A comparison of gauge blocks has been carried out in the Asia/Pacific Region as part of an international comparison decided on by the Comité Consultatif pour la Définition du Mètre. Ten national standards laboratories measured a set of five grade 00 gauge blocks (and two replacements) using interferometry. This paper reports on the comparison and shows that for gauge block lengths up to 40 mm (original set) all laboratories agreed to within ±0,03 µm and for the 100 mm gauge block they agreed to within ±0,08 µm.
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Brown et al. (1996) studied this question.
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