What can be installed in buildings or process areas to alert when flammables are detected at a certain level?

The correct response refers to a fire eye, which is specifically designed to detect the presence of flammable gases or vapors in an environment. Fire eyes utilize infrared technology to sense the presence of flammable materials and can provide an early warning when concentrations reach a predefined threshold. This is crucial in preventing potential fires or explosions in settings where flammable substances are handled or stored.

Heat detectors, while effective in sensing rises in temperature, do not specifically monitor for the presence of flammable gases. Smoke alarms and smoke detectors are designed primarily to detect smoke from combustion, which may not always correlate with the presence of flammable vapors. Therefore, in the context of identifying specific hazardous flammable levels, a fire eye is the most appropriate and specialized tool for this task.