MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS

Introduced: September 1968

Description

G01B covers instruments and methods for measuring linear dimensions, including length, thickness, and diameter of objects using mechanical, optical, or electronic principles. It encompasses angle measurement devices (goniometers, protractors), area determination techniques, and surface irregularity assessment tools such as profilometers and roughness gauges. This subclass includes calibrated rulers, calipers, micrometers, dial indicators, laser measurement systems, and coordinate measuring machines used across manufacturing quality control, engineering, and metrology applications. Adjacent classes like G01C address angular measurements in surveying contexts, while G01D covers general electric/electronic measuring instruments.

Of 12 combined children, 10 exist in both systems.

2 codes are CPC-only extensions.

Note: 2 CPC extensions are marked as secondary classification only.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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G01B 1/00 Measuring instruments characterised by the selection of material therefor IPC+CPC Available in IPC and CPC
G01B 11/00 Measuring arrangements characterised by the use of optical techniques +1 CPC IPC+CPC Available in IPC and CPC
G01B 13/00 Measuring arrangements characterised by the use of fluids IPC+CPC Available in IPC and CPC
G01B 15/00 Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons (characterised by the use of optical techniques G01B9/00, G01B11/00) IPC+CPC Available in IPC and CPC
G01B 17/00 Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations IPC+CPC Available in IPC and CPC
G01B 21/00 Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant since 1980 IPC+CPC Available in IPC and CPC
G01B 2210/00 Aspects not specifically covered by any group under G01B, e.g. of wheel alignment, caliper-like sensors 2nd only +11 CPC CPC only CPC only
G01B 2290/00 Aspects of interferometers not specifically covered by any group under G01B9/02 2nd only +13 CPC CPC only CPC only
G01B 3/00 Measuring instruments characterised by the use of mechanical techniques +1 CPC IPC+CPC Available in IPC and CPC
G01B 5/00 Measuring arrangements characterised by the use of mechanical techniques +9 CPC IPC+CPC Available in IPC and CPC
G01B 7/00 Measuring arrangements characterised by the use of electric or magnetic techniques +3 CPC IPC+CPC Available in IPC and CPC
G01B 9/00 Measuring instruments characterised by the use of optical techniques IPC+CPC Available in IPC and CPC