivity, sound and light alarms, and an extended bendable gooseneck for reaching confined spaces. It also detects ambient temperature and humidity.
Product Video
Video 1: A brief overview of the ANENG GN807 Combustible Gas Detector's features and applications.
2. Package Contents
Please check the package contents upon receipt to ensure all items are present and undamaged:

Figure 2: Included accessories with the ANENG GN807.
- 1 x ANENG GN807 Combustible Gas Detector
- 1 x Screwdriver
- 1 x Storage Bag
- 1 x Packing Box
- 1 x User Manual (this document)
Note: 3x 1.5V AAA batteries are NOT included and must be purchased separately.
3. Setup
3.1 Battery Installation
The ANENG GN807 requires three (3) 1.5V AAA batteries for operation. Follow these steps to install the batteries:

Figure 3: Battery installation guide.
- If the battery symbol appears on the screen, it indicates that the battery needs to be replaced.
- Use the provided screwdriver to unscrew the battery cover on the back of the device.
- Load three (3) 1.5V AAA batteries, ensuring correct polarity (positive and negative electrodes).
- Replace the battery cover and secure it with the screws.
3.2 Initial Inspection
Before first use, visually inspect the device for any signs of damage. Ensure the gooseneck is securely attached and the sensor head is clean.
4. Operating Instructions
4.1 Power On and Warm-Up

Figure 4: Step-by-step guide for operating the gas detector.
- Power On: In a clean air environment, press the power button (U) to turn on the device.
- Warm Up: The meter will preheat for approximately 30 seconds. During this time, the display will show "ZERO WAIT...." and you will hear three beeps, indicating that preheating is complete.
4.2 Gas Leak Detection
Once the warm-up is complete, the device is ready for detection.
- Positioning: Take the detector to the area where you suspect a leak. Bring the sensor head closer to the potential detection point (e.g., gas pipelines, stove connections).
- Flammable Gas Detected: If the detector senses combustible gas, the simulated segments on the display will increase, and the device will emit a buzzing alarm.
- No Combustible Gas Detected: If no combustible gas is detected, the analog section of the display will not rise, and there will be no beep.

Figure 5: Detecting gas leaks in pipelines and controlling the buzzer.
4.3 Sensitivity Adjustment
The GN807 offers adjustable sensitivity to suit different detection needs:

Figure 6: Adjusting sensitivity for gas leak detection.
- Press the LOW button for low sensitivity (Hyposensitivity).
- Press the HIGH button for high sensitivity.
When the gas concentration does not exceed 20% of the safe value, the screen simulation section will not rise, and there will be no buzzer alarm for safety.
4.4 Alarm Sound Switch
To turn the buzzer alarm sound on or off, press the speaker icon button (🔊).
4.5 Temperature Unit Selection
To switch between Celsius (°C) and Fahrenheit (°F) for temperature display, press the °C/°F button.
4.6 Automatic Shutdown
The device features an automatic shutdown function. If there is no operation for 10 minutes, it will automatically power off to conserve battery life.
To cancel the automatic shutdown feature, press and hold the power button while turning on the device.
5. Maintenance
5.1 Battery Replacement
When the low power prompt appears on the screen, replace the batteries as described in Section 3.1. Always use three new 1.5V AAA batteries.
5.2 Sensor Care
The gas-sensitive semiconductor sensor is crucial for accurate detection. Keep the sensor head clean and free from dust, dirt, or liquids. Do not attempt to clean the sensor with harsh chemicals or abrasive materials.
5.3 Storage
When not in use, store the detector in the provided storage bag in a cool, dry place, away from direct sunlight and extreme temperatures. Remove batteries if storing for extended periods to prevent leakage.
6. Specifications
The ANENG GN807 Combustible Gas Detector has the following technical specifications:

