The vacuum pressure comparator is fitted with a differential pressure port that enables connection of gauges under test by hose.

It combines the functions of three pressure pumps and minimizes the number of equipment carried for on-site calibration.

HS702 & HS703 is China's first portable pneumatic comparator developed by Huaxin. It can generate pressure for gauge calibration from vacuum to 60bar.

Internally installed air oil separator keeps the pump body free from oil contamination and makes it easy to maintain.

Extensive applications of the pressure comparator have been found in power, chemical, oil, metallurgy, metering and other industries.