A discussion of “legal metrology” and what Weights & Measures regulatory officials do to ensure equity and secure confidence in the marketplace.  While metrology laboratories deal in verifications, calibrations, applications of uncertainties and traceability to national and international standards, the resulting field standards are used to reach far beyond grocery store scales and gasoline pumps in assuring “certainty” for both buyers and sellers at all levels of daily commerce.  A look at what we all take for granted…. but shouldn’t. 

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