Figure 7: Technical specifications of the ANENG GN807.
| Parameter | Specification |
|---|---|
| Ambient temperature detection | -20.0°C to 60.0°C (-4.0°F to 140.0°F) Accuracy: 0.0°C to 45.0°C (32°F to 113°F) ± 2.0°C/4.0°F; Other: +3°C/6.0°F Resolution: 0.1/1 |
| Environmental humidity detection | Range: 0.0%~99.9% RH Accuracy: 20%~80% RH: ±5.0% RH; Others: ±6.0% RH |
| Response time | <= 500ppm: about 5 seconds; > 500ppm: about 2 seconds |
| Alarm method | Analog segment display, buzzer alarm |
| Alarm sound switch | Press the speaker icon key to turn off/on the buzzer |
| Automatic shutdown | If no operation for 10 minutes, it will automatically shut down. |
| Cancel automatic shutdown | In power-on state, press the power button to cancel. |
| Sensor | Gas sensitive semiconductor |
| Detection range | 50~10000PPM (Methane) |
| Response sensitivity | > 50ppm (Methane) |
| Adjustable sensitivity | High sensitivity/low sensitivity |
| Temperature unit selection | °C/°F |
| Warm-up time | About 30 seconds |
| Battery | 1.5V AAA battery * 3 (Not included) |
| Color reverse screen | Yes |
| Low power prompt | Yes |
The parameters are for reference only, and the actual measurement of the specific equipment shall prevail.
6.1 Detectable Gases
The ANENG GN807 is capable of detecting a wide range of flammable gases, including but not limited to:

Figure 8: Examples of flammable gases detectable by the GN807.
- Acetone (C3H6O)
- Acetylene (C2H2)
- Alcohol (C2H6O)
- Ammonia (NH3)
- Benzene (C6H6)
- Butane (C4H10)
- Ethanol (C2H6O)
- Ethylene Oxide (C2H4O)
- Gasoline
- Ethane (C2H6)
- Hydrogen (H2)
- Methane/Natural Gas (CH4)
- Naphtha (C9)
- Paint Thinner
- Propane (C3H8)
6.2 Product Dimensions

Figure 9: Physical dimensions of the ANENG GN807.
- Detector Body Length: 13.2 cm (5.2 inches)
- Detector Body Width: 6.1 cm (2.4 inches)
- Detector Body Thickness: 3.05 cm (1.2 inches)
- Gooseneck Length: 27 cm (10.6 inches)
- Total Length (Detector + Gooseneck): 40.2 cm (15.8 inches)
7. Troubleshooting
- Device does not power on:
- Check if batteries are installed correctly with proper polarity.
- Ensure batteries are new and fully charged. Replace if necessary.
- Verify the battery cover is securely closed.
- No gas detected but a leak is suspected:
- Ensure the device has completed its warm-up cycle.
- Increase the sensitivity setting to "HIGH".
- Move the sensor head closer to the suspected leak source.
- Check if the sensor head is clean and unobstructed.
- Buzzer alarm is not sounding:
- Press the speaker icon button to ensure the buzzer is turned on.
- Check battery level; low batteries might affect alarm function.
- Device shuts off unexpectedly:
- The automatic shutdown feature might be active. If you need continuous operation, remember to cancel it during power-on (see Section 4.6).
- Check battery level; replace if low.
8. User Tips
- Always warm up in fresh air: To ensure accurate readings, always power on the device and allow it to complete its warm-up cycle in an environment free of gas.
- Use the gooseneck effectively: The flexible gooseneck allows you to reach tight spaces. Bend it carefully to access hard-to-reach areas where leaks might occur, such as behind appliances or within pipe networks.
- Adjust sensitivity as needed: For general checks, start with low sensitivity. If you suspect a very small leak or are in a well-ventilated area, switch to high sensitivity for better detection.
- Regular battery checks: Keep spare AAA batteries on hand, especially for professional use, to avoid interruptions during critical inspections.
- Understand the display: Pay attention to both the analog segment display and the buzzer alarm. The segments provide a visual indication of gas concentration, while the buzzer provides an audible alert.
9. Warranty and Support
For warranty information and technical support, please refer to the official ANENG website or contact your retailer. Keep your purchase receipt as proof of purchase.
For additional information, you may also consult the User Manual (PDF) available online.