text: A field panel measurement is based on the registration of an odour plume through the observation of an objective and trained panel. Only the typical odour of a certain company is taken into account during the registration of an odour plume, odours from other sources are neglected. Before the start of a field panel measurement, the panel has to get acquainted with the typical odour(s) of the company. The team starts downwind of the source and tries to cross the direction of the wind in perpendicular at different distances. On a topographical map the locations are marked where the odour was perceived. Using this methodology an idea about the size of the impact area as well as the maximal odour threshold distance can be determined.