Professional UKAS Calibration for Temperature & Humidity Instruments
Get UKAS-accredited calibration services for your measurement instruments at ETI’s laboratories based in Worthing, West Sussex. Precise, professional results with fast turnaround times.
Why Choose ETI’s Calibration Services?
UKAS Certification
High accuracy calibration for any temperature instrument or humidity meter.
Rapid Turnaround
Completed within 5-8 days or 10-14 days, depending on the certificate type.
Wide Temperature/Humidity Ranges
-200 °C to 1372 °C for thermometers alone, or -100 °C to 250 °C with probes. 10 to 90 %RH for humidity.
Experienced Professionals
Skilled technicians with over 65 years of combined experience ensure every calibration is carried out to the highest standards.
Precise Measurement Capabilities
Certified CMC uncertainties from ±0.027 °C, with calibration certificates covering 1–5 temperature points.
Bespoke Services Available
Can’t see your requirements on our price list? Contact us to discuss your needs.
Instruments We Calibrate
Thermometers and Probes
UKAS 3 or 5-point calibration for thermometers and probes, separately or as a system. All types included, from any brand.
Infrared Thermometers
Traceable 5-point calibration for infrared devices.
Test Caps & Simulators
UKAS calibration for test caps and temperature simulators, used for on-site accuracy checks.
Data Loggers
UKAS 3 or 5-point calibration for USB and WiFi data loggers with any sensor/probe type.
Humidity Meters
UKAS 3-point calibration for hygrometers and humidity probes.
Industrial Instruments
Traceable 3-point calibration for moisture meters, manometers and anemometers.
Our UKAS-Accredited Laboratory
Most of our calibrations are carried out in ETI’s own UKAS-accredited laboratory in Worthing, West Sussex. This ensures UKAS-tested instruments meet the highest standards, with traceable, reliable results.
On-Site Calibration Equipment
Businesses should regularly check the accuracy of their instruments so they know when to send them for recalibration. We stock a range of equipment for calibration checks, from budget-friendly ice bath mugs to high-accuracy dry well calibrators.
New to Calibration?
View our Calibration Guide for support with choosing your calibration points, certificate types and on-site calibration equipment.
Frequently asked questions
How often should I calibrate my instruments?
How often you get your thermometers or humidity meters calibrated depends on how precise your application is, how often you use them, what you use them for, and any relevant regulatory guidelines.
Generally, you should check the accuracy of your instruments once a month and get them recalibrated a few times a year.
Do you offer bespoke calibration?
Yes, contact us to discuss your bespoke calibration needs.
Do you calibrate instruments made by other brands?
Yes, you can send instruments by any brand to us for recalibration, not just ones made by ETI.
What is UKAS calibration?
UKAS calibration means your thermometer has been tested and certified in a laboratory accredited by the United Kingdom Accreditation Service (UKAS). It provides official certification that equipment meets national and international standards.
Learn more about our UKAS laboratory.
Can I calibrate my instruments myself?
You can check the accuracy of your thermometers yourself. However, if the accuracy needs to be adjusted, you’ll usually have to send the thermometer to a laboratory for professional recalibration.
If you have a thermometer with a CalCheck function, you can make accuracy adjustments yourself. However, unlike professional calibration, you won’t have a certificate to prove your thermometer is accurate.
Shop calibration equipment to check your thermometer's accuracy.
How long does ETI calibration take?
Turnaround times depend on the service you choose. Most calibrations are completed within 5–14 working days —visit our pricing page to see how long each service takes.
I’m not sure what calibration options to choose. What should I do?
We’re happy to help if you’re unsure which calibration services you require. Contact us to discuss your needs, and we’ll provide recommendations and a quote.
You can also read our Calibration Guide for support with your processes.
How much do ETI’s calibration services cost?
Visit our pricing page to view our price list or get a quote.
What Measurement Capabilities (CMC) Does ETI Offer?
We offer high measurement capabilities, from ±0.06 °C to ±0.42 °C for thermometers and ±0.2 to ±1.1 %rh for humidity meters.
View our full CMC table on our UKAS laboratory page.
Do I need to send separate instruments and probes for calibration together?
Yes, in most cases, we recommend sending both your instrument and probe together for calibration. This ensures they are tested as a complete system. If only one part is calibrated, the overall reading may still be inaccurate, as both components can influence the final measurement.