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PCE
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DIFF Subgroup
G01J 1/50

using change in colour of an indicator, e.g. actinometer

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Photometry, e.g. photographic exposure meter > using chemical effects > using change in colour of an indicator, e.g. actinometer

CPC:

Photometry, e.g. photographic exposure meter (spectrophotometry G01J3/00; specially adapted for radiation pyrometry G01J5/00 ) > using chemical effects > using change in colour of an indicator, e.g. actinometer

No child classifications to compare. This is a leaf node in both IPC and CPC.