Replacement chart strips are available for barographs (portable drum recorders) from Messgeräte Burger GmbH. These chart strips are used to record welding work on natural gas service connections in accordance with UVV and DVGW regulations. The chart strips are compatible with the following device models: 030 and 030/230. The respective device number can be found on the base plate of your Burger device. The chart number can be found at the bottom of the chart paper.