How to Choose an ISO/IEC 17025 Accredited Calibration Lab in Bangladesh

Almost every calibration provider’s marketing says “ISO certified.” Almost none of that tells you what you actually need to know: can this lab produce a measurement result you can defend in an audit? The credential that answers that question is narrower and more specific than most buyers realise, and it is worth two minutes to check before you sign a contract.

The credential that actually matters

For a calibration certificate to carry real technical weight, the laboratory needs to be accredited to ISO/IEC 17025 by a recognised accreditation body — in Bangladesh, that is the Bangladesh Accreditation Board (BAB). This is a different, much narrower assessment than ISO 9001. ISO 9001 checks whether a company is well managed. ISO/IEC 17025 checks whether a specific laboratory, for a specific list of parameters, produces measurement results that are traceable, uncertainty-quantified and technically defensible. A vendor can hold ISO 9001 and still not be independently verified on the number that ends up on your certificate.

Six questions to ask before you sign

1. Is the exact parameter I need inside their accredited scope? Accreditation is granted per parameter and range, not as a blanket company-wide claim. A lab accredited for pressure may not be accredited for temperature, mass or dimension. Ask to see the schedule of accreditation, not just the certificate.
2. What is the stated measurement uncertainty? “Accurate” is a marketing word. “Measurement uncertainty of ±0.008 bar” is a technical fact you can compare against your own process tolerance.
3. Are their reference standards traceable? Every reference standard in the chain should trace back to a national or international metrology institute, with its own valid calibration certificate — ask to see it, not just be told it exists.
4. Does the certificate report as-found and as-left readings? A certificate that only says “Pass” hides the data you need to judge drift and set your next interval. As-found/as-left figures are what a competent lab reports as standard.
5. Can they test on-site as well as in-lab? Large, fixed or process-critical equipment (dead weight testers, autoclaves, HVAC systems) often cannot be sent to a lab. Confirm on-site capability and calibrated portable references before you need it urgently.
6. Does their turnaround match your audit calendar? An accredited lab with a six-week backlog is not useful if your certificate expires before your buyer audit. Ask for a realistic lead time in writing.

Red flags we see in the market

• A certificate that never states a measurement uncertainty, anywhere.
• A logo styled to resemble an accreditation mark, with no verifiable accreditation number quoted.
• Identical boilerplate wording across every certificate regardless of instrument type — a sign of a template being filled in, not a technical process being followed.
• No mention of which specific standard(s) or working instructions were used for the calibration.

How to verify a lab’s accreditation yourself, in two minutes

Do not take a vendor’s word for it. The Bangladesh Accreditation Board publishes a searchable directory of accredited laboratories at bab.gov.bd — search the lab’s name, open its current schedule of accreditation, and confirm your specific parameter and range is actually listed. A lab that is genuinely accredited will have nothing to hide about this; most will publish their certificate and scope on their own website too.

An auditor does not ask if your calibration provider is “good.” They ask if the provider is accredited for the exact parameter on the certificate in front of them. Have that answer ready before the question is asked.

ION Engineering is independently BAB-accredited to ISO/IEC 17025:2017, and our full schedule of accreditation — every parameter, range and measurement uncertainty we are qualified for — is published on our calibration capabilities page. If you are comparing providers for an upcoming audit, send us your instrument list and we will confirm exactly what falls inside our accredited scope, free of charge.