US 12,228,556 B2
Gas sensor
Daniel Tobjork, Cambridgeshire (GB); Pascal Cachelin, Cambridgeshire (GB); and Robert Archer, Cambridgeshire (GB)
Assigned to Sumitomo Chemical Co., Ltd., Tokyo (JP)
Appl. No. 17/911,514
Filed by Sumitomo Chemical Co., Ltd., Tokyo (JP)
PCT Filed Mar. 12, 2021, PCT No. PCT/EP2021/056322
§ 371(c)(1), (2) Date Sep. 14, 2022,
PCT Pub. No. WO2021/185690, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. PCT/GB2020/050667 (WO), filed on Mar. 16, 2020.
Prior Publication US 2023/0358714 A1, Nov. 9, 2023
Int. Cl. G01N 33/00 (2006.01)
CPC G01N 33/0047 (2013.01) [G01N 33/0014 (2013.01); G01N 33/0016 (2013.01); G01N 33/0031 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A gas sensor apparatus comprising a gas inlet configured to draw gas from an environment into the gas sensor apparatus; a first gas sensor; a first gas flow path between the inlet and the gas sensor; a humidifier disposed between the gas inlet and the gas sensor in the first gas flow path of the gas sensor apparatus, wherein the humidifier is configured to form a humidifier-treated gas having a predetermined humidity level by humidification of the gas drawn from the external environment; and a dehumidifier disposed between the humidifier and the first gas sensor in the first gas flow path, wherein the dehumidifier is configured to dehumidify the humidifier-treated gas having the predetermined humidity level and wherein the first gas sensor is configured to detect the presence or concentration of a target gas in the environment, the target gas being an organic compound.