US 12,306,127 B2
System and method for multi-gas sensing at a single operating temperature
Radislav Alexandrovich Potyrailo, Niskayuna, NY (US); and Janell Marie Crowder, Clifton Park, NY (US)
Assigned to GE Infrastructure Technology LLC, Greenville, SC (US)
Filed by General Electric Company, Schenectady, NY (US)
Filed on Jul. 7, 2022, as Appl. No. 17/859,874.
Prior Publication US 2024/0011928 A1, Jan. 11, 2024
Int. Cl. G01N 27/22 (2006.01); G01N 1/44 (2006.01); G01N 33/00 (2006.01); H05B 3/02 (2006.01)
CPC G01N 27/221 (2013.01) [G01N 1/44 (2013.01); G01N 33/0016 (2013.01); G01N 33/0027 (2013.01); G01N 33/0031 (2013.01); H05B 3/02 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A gas sensor system for multi-gas analysis of a fluid sample, comprising:
a gas sensing element configured to contact the fluid sample;
a heating element coupled to the gas sensing element and configured to heat the gas sensing element;
a first heating element controller operatively coupled to the heating element and configured to provide a predetermined constant voltage to the heating element while the gas sensing element contacts the fluid sample;
a second heating element controller operatively coupled to the heating element and configured to provide an additional adjustable voltage to the heating element while the gas sensing element contacts the fluid sample, wherein a combination of the predetermined constant voltage and the additional adjustable voltage is used to heat the heating element to a constant temperature; and
a measurement circuit operatively coupled to the gas sensing element and configured to provide a dielectric excitation to, and to measure dielectric excitation responses of, the gas sensing element while the gas sensing element is heated to the constant temperature and contacts the fluid sample, wherein the dielectric excitation responses are used to provide an enhanced differentiation between at least two gases in the fluid sample.