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NABL Calibration Lab Search Verification: A Guide to Online Verification

How to Verify the Authenticity of a NABL Calibration Lab 17025 Compliant

NABL (National Accreditation Board for Testing and Calibration Laboratories) ensures that calibration labs in India adhere to international standards. With numerous labs claiming NABL accreditation, verifying their authenticity is crucial. Here’s a step-by-step guide to conducting NABL Calibration Lab online verification effectively.

1. Check the NABL Official Website

NABL maintains an updated NABL Calibration Lab list for easy verification. To confirm a lab’s accreditation:

  • Visit NABL’s official website: https://www.nabl-india.org

  • Navigate to the “Accredited Labs” section

  • Search using the lab’s name, certificate number, or calibration scope

  • If the lab appears in the results, verify its accreditation details, validity, and approved calibration standards.

2. Verify the NABL Certificate

Every NABL-accredited calibration lab receives a certificate that includes:

  • NABL Logo & Accreditation Number

  • Lab Name and Address

  • Calibration Parameters Covered

  • Expiry Date of Accreditation

  • QR Code for Quick Verification

Use your mobile device to scan the QR code and confirm the certificate’s authenticity. Always cross-check the certificate details on the NABL website to ensure they match.

3. Check for the NABL Symbol on Calibration Reports

A valid NABL-accredited calibration report must contain:

  • NABL Logo

  • Accreditation Number

  • Calibration Standards Followed

  • Signature of Authorized Personnel

  • A QR Code for Online Verification

If any of these elements are missing, the report may not be from an authentic NABL-accredited lab.

4. Contact NABL for Confirmation

If doubts persist, reach out to NABL directly:

5. Ask the Lab for Proof of Accreditation

A legitimate NABL-accredited calibration lab should provide:

  • NABL accreditation number

  • A valid NABL accreditation certificate

  • Proof that their calibrations fall under NABL’s approved scope

6. Beware of Fake NABL Accreditation Claims

To avoid fraudulent claims, always:

  • Verify NABL accreditation through the official NABL website.

Do not trust printed certificates or calibration reports without online verification
  • Ensure the presence of a QR code for instant authentication.

7. QR Code Verification for Calibration Reports

For additional security, NABL calibration lab issued calibration certificate can be verified online at:

If a calibration report lacks a QR code or is unavailable on the verification portal, request the lab to upload it to the system. This enhances trust and ensures compliance with NABL Calibration standards.

Final Thoughts

Verifying the authenticity of a NABL-accredited calibration lab is essential for accurate and reliable calibration results. By following these steps, you can ensure a lab’s NABL accreditation status and its compliance with ISO/IEC 17025 standards.

For transparency and reliability, always choose a NABL-accredited calibration lab that offers easy online verification through NABL’s QR code system. This builds confidence and trust with clients and industry stakeholders.


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