The use of combustible gas detection in hazardous locations

This document explores the use of combustible gas detection as a means of supplementary protection in hazardous locations. The use of combustible gas detection in the context of a hazardous area classification design is reviewed and its use as a means to interlock ignition capable equipment is discussed. IEC and North American codes, standards and recommended practices are referenced. A case example is provided to illustrate the use of concepts presented.