E field balanced phase intrusion alarm

Details E field balanced phase intrusion alarm E field balanced phase intrusion alarm

G - Physics

08

B

340/125

G08B 13/22 (2006.01)

Patent

CA 1141839

ABSTRACT OF THE DISCLOSURE An intrusion alarm is provided having one or more pairs of sense wires wherein each of a pair of sense wires leads to a balanced circuit whereby there is no alarm output if both of the sense wires are subjected to the same perturbation. Thus, false nuisance alarms are avoided.

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