UKAS Lab 0625 | Humidity Calibration
Humidity probe and hygrometer calibration
10 to 90% RH
humidity range
+15 to +40°C
temperature range
3-day
fast-track available
0625
UKAS Lab · ISO/IEC 17025:2017
What is humidity probe calibration?
Humidity probe and hygrometer calibration at Labcal
Humidity probe calibration compares the relative humidity reading of a probe, hygrometer or transmitter with traceable reference standards inside a controlled environmental chamber. The certificate shows the actual error at each humidity point, so you can trust the conditions you record.
Humidity sensors age faster than most instruments. Contamination, condensation and chemical exposure all change the sensor, and drift of a few percent RH between calibrations is common. In cleanrooms, stability chambers and storage areas, that drift decides whether you are in or out of specification.
Labcal calibrates humidity probes, hygrometers and transmitters from 10% to 90% RH at +15°C to +40°C, and 15% to 90% RH between +10°C and +15°C. Built-in temperature sensors can be calibrated in the same chamber from -5°C to +60°C.
Instruments we calibrate
- Combined temperature and humidity probes
- Handheld hygrometers and thermohygrometers
- Humidity transmitters
- Dew point sensors
- Relative humidity controllers
- Probes for environmental monitoring systems
If your instrument is not listed, contact us and we will confirm suitability.
Relative humidity
10% to 90% RH at +15°C to +40°C
Temperature (in chamber)
-5°C to +60°C
Typical manufacturers
Vaisala · Rotronic · Testo · Michell Instruments · TSI · Fluke · HygroPalm · RS PRO
Holding the air still enough to measure it
Humidity cannot be applied like a pressure or a voltage. It has to be generated and held steady in a chamber, with temperature controlled at the same time, before any comparison means anything.
Your probe sits in the chamber with our reference standards while we step through the humidity points you need, and temperature can be calibrated in the same run.
From your bench to a UKAS certificate
Send it in
Courier your instruments to our Lymington laboratory, or ask us to arrange collection for larger batches.
Calibrated in the chamber
Your probe is compared with our traceable references at each humidity point, with temperature calibrated in the same run if needed.
Certificate back
A UKAS certificate with results and measurement uncertainty at every point. Average 7 working days, 3-day fast-track by arrangement.
Why humidity sensors need regular calibration
GMP evidence for critical conditions
Cleanrooms, stability storage and warehouses all depend on humidity records an auditor will check.
Humidity and temperature together
One chamber run and one certificate for combined probes.
Short time away
Average 7 working days, with a 3-day fast-track by arrangement.
Industries Served
Who needs humidity probe calibration?
Humidity control is a compliance requirement wherever environmental conditions affect product quality and safety.
Accreditation
UKAS Lab 0625 · ISO/IEC 17025:2017
Labcal is independently accredited by the United Kingdom Accreditation Service. Our UKAS humidity certificates are accepted by audit teams across regulated industries.
Common Questions
Questions about this calibration service
Straight answers to what quality managers and engineers ask most before sending instruments to Labcal.
What is humidity probe calibration?
Humidity probe calibration compares a probe’s relative humidity reading with traceable reference standards inside a controlled environmental chamber. The certificate records the error and measurement uncertainty at each humidity point. UKAS accreditation means the laboratory has been independently assessed against ISO/IEC 17025:2017.
What humidity range do you calibrate?
Our UKAS-accredited humidity calibration covers 10% to 90% RH at temperatures from +15°C to +40°C, and 15% to 90% RH between +10°C and +15°C. If you need points outside that range, contact us and we will advise.
Can you calibrate the temperature sensor in my humidity probe too?
Yes. Temperature sensors built into humidity instruments can be calibrated in our environmental chambers from -5°C to +60°C, usually in the same run as the humidity points.
How often should humidity probes be calibrated?
Annual calibration is common in GMP, cleanroom and HVAC applications. Because humidity sensors can drift faster than many instruments, some users calibrate critical probes every six months, based on drift seen in previous certificates.
Calibration quote
Get a price for humidity probe and hygrometer calibration
Tell us what needs calibrating and our lab will come back with a price and turnaround estimate.
- UKAS accredited laboratory, Lab 0625
- 7 working days average turnaround from receipt
- Express 3-day service when you need it back fast
All humidity instrument types covered under UKAS Lab 0625.
Switching labs? Send us your current certificate and we will quote a like-for-like service in 24 hours. No switching cost.