Patent ID: 7570162

Claim:
A security system comprising: a control; and a sensor attachable to an article to be monitored, the sensor having a plurality of different states among which are at least an armed state and a breached state, the sensor and control interacting so that the control causes a detectable signal to be generated as an incident of the sensor being changed from the armed state into the breached state, the sensor having a housing comprising a wall structure bounding a cavity, the sensor further comprising a source of illumination that projects light, the source of illumination comprising an encapsulating bulb that is separate from the wall structure on the housing, the wall structure comprising a portion made from a light transmissive material through which light from the illumination source projects from within the cavity to be visible externally of the wall structure over a substantial area thereof, the source of illumination projecting light from within the cavity through the light transmissive portion with the sensor in at least one of the plurality of states to thereby provide a visual indication externally of the wall structure that the sensor is in the at least one of the plurality of different states.