Oxygen is an essential important gas for all life. In "fresh air" the Oxygen concentration is 20.9%. Variations of the Oxygen concentrations are extremely seldom. Our organs react very sensitively to a change in the concentration of the air we breath. A 5% change in the Oxygen concentration for example can already cause a breathing problem with humans and can lead to health problems. Small charges in the concentration of oxygen can also lead to the tiredness and loss of concentration. With that the performance ability decreases and the danger of accidents increases

Everywhere the possibility exists that the Oxygen content can change, supervision by the Supervisory Board is required, but also personal responsibilty by continiously monitoring the Oxygen concentration. A fixed system of GfG guarantees the early detection of gas dangers around the clock.