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1. Standard length metrology instruments
1.1 Place of standard instruments in industry
With the invention of the fringe-counting interferometer and the three-dimensional measuring machine, many thought that everyday instruments would be consigned to the museum.
Today's inspectors and metrologists still use calipers, micrometers and comparators of all kinds. They're always present, but they're often kept in cupboards, and only come out to resolve a manufacturing dispute or a problematic "out-of-tolerance" issue.
They are used in manufacturing and workshop control, from small and medium-sized industries to large groups. They can be found in every sector of activity, from the automotive, armaments, aeronautics and nuclear industries, to non-mechanical sectors: plate micrometers...
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Standard length metrology instruments
Hand-held instruments
References
Standardization
Association française de normalisation AFNOR
- Spécification géométrique des produits (GPS). Comparateurs à levier mécaniques. Spécifications. Méthodes d'essais. - XP E 11-053 - Déc. 2000
- Instruments de mesurage de longueur. Comparateurs mécaniques à cadran, à tige rentrante radiale. Spécifications. Méthodes d'essais. - NF E 11-050 - Déc. 1990
- Spécification géométrique des produits (GPS). Comparateurs...
Manufacturers
Vernier calipers, sliding depth gauges :
Roch Lunéville France, Brown and Sharpe Group
TESA (Switzerland), Brown and Sharpe Group
Etalon (Switzerland), Brown and Sharpe Group
Sylvac (Switzerland): digital calipers
Mahr (Germany)
...
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