Line 4.0 includes modern Gas Detectors designed for use at industrial facilities. They are built on a completely new electronic platform and can be equipped with the most advanced measuring head (‘FL’ or ‘FH’ types) with much better measuring properties to make it possible to achieve halved response times (T90) as compared to existing solutions. Moreover, these heads are furnished with solutions that enable protection of measuring sensors from the impact of environmental factors. Detectors of the Line 4.0 types are fully compatible with existing gas detection systems. Each detector may operate as a component of a Gas Safety System ‘Sigma Gas’ or as a standalone device that can be independently integrated with supervising systems of industrial automation or smart house solutions (e.g. by means of analog signals 4..20 mA, RS-485 bus systems or relay outputs).