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Method and apparatus for phase for and amplitude detection

United States Patent

*** EXPIRED ***
June 9, 1998
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A new class of techniques been developed which allow inexpensive application of SAW-type chemical sensor devices while retaining high sensitivity (ppm) to chemical detection. The new techniques do not require that the sensor be part of an oscillatory circuit, allowing large concentrations of, e.g., chemical vapors in air, to be accurately measured without compromising the capacity to measure trace concentrations. Such devices have numerous potential applications in environmental monitoring, from manufacturing environments to environmental restoration.
Cernosek; Richard W. (Albuquerque, NM), Frye; Gregory C. (Cedar Crest, NM), Martin; Stephen J. (Albuquerque, NM)
Sandia Corporation (Albuquerque, NM)
08/ 322,119
October 12, 1994
This invention was made with Government support under Contract DE-AC04-94DP85000 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.