Ionisation chambers

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Tubes for determining the presence, intensity, density or energy of radiation or particles > Ionisation chambers

CPC:

Tubes for determining the presence, intensity, density or energy of radiation or particles ( ; photoelectric discharge tubes not involving the ionisation of a gas H01J40/00 ) > Ionisation chambers

CPC subdivides this area 5x more granularly than IPC with 4 additional codes.

4 codes are CPC-only extensions.

IPC defines codes here since 1980.

Child Classifications

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H01J 47/022 CPC only CPC only
H01J 47/024 CPC only CPC only
H01J 47/026 CPC only CPC only
H01J 47/028 CPC only CPC only
H01J 47/04 Capacitive ionisation chambers, e.g. the electrodes of which are used as electrometers since 1980 IPC+CPC Available in IPC and CPC