Lixer Tools NIST Traceability vs. Independent ISO Certification

All Lixer Tools products come with a Certificate of Traceability.  Unless indicated as Independent ISO they will come with NIST Traceable Certification. Copies of both Independent ISO and NIST traceable sample certificates are shown below for your comparison.  Independent ISO certification is performed by an independent ISO certified lab.  It is the labs default certification and does not contain the accreditation logo.

If you require certification with the Accreditation Logo please contact us at  This certification costs extra and will require 7-10 days turn around time at the lab.

For the difference between NIST traceable and ISO certifications please realize that NIST traceable refers to the standards used to do the certification. These standards are traceable to NIST.  ISO certifications go one step beyond NIST traceable in that ISO 17025 is a statement as to the competency of the calibration laboratory.  

Recertification time frames of Lixer Tools may vary depending on your inspectors requirements.  For recertification costs see our recertification page.

Some of our tools are only available with NIST traceable certification.  Typically these tools will have lasered calibration lines.  Tape Measures we sell have NIST traceable certification. 

Most of our tools that have milled calibration slots are initially available with NIST traceability, however, recertification of these tools are only available with ISO certification due to the lab we use.

For additional information regarding NIST vs ISO certification please visit

For ISO purposes it must be understood that Accuracy is the degree of conformity of a measured or calculated quantity to its true value. Precision or repeatability is the degree to which a number of measurements or calculations show the same or similar results. The results of a measurement can be accurate but not precise, precise but not accurate; neither; or both. The measurement is valid if it is both accurate and precise. Therefore, having NIST or ISO traceability on your Lixer will assure that any product acceptance or rejection is justified.

For your ISO 9001:2015 Measurement Traceability program, we recommend that your procedure for checking tape measures include the following:

  • *Tape measures should be checked for accuracy with a Lixer at the time of purchase
  • *Tape measures should be checked for accuracy using a Lixer prior to any critical measuring
  • *Tape measure accuracy be verified any time it has been dropped or subjected to abuse
  • *Thermal expansion rates be applied in hot or cold environments
  • *Calibrated tape measures be replaced if they are damaged or worn beyond the stated acceptable range of accuracy
  • *Tape measures should be replaced on a regular interval. Tape measures are subject to stretching of the blade from opening and closing cycles. They also lose accuracy from any bends or twists in the blade.
  • *Records should be maintained.


For more detailed information on how to use Lixer Tape Measure Calibration tools visit our Calibration Procedure page.

It has been common for tape measures to be checked using a steel rule for lack of a better method. The Lixer checks both the push and the pull measurements over the entire surface of the end hook. A steel rule fails to identify the full loss of accuracy from a bent end hook.

Sample Independent ISO Certificate for Gage Block

Lixer Gage Block ISO Sample Certificate

Sample NIST Traceable Certificate for Gage Block

Tape Measure Calibration Tool Sample Certificate

Sample Independent ISO Certificate for Lixer A-Class or Lixer Master  Note: Lixer A-Class will have a 12 month recall, Lixer Master will have a 24 month recall

Sample ISO certificate for Lixer Master Tape Measure Calibration Tool

Sample NIST Traceable Certificate for Lixer A-Class or Lixer Master

Tape Measure Calibration Tool Sample Certificate

Sample Independent ISO Certificate for Bench Lixer Square

Bench Square Certificate

Sample NIST Traceable Certificate for Tape Measures

Information included on tape measure certificates will vary depending on tape measure model and length

Sample Tape Measure Certificate


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Thank you for your interest in Lixer Tools. If you have further questions or need additional information please email us at