The Edelhoff pressure measurement device type Edelhoff deltaP is designed for the measurement of residual pressure within tubular reactors with different size of tubes.

A designated flow of air is fed via a nozzle into the desired tube typically empty or filled with catalyst. The subsequent stagnation pressure at this tube is recorded by the data logger of the machine. The data logger can record pressure values of a larger number of individual tubes. Recordet data values can be extracted from the data logger on to a Windows type PC system for further evaluation.