The RMLD-IS model is manufactured by Sewerin, and is a methane leak detector in the first generation of laser gas detection devices. It can be utilized to check areas that are difficult to access.
There is a laser beam that passes through a methane cloud and absorbs a specific range of the infrared lights, which makes it possible to detect the leak from a safe distance. It is intended for detecting methane and has no cross-sensitivity with respect to other hydrocarbons.
The unit has a gas concentration that is measured according to the amount of the infrared light absorbed by the gas. It has measurement at a distance of up to 30 m, that has audible alarm and additional error message on the display.