UKAS Humidity Calibration

· certified uncertainties (CMCs) from 0.6 %rh, 0.18 °Cdp & 0.15 °C Air

· rapid turnaround - normally within seven days

· qualified & experienced laboratory personnel

· flexible certification - select the points you need

For Temperature Calibration Click Here!  View a PDF of our certificate by clicking here.


ETI's in-house humidity laboratory is equipped with two of the world's premier humidity chambers together with a high accuracy mirror hygrometer. The Thunder Scientific 2500 humidity chamber uses two-pressure technology to generate controlled humidity conditions, which has long been the recognised standard for instrument calibration, test and verification, along with the new state of-the-art HYGROGEN2 - HG2-XL chamber which generates stable temperature and humidity conditions in rapid time. These methods of generation are a fundamental technology, enabling confidence in traceability to National Standards. This, combined with MBW referenced mirror hygrometers, ensures the standard of calibration is to a very high level. If you then combine this with UKAS Accreditation, and a rapid turnaround of your instrument, you can be sure that the service offered by our humidity laboratory will meet your requirement.

Accurate monitoring of humidity can increase the efficiency of productivity in many aspects of production. An increasing number of employers are also realising the importance of healthy working environments, which includes the control of humidity to help prevent airborne bacteria, eliminate static shocks and reduce eye-strain.

As with most digital equipment, but even more so with hygrometers, there is a tendency for drift over a period of use. Therefore a regular calibration by comparison against Standards, traceable to National Standards, provides confidence in the continued accuracy of your instrument.

ETI's humidity laboratory is also UKAS accredited for air temperature measurement certification. Please see below for calibration and measurement capability (CMC)..

Calibration & Measurement Capability (CMC) 

10 to 90 %rh @ 0 to 65 °C CMC 1.8 %rh
10 to 90 %rh @ 20 to 24 °C CMC 0.6 to 1.0 %rh

dew point
20 to 60°C

temperature in air
0 to 65°C  CMC 0.15°C

Calibration certificates can be added to your shopping basket when purchasing most relevant products by simply selecting the check box alongside. 

For humidity calibration pre-order quotation please click here.

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