Pressure gauges – calibration

What is calibration?


  • Calibration is the process of checking, by comparison with a standard, the accuracy of a measuring instrument and provides corrections which can be applied to the readings obtained in use.


  • Deadweight testers are used to calibrate pressure measuring instruments; they use calibrated weights to apply known pressures to a device under test.


Why should I calibrate my pressure gauge?


  • By comparing an instrument of a known value against a second instrument (unit under test), the difference can be calculated, and suitable corrections determined.


  • A calibration provides the user with confidence that the instrument they are using works correctly.


  • Without periodic calibration, an instrument may drift out of the manufacturer’s specification without anyone realising and lead to incorrect test results



How often should I calibrate my pressure gauge?


  • We recommend getting your instrument calibrated at least every 12 months, however the calibration frequency for a specific gauge is up to the user. It should be based on:


–  The environment in which the instrument is used

–   The frequency of use

–  Any evidence of changes or trends in calibration data


  • The user must decide what is the consequence of an incorrect reading and schedule the calibration frequency accordingly.



What calibration options do I have?


  • In Brannan’s calibration laboratory we are able to calibrate instruments up to 700 bar.


  • Our calibrations are carried out at 5 points, spread across the full range of the gauge.


  • We offer both UKAS & Traceable Calibration Certificates.



To find out more about calibration for your pressure gauge, please contact



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