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PCE
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DIFF Subgroup
G01N 21/27

using photo-electric detection (G01N21/31 takes precedence)

Introduced: January 1980

Title

Titles differ between systems:

IPC: using photo-electric detection

CPC: using photo-electric detection (G01N21/31 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light > Systems in which incident light is modified in accordance with the properties of the material investigated > Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands > using photo-electric detection

CPC:

Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light (G01N3/00 - G01N19/00 take precedence) > Systems in which incident light is modified in accordance with the properties of the material investigated (where the material investigated is optically excited causing a change in wavelength of the incident light G01N21/63) > Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands > using photo-electric detection (G01N21/31 takes precedence)

Of 2 combined children, 0 exist in both systems.

2 codes are CPC-only extensions.

Child Classifications

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