What is a Combustible Gas Detector?
A combustible gas detector acts as a “safety sentinel” in industrial and residential settings. Utilizing technologies such as catalytic combustion and infrared absorption, it continuously monitors the concentration of combustible gases like methane, hydrogen, and liquefied petroleum gas in the environment. When the concentration reaches a preset threshold, the device immediately triggers an audible and visual alarm and can activate linked equipment such as solenoid valves and exhaust fans to automatically cut off the gas supply and ventilate the area, nipping potential accidents in the bud.
As a specialized instrument dedicated to continuously detecting the concentration of combustible gas leaks, it is classified as safety equipment. Since July 2025, combustible gas detectors have been included in China’s Compulsory Product Certification (CCC) management system. Products without the CCC mark are prohibited from being sold or used. This “hard constraint” of regulations underscores the critical importance of such devices for safeguarding life.
How to Install a Combustible Gas Detector Correctly?
★ In areas where release sources are located outdoors or in open-air plant buildings, the horizontal distance between a combustible gas detector and any release source within its coverage area should generally not exceed 10 meters. For toxic gas detectors, this distance should not exceed 4 meters.
★ In areas where release sources are located inside enclosed plant buildings or semi-enclosed plant buildings with localized poor ventilation, the horizontal distance between a combustible gas detector and any release source within its coverage area should generally not exceed 5 meters. For toxic gas detectors, this distance should not exceed 2 meters.
★ For detecting combustible or toxic gases heavier than air, the detector should be installed at a height of 0.3 to 0.6 meters above the ground (or floor).
★ For detecting combustible or toxic gases lighter than air, the detector should be installed within 2.0 meters above the release source.
★ For detecting combustible or toxic gases slightly heavier than air, the detector should be installed 0.5 to 1.0 meters below the release source.
★ For detecting combustible or toxic gases slightly lighter than air, the detector should be installed 0.5 to 1.0 meters above the release source.
Avoid Interference Zones: Keep detectors away from areas with strong airflow, such as ventilation openings, air conditioner vents, doors, and windows, to prevent gas from being dispersed and causing missed detection. Avoid installing in locations with heavy cooking fumes, high humidity, or high temperatures (e.g., near stoves, bathrooms, or radiators).
How to Maintain a Combustible Gas Detector?
In recent years, safety incidents caused by combustible gas detectors being “installed but not used” or improperly maintained have occurred frequently. These cases serve as a stark warning: installation is only the first step; proper usage and regular maintenance are the true “lifelines” for ensuring safety!
1. Startup and Warm-up: After connecting the power, the device will warm up automatically. The monitoring status is only active once the indicator light remains steadily on.
Note: Do not touch the probe or forcibly turn off the power during the warm-up period, as this may damage the sensor.
2. Daily Monitoring and Alarm Handling
▲ Real-time Monitoring: The detector continuously monitors the concentration of combustible gases in the environment. If the value exceeds the preset threshold, it immediately triggers an audible and visual alarm. Some models will also send alerts via phone call, text message, or app notification.
▲ Alarm Handling Procedure:
Step 1: Cut off the gas supply. Quickly close the main gas valve or the valve near the leak point to stop further gas leakage.
Step 2: Ventilate the area. Open doors and windows. Use natural ventilation or exhaust fans to accelerate gas dispersion and reduce concentration.
Step 3: Avoid electrical actions. Do not turn lights on or off. Avoid using electrical appliances such as range hoods or mobile phones to prevent sparks that could ignite the gas.
Step 4: Evacuate and call for help. Immediately evacuate personnel to a safe area and dial 119 or call the gas company for assistance.
Step 5: Professional inspection. Do not attempt to repair the leak yourself. A qualified professional must identify and fix the leak point.
3. Regular Testing and Calibration
▲ Functional Testing: The control and alarm units of fixed instruments should be inspected to ensure their lights, alarms, and circuits are functioning correctly. The inspection interval should not exceed 3 months.
Handling Anomalies: If there is no response during testing, replace the batteries immediately or contact after-sales service for repair.
▲ Professional Calibration (At Least Once a Year): A professional organization should calibrate the detector using standard gases (such as methane or propane) to verify that its detection accuracy meets requirements.
▲ Sensor Maintenance:
Clean Dust: Use a soft brush or dry cloth to clean dust off the probe surface every six months to prevent clogging of the air intake which can affect sensitivity.
Replace the Sensor: When the sensor reaches the end of its lifespan (typically 3-5 years, refer to the manual for specifics), it must be replaced promptly. Do not use it beyond its service life, as this may lead to false alarms or missed detections.
4. Power Management
Ensure that the power supply lines are free from aging or short-circuit risks. Avoid frequent power outages that could lead to data loss or equipment damage.
A combustible gas detector is not a “disposable item” but a critical line of defense that requires ongoing attention and regular maintenance. Businesses must abandon the risky mindset of “installing but not using.” Guided by regulations, protected by technology, and driven by a sense of responsibility, we must build a strong fortress for gas safety. Chicheng Electric is committed to making every detector a “loyal guardian” of safety!
