PAUL CHARLES CLIFFORD
Pilots at Channing Ave, Palo Alto, CA
License number
California A4403353
Issued Date
Jul 2015
Expiration Date
Jul 2017
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
1020 Channing Ave, Palo Alto, CA 94301
Professional information
Selective Gas Detection And Measurement System
US Patent:
4542640, Sep 24, 1985
Filed:
Sep 15, 1983
Appl. No.:
6/532651
Inventors:
Paul K. Clifford - Palo Alto CA
International Classification:
G01N 2712
US Classification:
73 23
Abstract:
A gas detecting system for determining the presence and concentrations of a number of selected toxic, combustible, or reducing gases in an atmosphere. The system includes a plurality of semiconductor gas sensors, each of which differs from each of the others in its response to at least one of the selected gases. The system includes a means of processing the responses of each sensor to produce an indication of each of the gas concentrations. The system may also produce indications of the measurement accuracy of each gas concentration, which can be used to determine the presence of gases not selected for detection.