The present invention is a protective rotatable enclosure for the sensitive internal
electrical and mechanical components of a surveillance camera scanner system that
is particularly suited for deployment in an inverted position. The invention includes
a sloped mounting base with an optional annular lip, a stepped relationship between
the mounting base and the rotary spindle, and at least one O-ring seal. The invention
also has the ability to set and adjust the limits of the scanning arc(s) of the
scanner enclosure through the use of one or more fixed-position magnetically operable
electronic sensors located inside the enclosure which are triggered by one or more
external magnetic actuators adjustably deployed on the rotatable enclosure.
