US 11,754,496 B2
FTIR spectrometer with cut-off filter for hydrogen sulfide detection
Martin L. Spartz, Ellington, CT (US); Anthony S. Bonanno, Ellington, CT (US); and Kelly Renee McPartland, West Hartford, CT (US)
Assigned to MLS ACQ, Inc.
Filed by MLS ACQ, Inc., East Windsor, CT (US)
Filed on Oct. 1, 2021, as Appl. No. 17/449,715.
Application 17/449,715 is a continuation of application No. 16/819,853, filed on Mar. 16, 2020, granted, now 11,143,589.
Claims priority of provisional application 62/818,988, filed on Mar. 15, 2019.
Prior Publication US 2022/0018760 A1, Jan. 20, 2022
Int. Cl. G01B 9/02 (2022.01); G01N 21/3518 (2014.01); G01N 33/00 (2006.01); G01N 21/35 (2014.01)
CPC G01N 21/3518 (2013.01) [G01N 33/0044 (2013.01); G01N 2021/3595 (2013.01); G01N 2201/1247 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A Fourier transform infrared spectrometry system for measuring hydrogen sulfide, comprising:
a source for generating light;
an interferometer for receiving the light;
a sample cell containing a gas sample;
a detector for detecting the light after passing through the sample gas; and
a bandpass filter for filtering light prior to being detected by the detector, the light transmitted by the bandpass filter detected by the detector including 3,700 cm−1 and/or 2,700 cm−1.