Explosion Proof Online Gas Detector
System Background
In power construction projects, deep foundation pit operations for transmission tower foundations are a fundamental and critical process. Due to the complex and variable geological conditions at work sites, the large workload, and the numerous hazardous factors that are difficult to observe and identify, safety accidents can easily occur during construction.
The environmental monitoring control cabinet collects real-time data on concentration changes of combustible (CH4) and toxic/hazardous (CO/O2/H2S) gases inside the foundation pit. Once the alarm threshold is reached, it immediately alerts workers in the pit and relevant safety supervisors, and ventilates the pit by activating fans and other devices to ensure construction safety.
Solution
System Advantages
1
Improve integrated intelligent remote monitoring and management capability
2
Enhance the safety of foundation pit operations
3
Improve on-site production quality
Gas Detector Technical Parameters
| Item | Parameters |
| Detected gases | Combustible gas / H2S / O2 / CO |
| Detection range | Ex: 0-100% LEL, H2S: 0-100 PPM, O2: 0-30% VOL, CO: 0-1000 PPM |
| Resolution | Ex: 0.1% LEL, H2S: 0.1 PPM, O2: 0.1% VOL, CO: 1 PPM |
| Detection principle | Ex: catalytic combustion; H2S/O2/CO: electrochemical |
| Indication error | ≤ ±3% FS |
| Alarm mode | Audible and visual alarm |
| Zero drift | ≤ ±1% (F.S/year) |
| Recovery time | ≤ 30 s |
| Sampling method | Diffusion type / pump-suction type |
| Response time | ≤ 30 s (T90) |
| Display | Industrial LED color display |
| Housing material | Die-cast aluminum |
| Explosion-proof rating | Ex d IIC T6 Gb |
| Protection rating | IP66 |
| Power supply | DC 24 V |
| Signal output | RS485 |
| Device functions | 1. Imported sensor with high accuracy; 2. Two-level alarm settings; 3. Plug-and-play modular design |