Purge testing is crucial when installing or replacing a natural gas pipeline or exposing an area to a new test gas. This clears the affected area of other gases that may mix with the new gas, which can lead to combustion or make the gas mixture more hazardous to employees. Conventional gas detectors not properly fitted for purge testing may encounter shortened sensor life and damage due to excessive exposure. Conventional Gas Detectors utilize an LEL sensor that generally reads from 0-100% LEL (effectively 2.5% Vol). A high pressure gas line may contain up to 100% VOL, which would disable a typical catalytic bead sensor in seconds. If teams do not perform purge testing, their gas detection equipment may get damaged or produce inaccurate readings.