In a Controlled Atmosphere environment this composition is modified in such a way as to create, inside suitable spaces, new gas compositions made up by N₂, O₂, CO₂, which are continuously controlled by means of electronic gas analyzers.

According to the aims required, differentiated plants are designed, to offer different features:

• In the field of the conservation of fruits and vegetables as well as food products, the aim is to reduce their metabolism and aging processes, in order to prolong their shelf-life and to maintain their organoleptic qualities (aspect, taste, texture, etc.) as long as possible and in the best possible way.
• In fire prevention systems, the reduction of oxygen by nitrogen supply inhibits combustion
• In pest controls operations, the reduction of the oxygen content aims at eradicating infesting insects on or in stored products and artifacts.
• In industrial applications, oxidation processes are prevented.

In time the concept of Controlled Atmosphere (CA) underwent a constant evolution and refinement at the same pace as overall industrialization and mechanization progressed, as well as the continuous in-depth University research and changing consumer needs. With respect to the ULO (Ultra Low Oxygen) technique of the former millennium, the DCA (Dynamic Controlled Atmosphere) method shows a clear improvement in quality.