Calibration Certificates

UKAS Certificate of Calibration from ETI on a white background

Calibration certificates for temperature & humidity

Calibration is an important part of using a thermometer for critical checks. Having a calibration certificate to verify the accuracy of your instruments provides greater confidence and security in your readings. At ETI, we have an in-house UKAS laboratory for temperature and humidity calibration.

ETI Calibration Services

What is a calibration certificate?

All thermometers are prone to drift after time, which is when their readings become less accurate. Calibration tests confirm the accuracy of a thermometer's readings. During the test, the thermometer's measurements will be compared with a traceable device or reference thermometer.

A calibration certificate is an official document to show the results of the calibration test. This will prove the accuracy of your thermometer or show that it needs recalibrating. If it needs to be recalibrated, you will receive fresh documentation afterwards to show this.

Do new ETI thermometers come with calibration certificates?

All of the thermometers manufactured in our factories in the UK are either sold with a free calibration certificate or have the option to purchase a UKAS certificate on top if desired.

Please note that adding an optional certificate to your order will delay the delivery time by 7-10 days / 10-14 days dependant of certificate type, to allow the calibration process to take place.

Types of calibration certificates

There are two types of thermometer calibration certificates: traceable and UKAS.

Traceable calibration certificate from Electronic Temperature Instruments Ltd on a white background

Traceable certificate

Shows your thermometer has been tested against a thermometer within the traceability chain.

The traceability chain is a string of thermometers which leads back to the highest-level reference thermometer in a national calibration centre (or equivalent).

UKAS Certificate of Calibration from ETI on a white background

UKAS certificate

Shows a thermometer has been tested in a UKAS-accredited laboratory.

UKAS is the National Accreditation Body for the United Kingdom. Tests in UKAS-accredited laboratories are completed to the highest standard in the country.

ETI UKAS Laboratory

Learn about our accrediations and capabilities.

UKAS Laboratory