From the observation bunker Kai Holtappel provides his colleagues with some last minute information shortly before the test starts.
Source: BAM, Bild: Michael Danner
The test is being filmed using a camera...
… and the gas leaving the container and its distribution is measured using sensors.
It is often more than an experiment. For example, different factors influencing the gas distribution such as wind or the container's own fan are considered and measured separately.
Inconspicuous and somewhat reminiscent of a brassy comic character: the "command centre" where the test series data are recorded on a PC.