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A digital vacuum gauge is a device for measuring pressure in rarefied gases. The device is used for the study of chemical and physical processes in the steel, chemical industry, for setting up machine units. It is used to evaluate the performance of electronic lamps, when filtering various media. In this article we will consider the principle and features of the device, its purpose and the specifics of the choice. Technical specifications: To measure vacuum in medium and highly discharged environments, it is necessary to select sensitive equipment. The device must have the following characteristics: Wide range of measured pressure (from 10-3 torr); High sensitivity: up to 1 atm; Absence of rubbing mechanical parts; Support for different display units: torrs, pascals, mmHg Support for different display units: torrs, pascals, mmHg; Visual electronic display; Insignificant power consumption.