Methane gas alarm produced by CMC:
Industries that widely use fixed methane combustible gas alarm systems include:
Oil and gas industry: oil and gas extraction sites, natural gas transmission and storage stations, liquefied natural gas plants, and filling stations
Chemical industry: syngas production plants and refineries
Coal mining industry: coal mines
Landfill and environmental protection industry: landfills and biogas plants
Laboratories and research institutions
Steel and metallurgy industry
Fermentation and agriculture industry
Industrial methane alarm device technical parameter table:
| Parameter | Specification |
| Gas Detected | Methane (CH₄) |
| Detection Principle | Catalytic Combustion / Infrared |
| Measuring Range | 0–100%LEL or 0–5%Vol (optional) |
| Resolution | 1%LEL |
| Alarm Thresholds | Low: 20%LEL, High: 50%LEL (adjustable) |
| Response Time | ≤30s |
| Signal Output | 4–20mA / RS485 / Relay |
| Power Supply | DC 24V (18~30V) |
| Operating Temperature | -20℃ ~ +60℃ |
| Operating Humidity | 10~95%RH (non-condensing) |
| Ingress Protection | IP66 |
| Installation Method | Wall / Pipe / Flange Mounted |
CMC methane gas sensor alarm features:
Honeywell high-sensitivity catalytic combustion/infrared sensor
Real-time concentration display (LED/LCD screen)
Audio-visual alarm/remote signal output (4-20mA, RS485)
Explosion-proof design, suitable for hazardous locations
Supports multiple mounting options and long service life
Installation Instructions for Fixed Natural Gas Alarms:
1.The effective horizontal coverage radius of combustible gas detectors should be 7.5 meters indoors and 15 meters outdoors. One detector can be installed within the effective coverage area.
2.When detecting flammable and/or toxic gases lighter than air, such as methane and hydrogen, the detector should be installed 0.5 to 2 meters above the source of release, and the horizontal distance from the source should be less than 5 meters.
3.Detectors should be located within a 1-meter radius of valves, pipe connections, outlets, or areas prone to leakage, as close as possible without affecting the operation of other equipment.
4.Detectors should be installed in areas where gas is likely to leak, flow through, or accumulate. The installation location should be determined based on various conditions, including the density of the gas being measured, the airflow direction at the installation site, and the temperature.
