Vacuum gauges calibration

Vacuum gauges calibration

Tradelab performs the calibration of vacuum gauge with ENAC (ILAC) accreditation, whether they are direct or indirect reading (transmitters).

The vacuum gauges measure the vacuum pressure in absolute pressure units.

Its range of use is normally below 1 mbar absolute. The most common are capacitive (the most accurate), thermal conductivity (the most economical) and hot and cold cathode ionization (those with the lowest measurement range).

The calibration of vacuum gauges is performed by comparison with Baratron type standard equipment, using a vacuum chamber to achieve a stable vacuum value and a turbomolecular pump to generate the vacuum.

In the calibration of vacuum gauges, as a general rule, we perform three series of measurements of at least three calibration points each.

We include the maximum and minimum points of measurement of use.

If the range to calibrate covers several decades of pressure, the calibration points are logarithmically spaced. We calibrate as a general rule a minimum of two values ​​for each decade.

The ENAC (ILAC) vacuum gauge calibration is carried out only in the Tradelab laboratory of Montmeló. Calibration can be done on-site but without Enac (ILAC) accreditation.

For manometers  in negative pressure gauge,  consult  pressure gauges.

ENAC (ILAC) calibration

  • Calibration of direct reading vacuum gauges within the range from 0.1 Pa (0.001 mbar) to 1335 Pa (13.35 mbar) of absolute pressure.
  • Calibration of vacuum transmitters and other types of non-direct reading instruments within the range from 0.1 Pa (0.001 mbar) to 1335 Pa (13.35 mbar) of absolute pressure.
  • Calibration uncertainty (k = 2): 1% + 0.2 Pa for values ≥10 Pa and 2.5% + 0.05 Pa for lower values.
  • For higher ranges consult absolute pressure meters (barometers).
  • For more information refer to the calibration annex:

Data needed to perform a calibration budget

  • Brand and model of the instrument to calibrate.
  • Minimum and maximum range of use.
  • Calibration place (in laboratory or on-site).

Tradelab performs the calibration of other measuring instruments with ENAC (ILAC) accreditation, in addition to the calibration of vacuum gauges.

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