burglar alarm

(redirected from Silent Alarm (moved))
Also found in: Dictionary, Thesaurus.

burglar alarm

[′bər·glər ə¦lärm]
(engineering)
An alarm in which interruption of electric current to a relay, caused, for example, by the breaking of a metallic tape placed at an entrance to a building, deenergizes the relay and causes the relay contacts to operate the alarm indicator. Also known as intrusion alarm.