What is a combustible gas indicator used for?

A combustible gas indicator is specifically designed to detect the presence of combustible gases and to measure their concentration in the air, typically expressed as a percentage of the lower explosive limit (LEL). The LEL represents the minimum concentration of a gas in the air that can ignite and cause an explosion if an ignition source is present. Understanding the LEL is crucial for ensuring safety in environments where flammable gases may be present, as it helps prevent potential explosions or fires.

This device is not intended for measuring temperature levels, which falls outside its function. Additionally, it does not assess moisture levels in soil, nor does it test the acidity of liquids, which are tasks assigned to different specialized instruments. The primary function of a combustible gas indicator focuses on gas concentration and explosive limits, making it vital for safety and hazard assessment in various settings such as industrial plants, gas pipelines, and construction sites.