CPC Main Group
H01J 47/00 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 )
9 direct subcodes
Child Classifications
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- H01J 47/02 Ionisation chambers
- H01J 47/06 Proportional counter tubes
- H01J 47/08 Geiger-Müller counter tubes
- H01J 47/10 Spark counters (H01J47/14 takes precedence; spark gaps H01T)
- H01J 47/12 Neutron detector tubes, e.g. BF3 tubes
- H01J 47/14 Parallel electrode spark or streamer chambers; Wire spark or streamer chambers