Edmunds Universal Internal/External (ID/OD) Comparator is designed and manufactured to the highest standards, and are in use at respected calibration labs around the world. This unit is primarily used to calibrate class X, XX and XXX master rings, and is also ideal for checking master plugs, discs and high precision parts. The Universal Comparator offers a wide capacity internal measurement range of .040 inches (1 mm) to 12 inches (305 mm), and external measurements up to 11 inches (280 mm). They perform with outstanding repeatability and accuracy within .000001 inch. Edmunds also offers a complete calibration kit, including three class XX ring gages, certification traceable to N.I.S.T and ISO compliance procedures.
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A New Dimension In Precision Measurement