Which equipment is typically used to monitor gas levels in confined spaces?

The most appropriate equipment for monitoring gas levels in confined spaces is the combustible gas indicator. This device is specifically designed to detect the presence of flammable gases and vapors, ensuring that safety measures can be taken to prevent hazardous situations like explosions or asphyxiation.

In confined spaces, where ventilation may be limited and gas accumulation can occur, the combustible gas indicator provides real-time readings of gas concentrations. It typically has alarms that alert workers when gas levels exceed safe limits, allowing for prompt action to mitigate risk. This tool is invaluable for maintaining safety and compliance with occupational health standards in environments where dangerous gases may be present.

Other mentioned equipment, while useful in different contexts, do not serve the same function. Gas chromatography is a laboratory technique used to analyze chemical compositions and is not suitable for real-time monitoring in confined spaces. A vapor recovery unit is utilized primarily in industrial processes to collect vapors emitted and is not specifically a monitoring device. A pressure gauge measures pressure levels rather than gas concentrations, making it inappropriate for detecting gas levels in confined areas. Thus, the combustible gas indicator is the best choice for ensuring safety in these environments.