US 11,674,940 B2
System and method to avoid the influence of ozone for a gas sensor
Christian Meyer, Dresden (DE); Debra Deininger, Longmont, CO (US); Clayton Kostelecky, Longmont, CO (US); Ronald Schreiber, Freital (DE); Holger Saalbach, Radebeul (DE); and Ravi Kanth Reddy Chilumula, Longmont, CO (US)
Assigned to Renesas Electronics America Inc., Milpitas, CA (US)
Filed by Renesas Electronics America Inc., Milpitas, CA (US)
Filed on Dec. 15, 2020, as Appl. No. 17/122,761.
Claims priority of provisional application 62/952,841, filed on Dec. 23, 2019.
Prior Publication US 2021/0190750 A1, Jun. 24, 2021
Int. Cl. G01N 33/00 (2006.01)
CPC G01N 33/0039 (2013.01) [G01N 33/0016 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of operating a gas sensor, comprising:
setting power to a heater in contact with a MOx sensor to provide a temperature that is at a low temperature below a threshold temperature below which an ozone concentration is reduced;
holding the temperature at the low temperature below the threshold temperature for a period of time to reduce ozone concentration in a gas sample in contact with the MOx sensor;
increasing power to the heater to increase the temperature of the MOx sensor to an operating temperature;
acquiring resistance data from the MOx sensor at the operating temperature; and
processing the resistance data to provide a result related the gas sample.