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Verification and Calibration Services

ISO/IEC 17025:2017
Accreditation: AC-1402


Our Pressure calibration system is based on our primary force standards, and the effective area of our deadweight piston gauges.

Our pressure loading weights are calibrated to our reference mass standards through comparisons using mass comparators. These working standards become our primary force standards for producing pressure when corrected for local gravity and air bouancy effect. Local gravity has been measured and certified at our calibration laboratory.

Deadweight Pressure Pistons have their effective area calibrated directly by INMS/NRC. High pressure piston covers a range of 500 psi to 10000 psi, Low pressure piston covers a range of 30 psi to 500 psi, and our ultra low pneumatic pressure piston covers a range of 0 psi to 30 psi.
VACUUM pressures are calibrated using our 0 to 1000 torr MKS BARATRON measuring system

Precise determination of effective area of a deadweight piston gauges is accomplished using cross float techniques.

Transducer Transfer Standards along with precision amplifier and best fit linearization software are calibrated to our primary deadweight pressure testers. These pressure transfer standards have their expanded uncertainty calculated with a confidence level of not less than 95%.

Our PRESSURE CALIBRATION SYSTEM maintains appropriate reference standards, working standards, check standards and calibration processes. The uncertainty of these calibration systems have been quantified. Assessment and monitoring is an ongoing activity with results fully documented.