US 11,668,687 B2
Combustion analyzer with dual carbon monoxide and methane measurements
Pavel Shuk, Copley, MN (US); and Chad M. McGuire, Shakopee, MN (US)
Assigned to Rosemount Inc., Shakopee, MN (US)
Filed by Rosemount Inc., Shakopee, MN (US)
Filed on Sep. 30, 2019, as Appl. No. 16/587,805.
Prior Publication US 2021/0096116 A1, Apr. 1, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G01N 33/00 (2006.01); G05B 15/02 (2006.01)
CPC G01N 33/0031 (2013.01) [G01N 33/0006 (2013.01); G01N 33/0063 (2013.01); G05B 15/02 (2013.01)] 18 Claims
OG exemplary drawing
 
17. A combustion analyzer comprising:
an oxygen sensor configured to sense the presence of oxygen in a combustion process and generate a first sensor signal indicative of the concentration of oxygen in the combustion process;
a dual carbon monoxide-methane sensor configured to sense the presence of carbon monoxide or methane in the combustion process and generate a second sensor signal indicative of a concentration of carbon monoxide or a concentration of methane in the combustion process; and a controller configured to determine the concentration of oxygen based on the first signal and compare it to a threshold, wherein the controller selectively generates a control signal, based on the comparison, to heat the dual carbon monoxide-methane sensor to 600° C.