Gas lock and coating apparatus with a gas lock

The present invention relates to a gas lock for separating two gas chambers, which makes it possible to achieve with minimal effort, the spatial separation of gases without contact with the product / starting material / transportation system. The gas lock according to the invention is characterized in that a measuring chamber for measuring at least one integrated physical and / or chemical property. Also, the present invention relates to a coating apparatus, comprising a gas lock according to the invention. Also uses the gas lock according to the invention are given.