Secondary Pressure Standards are instruments that are used to calibrate other pressure instruments, but relies on a more stable primary pressure standard such as a dead weight tester to check that the required level of accuracy is maintained.
For example an electronic pressure calibrator that uses a pressure transducer inside would be classed as a secondary pressure standard because the pressure transducer output characteristics will change over time and use.
Pressure calibration products
30 psi absolute portable calibration data logging air pressure gauge with 1/4 NPT male fitting
LEO 2 (Ei) Digital Manometer- Theme park ride pneumatic controls digital pressure test gauge
PGS40 Mid Pressure Calibration Hand Pump
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