John C. Schmidt - Baltimore MD Donald N. Campbell - Timonium MD Sandra B. Clay - Baltimore MD
Assignee:
Allied Corporation - Morristown NJ
International Classification:
G01N 2746
US Classification:
204412
Abstract:
An electrochemical gas detection cell, particularly suitable for detecting H. sub. 2 S, includes an electrochemical gas sensor which has a reference electrode, a sensing electrode and a counter electrode. The counter electrode is composed of carbon. The sensing electrode is composed of either gold or platinum and the reference electrode is composed of platinum. Circuitry is provided to supply voltage to the electrodes, the sensing electrode bias can be held below 300 mv. , with respect to the reference electrode. The agent H. sub. 2 S can be readily detected when the bias is about 250 mv. The cell is associated with signal processing circuitry which produce audible and visual outputs. A nonaqueous electrolyte is provided. The electrolyte may be composed of either propylene carbonate or n-methyl-2-pyrrolidone and one of conductive compatible salts, such as tetrabutyl ammonium tetrafluoroborate.
John C. Schmidt - Baltimore MD Donald N. Campbell - Timonium MD Sandra B. Clay - Baltimore MD
Assignee:
Allied Corporation - Morristown NJ
International Classification:
G01N 2746
US Classification:
204412
Abstract:
An electrochemical gas sensor is described for detecting a gas constituent, for example hydrazine in a gas ambient incorporating an electrochemical cell including a reference electrode, counter electrode and sensing electrode spaced apart and with an electrolyte in contact with each electrode and comprising n-methyl-2-pyrrolidone and a salt soluble therein, for example tetraalkyl ammonium salt. The invention overcomes the problem of specificity, service life and operating temperature range associated with aqueous electrochemical gas sensors.
2010 to 2000 Lead Respiratory TherapistWalter Reed Army Medical Center Sleep Clinic Washington, DC 2004 to 2010 Clinical CoordinatorWalter Reed Army Medical Center Sleep Clinic Owings Mills, MD 2004 to 2006 Respiratory Care PractitionerChildren's Healthcare of Atlanta Atlanta, GA 1997 to 2004 Respiratory Therapist IIIMartha Jefferson Hospital Charlottesville, VA 1996 to 1997 Respiratory TherapistChildren's National Medical Washington, DC 1989 to 1995 Respiratory Therapist
Education:
California College for Health Sciences 1989 to 1993 A.S.Prince Georges Community College Largo, MD 1989 to 1990Virginia Union University Richmond, VA 1983 to 1986
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