The PUSC system allows efficient operation according to the air quantity used. A semiconductor pressure sensor quickly detects a change in pressure, and the microcomputer selects either "pressure switch" or "automatic unloader" system automatically (patent pending).
The microcomputer converts the signal from the pressure sensor for digital display of pressure.
Use of the PUSC system eliminates the need for a vertical type air tank that was required with the former pressure switch system. (If a large volume of air is needed momentarily, then the vertical type air tank is recommended.)