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.

Pneumatic comparison test pumps employ a pressure and vacuum pump to verify the accuracy of pressure-measuring devices against a master test gauge. These pumps can be affixed to a bench.

Vacuum-operated pneumatic deadweight testers utilize an external pressure source like compressed air to calibrate, which eliminates 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.

These air-operated single Pressure Control Unit (PCU) pneumatic deadweight testers ensure that a single pressure control unit is setting and measuring pressure accurately. Deadweight testers apply a specific mass to the piston to help verify the accuracy of the machine being tested and an air source is required to help float the weights. Applications include oil and gas, refining, and chemical industries.

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.

These air-operated dual Pressure Control Unit (PCU) pneumatic deadweight testers ensure that a dual pressure control unit is setting and measuring pressure accurately. Deadweight testers apply a specific mass to the piston to verify the accuracy of the machine being tested, and an air source is required to help float the weights. Applications include oil and gas, refining, and chemical industries.