User Manual for Carbest 2-in-1 Gas Detector
Comprehensive user guide for the Carbest 2-in-1 Gas Detector. Includes installation instructions, operating procedures, LED status indicators, testing methods, and warranty information.
Quick answers from the manual
Quick answer
- The Carbest 2-in-1 Gas Detector is a wall-mounted device for detecting LPG and CO. It requires 12V DC power and has a 3-minute warm-up period. p. 3, 7
Key actions
- Install the detector at the correct height based on gas density. p. 4, 8
First start
- Connect to 12V DC power. The green LED will flash for 3 minutes during warm-up, then stay lit. p. 4, 8
Problems and fixes
Cut off power and contact the After Service Center.
p. 4, 8Maintenance and reset
- If the detector runs disorderly, cut the power off and rerun again. p. 4, 8
Technical specifications
| Parameter | Value | Meaning | Pages |
|---|---|---|---|
| Voltage | 12V DC | Operating voltage | p. 3, 7 |
Where to find it in the PDF
- Product Profile p. 3, 7
- Installation p. 4, 8
- LED Information p. 5, 9
Table of contents
Manual images
Click an image to enlargeQuick guide from the manual
The Carbest 2-in-1 Gas Detector is a wall-mounted device designed to detect leaking Propane/Butane (LPG) and Carbon Monoxide (CO). It operates on a 12V DC power supply and features a 3-minute warm-up period upon startup. The device provides both optical and acoustic alarms.
Product Overview
The detector consists of the following main components:

- Power Cable: For 12V DC connection.
- Air Intake: Area for gas detection.
- Test Button: Used for manual testing.
- LED Indicator: Displays operational status.
- Buzzer: Emits acoustic alarm signals.
Installation
Proper installation is critical for effective detection. The mounting height depends on the density of the gas you are monitoring:

- Gas heavier than air (e.g., LPG/Propane/Butane): Install 0.3 to 1.0 meters from the floor, within 1.5 meters of the gas source.
- Gas lighter than air (e.g., CO): Install 0.3 to 1.0 meters from the ceiling.
Operation
The detector operates independently once installed:
- Warm-up: Upon connecting to 12V DC power, the green LED flashes for approximately 3 minutes.
- Normal State: Once the green LED remains lit, the detector is in normal working mode.
- Alarm: If gas is detected, the red LED flashes, and the buzzer sounds a voice alarm.
- Voice Alarm: The device provides specific voice alerts for gas leaks and carbon monoxide detection.
Testing
To test the detector, you can use an unlit lighter to release a small amount of gas near the air intake (approx. 5 cm distance). Alternatively, press the test button to verify the CO alarm function. The device will return to normal operation once the gas concentration drops below the alarm threshold.
LED Status Indicators
- Preheating State: Green light flashes.
- Standby Mode: Green light on.
- CO & Gas Alarm: Red light flashes.
- CO & Gas Fault: Red light on.
Troubleshooting
If the buzzer emits a long beep and the red LED is on, this indicates an internal sensor failure. Disconnect the power supply and contact the After Service Center. If the detector behaves erratically, power it off and restart it.
Maintenance
Perform periodic maintenance according to the instructions and ensure the detector is tested at least every six months.
Manufacturer information
Carbest
Practical help
Common problems
Cut off power and contact the After Service Center.
Cut off power and restart the device.
Before use
- Ensure 12V DC power supply is available.
- Choose installation location based on gas type (heavier or lighter than air).
- Allow 3 minutes for warm-up after power-on.
- Test the device every six months.
Specs in practice
- Standby consumption
- 90 mA
- Alarm consumption
- 100 mA
- Acoustic signal
- 85 dB
Images and diagrams
- The detector features a test button, air intake, and LED indicators.
- Installation height depends on whether the gas is heavier or lighter than air.
Model compatibility
- Detects Propane/Butane (LPG) and Carbon Monoxide (CO).
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.