David G Deik

US Patent:

20060000724, Jan 5, 2006

Filed:

Jul 2, 2004

Appl. No.:

10/882194

Inventors:

Chester Dacres - Columbia MD, US
John Marshall - Fallston MD, US
Dodd Ezzard - Flushing NY, US
Keegan Rodkey - Baltimore MD, US
David Deik - Olney MD, US

Assignee:

DACCO SCI, INC. - Columbia MD

International Classification:

G01F 1/64
G01N 27/26

US Classification:

205790000, 205790500

Abstract:

The present invention relates to using a rectifier, a groundbed consisting of four (4) copper rods, power supply, three (3) copper/copper sulfate (Cu/CuSO) reference electrodes, a data logger for detecting and identifying buried lead (Pb) and copper (Cu) service pipes by their electrochemical potentials. More specifically, the present invention relates to using the electrochemical potentials of lead (Pb) versus copper/copper sulfate (Cu/CuSO) reference electrode (−0.500 volts) and also using the electrochemical potentials of copper versus copper/copper sulfate (Cu/CuSO) reference electrode (−0.200 volts) which is utilized under field (actual, environmental or in situ) conditions in detecting and differentiating buried lead (Pb) service pipes and buried copper pipes which are sometimes attached to the same water meter and cast iron water supply main.