In many areas gases are used as technical production aid. The gases are stored, transported or accumulate as waste product. Often these gases are toxic (poisonous) and therefore can cause a problem. Most toxic gases can not be detected by the human senses. The smallest concentrations can cause acute poisoning or long term health problems.

The values TLV ( Threshold limit value) and TGC ( Technical guideline concentration) provide guidelines about the highest gas concentrations that people in the work place can be exposed to. Supervision by the Supervisory Board but also the personal responsibility for the people requires a continuous monitoring of toxic gases.

A fixed gas warning devise of GfG guarentees, around the clock, the early detection of gas dangers. A fixed gas warning devise consists of a gas transmitter and a controller (GMA) which is connected to each other by a measuring cable