UKAS Lab 0625 | Air Velocity Calibration
Pitot tube calibration
0.1 to 50 m/s
air velocity range
7
Working day average turnaround
3-day
fast-track available
0625
UKAS Lab · ISO/IEC 17025:2017
What is pitot tube calibration?
Pitot tube calibration at Labcal
A pitot tube measures air speed from the difference between total and static pressure in a moving airstream. Calibration places the tube in a controlled wind tunnel and compares the velocity it indicates with a traceable reference, so you know how the tube behaves across the speeds you measure.
Pitot tubes are simple, but a dented tip, a blocked static hole or a bent stem changes the pressure the tube sees. In duct traverses, stack testing and ventilation audits that error flows straight into every flow rate you report.
Labcal calibrates pitot-static tubes and S-type pitots in multiple wind tunnels across our 0.1 to 50 m/s UKAS air velocity scope. We confirm the reporting format you need, such as velocity error or tube coefficient, when we quote.
Instruments we calibrate
- Pitot-static tubes (L-type)
- S-type pitot tubes
- Ellipsoidal-nose pitot tubes
- Pitot tubes with integrated temperature probes
- Pitot tubes paired with digital manometers
- Pitot tubes for stack and duct testing
If your instrument is not listed, contact us and we will confirm suitability.
Air velocity range
0.1 to 50 m/s
Typical manufacturers
Airflow · TSI · Testo · Kimo · Dwyer · Furness Controls · ATP
The tip sees the wind, the manometer tells the truth
Air arriving at the tip of a pitot tube stops, and its pressure rises above the static pressure along the stem. That difference is what your manometer reads and what your velocity is calculated from.
We calibrate the tube in the airstream it was designed for, so the certificate reflects the tube’s real behaviour rather than a theoretical coefficient. If you use the tube with a particular manometer, send them together.
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 airstream
Your tube is mounted in the wind tunnel and compared with our traceable reference velocity at the points you need.
Certificate back
A UKAS certificate with results and measurement uncertainty at every point. Average 7 working days, 3-day fast-track by arrangement.
Why pitot tubes need calibrating
Stack and duct results that hold
Emissions and ventilation flow rates depend on the tube. A UKAS certificate supports the numbers you submit.
Your tube, not a textbook value
S-type tubes in particular vary from unit to unit. Calibration tells you how your tube behaves, not how one should.
Fast turnaround
Average 7 working days, with a 3-day fast-track by arrangement for testing teams on tight schedules.
Industries Served
Who needs pitot tube calibration?
Pitot tubes are used for duct traverses, stack testing and ventilation checks across industrial and regulated sites.
Accreditation
UKAS Lab 0625 · ISO/IEC 17025:2017
Labcal is independently accredited by the United Kingdom Accreditation Service. Our UKAS pitot tube 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 pitot tube calibration?
Pitot tube calibration compares the velocity indicated by the tube with a traceable reference velocity in a controlled wind tunnel. The results show how the tube performs at each calibrated point, with the measurement uncertainty. UKAS accreditation means the laboratory has been independently assessed against ISO/IEC 17025:2017.
Can you calibrate S-type pitot tubes for stack testing?
Yes. We calibrate S-type pitot tubes as well as pitot-static tubes. S-type tubes are often used for stack emissions testing, where the tube’s own coefficient matters. Tell us the method you work to and the points you need and we will confirm the calibration when we quote.
Should I send my manometer with the pitot tube?
If you always use the tube with the same digital manometer, send both. Calibrating them as a pair gives a certificate that reflects the velocity readings you actually take. If you swap manometers, we can calibrate the tube on its own.
How often should a pitot tube be calibrated?
Annual calibration is common for pitot tubes used in regulated stack testing and ventilation audits. Inspect the tube before each use for dents, blocked holes or a bent stem, and send it for calibration straight away if it has been damaged.
Other air velocity instruments we calibrate
Calibration quote
Get a price for pitot tube 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 air velocity 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.