An obvious application is detection of flammable gases. Danger is there where leaks from the main net or joints require operators to enter narrow rooms for maintenance works. Gas pipelines may leak in areas where operators must enter for maintenance purposes, such as welding, so LEL is to be monitored before any operation.
Methane (CH4): dangerous methane concentrations which may create need to be monitored in every point of the pipeline where methane flows, not only in closed rooms, depending on the quantity of likely leakage.
CH4: methane is a simple hydrocarbon and is in nature in form of gas. Methane is the main component of natural gas and is an excellent fuel, able to form easily in atmosphere resulting in a high risk of explosion.