Larger air speeds generate more reasonable pressures. Either the pressure lines must be run from the wind tunnel into the control room or pressure sensing must be done in the tunnel and electrical signals sent back. Both situations present their own set of problems. Mensor supplied sets of two digital pressure gauges. These gauges were placed in the control room and connected using existing pressure lines to the wind tunnel.
Pressure ranges varied based on the air speed capability of the wind tunnel.
One unit was typically a barometric range device used to measure the static pressure and the other was a gauge, differential, or bi-directional device used to measure the impact pressure. The DPGs displayed the static pressure and the impact pressure in the control center. The digital outputs of the DPGs were also connected to a data acquisition system that calculated the actual airspeed and provided a permanent record of the data.