Abstract: A luminometer for assaying bioluminescence and chemiluminescence reactions characterized by sample wells having transparent bottom walls, a light detector positioned beneath the sample wells and a reagent injector above the wells.

Abstract: A microprocessor controlled system for monitoring, storing and periodically reporting on data pertinent to the commercial operation of a reporting system, such as a soft drink vending machine, to a central data collection and monitoring computer, and which periodically reports such data over a telephone line which it accesses on a nondedicated basis. The microprocessor controls operations of the telelink system, and stores in memory data related to the overall status of the commercial operation of the reporting system, such as totals, inventory, etc. Reporting system status sensors are provided for reporting on the status of the reporting system without interrupting normal operation thereof, such that a problem with the operation of or a malfunction of the telelink system does not adversely affect operation of the reporting system.

Abstract: Dispensing of commodities such as bulk liquids, gases, granules and powders is monitored electronically by identifying receivers of the commodities with specific codes and relating those codes to amounts dispensed by commodity dispensers. The specific apparatus includes a passive module attached to the commodity receiver and a reader linked to the commodity dispenser by radio transmitter or hard-wired. The passive module includes a planar member therein with a code thereon in form of a pattern of conductive and non-conductive areas, the particular organization of which determines the code identifying a particular commodity receiver. The reader includes: an array composed of pairs of opposed inductors for alignment with the conductive and non-conductive areas; a multiplexer for indexing the pairs of opposed inductors to determine if an area is conductive or non-conductive, and a transmitter for relaying the code to the commodity dispenser.