DIFF Subgroup
G08B 17/11 using an ionisation chamber for detecting smoke or gas
Introduced: January 1990
Full Title
Fire alarms; Alarms responsive to explosion > Actuation by presence of smoke or gases > using an ionisation chamber for detecting smoke or gas
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 1990.
Child Classifications
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