What active fire prevention measure can detect flammable gas buildup?

The gas monitor is specifically designed to detect the presence of flammable gases in the environment. These devices are equipped with sensors that continuously measure gas concentrations and can alert personnel when they exceed predetermined safety thresholds. This is crucial for preventing fire hazards, as the buildup of flammable gas can lead to explosive situations if not addressed promptly.

In contrast, smoke detectors are primarily focused on detecting the presence of smoke, which indicates combustion but does not specifically monitor for flammable gases. Heat detectors respond to increases in temperature typically associated with a fire, but they do not provide information on gas levels. Fire sprinklers are part of an active fire suppression system that activates when a fire occurs, but they do not monitor for potential hazardous gas buildup. Thus, the gas monitor is the most appropriate choice for detecting flammable gas.