IPC Subgroup
G08B 17/11 using an ionisation chamber for detecting smoke or gas
Introduced: January 1990
Last revised: January 2006
Full Title
Fire alarms; Alarms responsive to explosion > Actuation by presence of smoke or gases > using an ionisation chamber for detecting smoke or gas
Classification Context
- Section:
- PHYSICS
- Class:
- SIGNALLING
- Subclass:
- SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
1 direct subcode
Child Classifications
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- G08B 17/113 Constructional details