System for detecting contaminants in compressed gas and supplied air, namely, electronic analyzer devices for measuring, testing, and detecting contaminants in compressed air and supplied air streams

Electronic door closing systems comprised door openers and metal security doors; electromechanical automatic security door turnstiles; electronic apparatus for controlling entrances, namely automatic revolving security doors; electronic security locks and hardware for use therewith

pneumatic locks and pneumatic door sliders in the fields of security and detention systems

Metal security locks for correctional facilities