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Patent No: US5866075 [USA] Application No: 998654
Title: Device useful for sensing ammonia and nitrogen oxides(s) gases at room temperature
Issue Date: 02-02-1999 File Date: 29-12-1997
Inventor(s): Gupta, Ram Pratap; Vyas, Purushottam Das; Gergintschew, Zenko; Schipanski, Dagmar
IPC Classification: G01N 027/00
Abstract: A device for sensing ammonia (NH3) and nitrogen oxide (NOx) gases comprising: a sensor for detecting said ammonia and said nitrogen oxide gases, said sensor including a substrate and a layer consisting of cuprate material for detection of said ammonia and said nitrogen oxide gases, wherein said layer of cuprate material is selected from the group consisting of Y:Ba:Cu:O (YBCO) and Bi:Sr:Ca:Cu:O (BSCCO); a sensor holder for supporting said sensor; a perforated cap positioned over said sensor, said perforated cap having openings for passage of said ammonia and said nitrogen oxide gases to said sensor; a detection circuit communicating with said sensor for measuring output from said sensor; and a display or recording device connected to said detection circuit for displaying or recording a concentration of said ammonia and said nitrogen oxide gases based on the output from said sensor.

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Industrial Applications Devices and Equipments [Environmental (Clean Tech)] Sensors [Electronics]