A pressure distribution measuring system with pneumatic switches and automatic band selection

A pressure distribution measuring system is described which has been implemented on the basis of a commercial data processing and measuring system using pneumatic switches of the valve type. The system features automatic band selection, which is achieved by using a special sensor. The system has 44 channels with excess pressure bands of (2.5, 1.0, 0.16, and 0.016) x 10 exp 5 Pa and rarefaction bands up to 0.6 x 10 exp 5 Pa; the system processes at a rate of 1-5 channels per second with an accuracy to within 0.5 percent.