Accredited calibration laboratory finder
State the range, the uncertainty you need and what you are sending for calibration. See which accredited laboratories cover it, with the CMC and accreditation number behind every match.
How the calculation works
- 01Each laboratory's real, published accreditation scope lists a CMC (Calibration and Measurement Capability) — the smallest expanded uncertainty it can report, at k = 2 — per instrument type and range; a match is ruled out when the requested range falls outside every on-file scope entry, or when the CMC is not good enough for the requirement.
- 02General accreditation for a parameter (e.g. "temperature") is never treated as proof of coverage for the specific instrument type and range asked about — a laboratory can hold a real UKAS or A2LA accreditation and still not have an on-file scope entry for what you need, and that case is reported explicitly rather than silently matched.
- 03A laboratory's record that has not been independently human-verified against its current published schedule can never reach the top match tier, however good the numbers on file look.
- 04Every threshold used is returned with the result, so a match can be audited rather than taken on trust.
Limitations
- The catalog behind this is a small, individually-cited starter set of real laboratories, not a directory — a laboratory not appearing here may still be exactly right for your work.
- It is not a purchasing or contracting decision, and not a substitute for confirming the exact scope and CMC directly with the laboratory or the accreditation body before sending equipment.
- Temperature only. The same structure extends to other parameters, but no other parameter is seeded yet.
- Unlike most tools here, this one sends what you enter to our server, because the matching logic and the laboratory records live in the tested engine rather than in the browser.
Frequently asked questions
- Does a laboratory not showing up mean it isn't accredited for this?
- No. This catalog holds a small number of real, individually-cited laboratories read from their own published UKAS or A2LA accreditation documents — not a scrape of every accredited laboratory. Absence here means this catalog has not been told about that laboratory yet, not that it lacks the right accreditation.
- What is CMC in a laboratory's scope of accreditation?
- Calibration and Measurement Capability: the smallest expanded uncertainty (conventionally at k = 2, about 95% confidence) the laboratory can report for a given instrument type and range under near-ideal conditions. Your own certificate's stated uncertainty will usually be larger, since it also depends on your specific device.
- A laboratory is accredited for temperature — is that enough?
- Not by itself. Accreditation is granted per scope entry: a specific instrument type over a specific range, at a specific CMC. A laboratory accredited for RTDs from 0 to 165 °C is not thereby accredited for a furnace at 900 °C, even though both are "temperature". This tool checks the specific scope entry, not just the general accreditation.
- Why does a match say "requires verification"?
- Every laboratory record in this catalog was read from a real published document but has not been independently re-checked by a human against the laboratory's current schedule — schedules do change. Treat a strong match as a well-sourced starting point, then confirm the live scope before committing.
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How to choose a calibration laboratory
Check the accreditation scope for the exact quantity, range and uncertainty you need; then evaluate turnaround, certificate quality and how they handle out-of-tolerance findings.
How to read a scope of accreditation
A scope lists, per quantity, the range, the calibration and measurement capability (CMC) and the method. Reading it tells you whether the laboratory can certify what you need — and at what uncertainty.
Accreditation bodies and the ILAC MRA
National accreditation bodies assess laboratories to ISO/IEC 17025; the ILAC Mutual Recognition Arrangement makes their accredited certificates equivalent across borders.
On-site vs laboratory calibration: choosing the right one
On-site calibration avoids removing equipment and captures the installed system; laboratory calibration offers better sources, lower uncertainty and controlled conditions.