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Special Tests of Long Length Standards

A 3 meter optical length standard under calibration.

A 3 meter optical length standard under calibration.

The Dimensional Metrology Group (683.01) provides special tests on a fee for service basis of long length standards upon customer request. The group performs a feasibility study of all requests to determine if we can provide an appropriate calibration.

In the past, the Dimensional Metrology Group has provided special tests and length calibrations for fiber optic cables standards over 1 km in length, for special 5 m length rods used in the nuclear power industry, and for ball bars up to 3 meters in length.


Uncertainties for special tests are dependent on the type of calibration performed and are computed on a case by case basis. To discuss special tests please call the Dimensional Metrology Group contact listed.

Other Special Tests in the Dimensional Metrology Group >>

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Physical Measurement Laboratory (PML)
Engineering Physics Division

Dimensional Metrology Group (683.01)
Daniel S. Sawyer, Calibration Coordinator
301-975-5863 Telephone

General Information:
James R. Bowie, Secretary
301-975-3468 Telephone
301-975-5360 Facsimile

100 Bureau Drive, M/S 8211
Gaithersburg, Maryland 20899-8211