Hydraulic comparison test pumps have a screw press and a built-in pump to generate high pressures appropriate for high-volume applications. They compare the pressure gauge being calibrated against a master test gauge to verify accuracy. These pumps are portable and test various fluids including mineral oil, sebacate, and distilled water.

Electronic deadweight testers function as a field tester or in-situ, offering complete calibration. Deadweight testers apply a specific mass to the piston to help verify the accuracy of the machine being tested. These testers have a built-in reference pressure transducer and provide a percentage to notify the workload coverage on a pressure device. They are used in meteorology, instrument shops, and calibration labs.

Liquid lubricated pneumatic deadweight testers utilize an oil-lubricated piston assembly and an external pressure source like compressed air to calibrate, eliminating the risk of contamination when compared to standard pneumatic deadweight testers. Deadweight testers apply a specific mass to the piston to help verify the accuracy of the machine being tested.