IPC Subgroup
G08B 13/26 by proximity of an intruder causing variation in capacitance or inductance of a circuit
Introduced: September 1968
Last revised: January 2006
Full Title
Burglar, theft or intruder alarms > Electrical actuation > by proximity of an intruder causing variation in capacitance or inductance of a circuit
Classification Context
- Section:
- PHYSICS
- Class:
- SIGNALLING
- Subclass:
- SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS