1. Introduction
Thank you for choosing the HABOTEST Combustible Gas Leak Detector. This device is designed for the safe and efficient detection of various combustible gases, providing both visual and audible alarms. Please read this manual carefully before use to ensure proper operation and to prevent personal injury or equipment damage. Keep this manual for future reference.

2. Safety Information
- Always read and understand this manual completely before operating the instrument.
- Use the measuring instrument only for its intended purpose and within the specified technical parameters.
- Do not use faulty instruments. If damage, malfunction, or incorrect displays occur, have the instrument checked by qualified personnel.
- Do not carry out measurements with the product on or near live electrical parts.
- Do not use the detector in closed rooms with explosive gas mixtures. Ensure adequate ventilation.
- Never store the product together with solvents, acids, or other corrosive substances.
- Ensure batteries are installed correctly and replaced promptly when the low voltage indicator appears.
3. Product Overview
The HABOTEST gas leak detector is a pen-type device designed for portability and ease of use. It features a high-sensitivity semiconductor gas sensor for accurate detection.
3.1 Components and Display
The detector includes a gas sensor head, power button, sensitivity key, and a display for readings and indicators.

- Gas Sensor Head: Located at the tip, responsible for detecting gas.
- Power Button: Turns the device ON/OFF.
- Sensitivity Key (S button): Adjusts between high ('Hi') and low ('Lo') sensitivity modes (for HT60/HT61 models). For HT59, this is a single sensitivity setting.
- Display: HT59 uses an LED display for concentration indication. HT60 and HT61 feature an LCD screen for clear visual data, including concentration levels and sensitivity modes.
- Concentration Indicator Light: Visual representation of gas concentration (for HT59).
- Battery Cover: Located at the bottom, for battery installation.

3.2 Detected Gases
The detector is capable of detecting a variety of combustible gases, including but not limited to:

- Methane (CH₄)
- Carbon monoxide (CO)
- Gasoline
- Dichloromethane (CH₂C₁₂)
- Benzene (C₆H₆)
- Ethylene oxide (C₂H₄O)
- Hexane (C₆H₁₄)
- Butane (C₄H₁₀)
- Ethylene (C₂H₄)
- Ethane gas (C₂H₆)
- Ethanol (C₂H₅OH)
- Acetylene (C₂H₂)
4. Setup
4.1 Battery Installation
The device requires 2 x 1.5V AAA alkaline batteries (not included). To install or replace batteries:
- Unscrew the battery cover at the bottom of the detector.
- Insert two AAA batteries, ensuring correct polarity (+/-).
- Replace the battery cover and screw it tightly.

Low Voltage Prompt: When the battery voltage is lower than the operating voltage, the display screen will show a low battery icon. Replace the batteries promptly to ensure accurate readings.

5. Operating Instructions
5.1 Power On/Off
- Press the Power button to turn on the device.
- The instrument will undergo a warm-up period of approximately 30 seconds. During this time, the display may show a countdown or a warming-up indicator.
- Once warm-up is complete, the device is ready for use.
- To turn off, press and hold the Power button.
5.2 Gas Detection
Hold the detector with the sensor head near the area where a gas leak is suspected. The device will detect combustible gases and provide an alarm.

5.3 Alarm Indication
When combustible gas is detected, the device will provide a double alarm prompt:
- Audible Alarm: A built-in buzzer will emit a sound.
- Visual Alarm: The display screen will show a red backlight, and the concentration simulation bar will increase with higher gas concentration. If no leaks are detected, the screen will display a green backlight.


5.4 Sensitivity Adjustment (HT60/HT61)
For models HT60 and HT61, you can adjust the sensitivity:
- Press the 'Hi' key to enter high sensitivity mode.
- Press the 'Lo' key to enter low sensitivity mode.

5.5 Automatic Shutdown
To conserve battery life, the detector will automatically shut down after approximately 5 minutes if there is no key operation or measurement signal.

6. Maintenance
- Cleaning: Wipe the device with a dry, soft cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the detector in a cool, dry place away from direct sunlight and corrosive substances. If storing for extended periods, remove the batteries to prevent leakage.
- Battery Replacement: Replace batteries immediately when the low voltage indicator appears to ensure optimal performance.
- Sensor Care: The gas sensor is a sensitive component. Avoid exposing it to harsh chemicals or physical impact.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not turn on | Dead or incorrectly installed batteries | Replace batteries with new 1.5V AAA alkaline batteries, ensuring correct polarity. |
| No alarm when gas is present | Sensor not warmed up; low sensitivity setting; sensor malfunction | Allow 30 seconds for warm-up. For HT60/HT61, switch to high sensitivity mode. If problem persists, contact support. |
| False alarms | Interference from other substances; high sensitivity in a non-critical area | Ensure the area is clear of other volatile compounds. For HT60/HT61, switch to low sensitivity mode if appropriate. |
| Display not working (HT60/HT61) | Low battery; device malfunction | Replace batteries. If issue persists, contact support. |
8. Specifications
8.1 General Specifications (All Models)
- Brand: HABOTEST
- Shell Material: ABS
- Color: Black & Red
- Sensor: Gas-sensitive semiconductor
- Detection Range: 50~1000ppm (methane)
- Response Sensitivity: <50ppm (methane)
- Warm-Up Time: Approx. 30 sec
- Reaction Time: ≤500PPM: Approx. 5sec; >500PPM: Approx. 2sec
- Alarm Mode: Visible and audible
- Operating Conditions: 0~50°C / 20~80% RH
- Storage Conditions: -10~60°C / 20~80% RH
- Power Supply: 2 x 1.5V AAA alkaline battery (not included)
- Safety Rating: EN61326-1
8.2 Model-Specific Specifications
| Specification | HT59 | HT60 | HT61 |
|---|---|---|---|
| Display | LED | LCD | LCD |
| Accuracy | ±30% | ±30% | ≤10% FS(methane) |
| Auto Power Off | ✓ | ✓ | ✓ |
| Low Battery Indication | ✓ | ✓ | ✓ |
| Buzzer Alert | ✓ | ✓ | ✓ |
| Product Weight | Approx. 34g | Approx. 35g | Approx. 46g |
| Product Size (L x W x H) | 158 x 24 x 28mm | 170 x 23 x 28mm | 180 x 32 x 31mm |



9. User Tips
- Preheating is Crucial: Always allow the detector to complete its 30-second warm-up period before beginning any gas detection. This ensures the sensor is stable and accurate.
- Systematic Scanning: When checking for leaks, move the sensor head slowly and systematically along pipes, connections, and appliances. Gas tends to rise, so start from lower points and move upwards.
- Sensitivity Modes: For HT60/HT61 models, use high sensitivity ('Hi') for initial broad scanning or detecting very small leaks. Switch to low sensitivity ('Lo') to pinpoint the exact source of a larger leak or in environments with minor background gases.
- Portability: The pen-type design makes it easy to carry in a pocket. Utilize this for quick checks in various locations.


Video 1: HABOTEST Gas Leak Detector Product Demonstration
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the HABOTEST customer service department. Keep your purchase receipt as proof of purchase.
Manufacturer: Dongguan Habotest Instrument Technology Co., Ltd.






