Combustible Gas Indicator

Definition - What does Combustible Gas Indicator mean?

A combustible gas indicator is a device that is used to determine the concentration of flammable vapors in an environment. This device is primarily used in areas where combustible gases such as hydrogen and acetylene have to be sampled. Not all combustible gas indicators or detectors are capable of responding in the same manner to all gases. Therefore, a separate indicator device maybe required for gas reading of a specific combustible gas. The indicator detects the presence of gas in the atmosphere, which can be hazardous when combined with oxygen and air. The indicator does not respond if the oxygen concentration in the environment is less than 10%.

Petropedia explains Combustible Gas Indicator

Many industries, including the petroleum industry use a combustible gas indicator, which is a device used to detect the presence of flammable or combustible gases in an environment. There is a flammable limit for every gas, and a combustible gas indicator tests for this limit in the gas vapors in an environment. To do so, the indicator requires sufficient amount of oxygen so as to detect the LFL (lower flammable limit) of gas in the air. The indicator has a needle set on it that takes the reading, starting from a 0 to far right back. If the indicator gives off a reading of 10% and above, then the atmosphere is potentially combustible.

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