Patent ID: 6921990

Claim:
An electronic monitor for detecting the presence and absence of a locking bar that mates with a cabinet with the presence thereof preventing the opening of one or more drawers being housed by said cabinet, said electronic monitor comprising: a first electrode fixed at a predetermined location on said locking bar; current sensing network comprising; source of electrical excitation having first and second ends; current sensor having first and second ends and generating an output upon detecting current flow with the first end thereof connected to said second end of said source of electrical excitation; second and third electrodes spaced apart from each other with the second electrode connected to said first end of said source of electrical excitation and said third electrode connected to said second end of said current sensor, said second electrode and third electrode being located in a predetermined manner so as to come into contact with said first electrode when said locking bar mates with said cabinet; and a transmitter connected to said output of said current sensor and generating a predetermined signal of a selected communication link upon said detection of a change in said current flow.