Based on the Doppler radar principle, the BB-200 provides a compact and
reliable method of detecting a person approaching an exhibit. Unlike
passive infra-red (PIR) detectors used in burglar alarms and driveway
lights, the low power radar beam may be aimed to cover a specific area.
Also, the range, or sensitivity, is easily adjustable from approximately 3
to over 15 feet (1 to 5 meters). The result is that the exhibit is started
only when a person is within the appropriate range. A switch-selected
option reduces the possibility of activation when a person walks away from
the BB-200, making it more attuned to a person approaching.
The BB-200 operates from 12 to 24 Volts, either AC or DC, drawing 100 mA.
If this power is not available from elsewhere in the exhibit, a wall mount
plug-in transformer, Model ATW-1220, is available, capable of power up to
In general, the BB-200 should be mounted above, and aimed at, the area to
be covered. A green LED light visible on the BB-200 lights when motion is
sensed, aiding in the adjustment process. Prior to final mounting it is
recommended that the BB-200 be powered up and temporarily placed in the
proposed location to ensure proper operation.
The BB-200 may be mounted behind common non-metallic building materials
such as plywood, MDF, Plexiglass or drywall.