1. A space monitoring detector comprising: an inductive loop spanning a plurality of storage spaces wherein each of the plurality of spaces can accommodate an object from a collection of objects of nonuniform size and weight; a predetermined threshold inductance value associated with occupancy of all of the plurality of spaces spanned by the inductive loop; an electronic processor for measuring an aggregate loop inductance value; a processing step of comparing the measured aggregate loop inductive value with a predetermined threshold inductance value to determine when all of the plurality of monitored spaces are occupied.