Force Indicators and Transducers                                          NVLAP Logo

The ORNL Metrology Laboratory maintains the capability to calibrate and adjust force indicators and transducers.  All calibrations are performed using standards traceable to NIST.   Typical types of force equipment calibrated by the ORNL Metrology Laboratory include analog and digital crane scales, dynamometers and load cells in both tension and compression modes.

The ORNL Metrology Lab provides accredited calibrations for any force parameters within the ranges detailed in our Scope of Accreditation. In addition, traceable non-accredited calibrations are available for force calibrations from a range of 1040 to 100,000 lbf.

The tables below list both our accredited and non-accredited capabilities. See the following link Scope of Accreditation for the entire listing.

If you have questions about our force capabilities, please contact the ORNL Metrology Laboratory for additional information.
Force Tension and Compression
(NVLAP Code: 20/M06)

Force Tension/Compression


Best Uncertainty (+/-) *



0 to 1040 lbf

0.0044% of reading

Dead Weight Method

103 to 1000 lbf 0.0018% + 0.35 lbf Hydraulic Press/Load Cells Yes
200 to 10,000 lbf 0.0025% + 3.5 lbf Hydraulic Press/Load Cells Yes
622 to 25,000 lbf 0.0023% + 8.7 lbf Hydraulic Press/Load Cells Yes
5920 to 100,000 lbf 0.0010% + 3.5 lbf Hydraulic Press/Load Cells Yes

* Represents and expanded uncertainty using a coverage factor, K=2, at an approximate level of confidence of 95%.


Any reference to “accredited” or “accreditation” refers to the National Voluntary Laboratory Accreditation Program (NVLAP) and applies to calibration services only as performed by the Oak Ridge National Laboratory’s (ORNL) Metrology Laboratory (Lab Code 200159-0). Refer to the ORNL NVLAP scope of accreditation for details.”

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