Patent ID: 8248088
Filing Date: 2012-08-21
Classification: G01N

Abstract:
1. A monitoring apparatus comprising at least one electronic module having at least one DC voltage measurement range; at least one DC current measurement range; at least one AC voltage measurement range; at least one AC current measurement range; a low voltage threshold trigger circuit; a high voltage threshold trigger circuit; a supervisory microprocessor unit; at least one analog range switching circuit under control of the supervisory microprocessor unit; at least one programmable gain amplifier under the control of the supervisory microprocessor unit; a radio frequency module selection circuit under the control of the supervisory microprocessor unit; at least one short range transceiver to transmit data and receive instructions to nearby neighbor module; an antenna switch under the control of the supervisory microprocessor unit to connect the short range transceiver to an antenna; wherein the at least one programmable gain amplifier remotely monitors AC and DC voltages and currents on pipelines and other metallic structures to prevent electrolytic corrosion.