公开(公告)号：US10113957B1

公开(公告)日：2018-10-30

申请号：US15834816

申请日：2017-12-07

Applicant: KOREA NATIONAL UNIVERSITY OF TRANSPORTATION Industry-Academic Cooperation Foundation ,  HUMAS. CO.LTD

Inventor： SeungHwan Yi ,  Keun Heon Lee ,  Hyeong-Gee Yeo ,  Jin Ho Kim

IPC: G01N21/3518 ,  G01N21/47 ,  G01N33/00

Abstract: Provided is a white-cell type non-dispersive infrared gas sensor and more particularly, a non-dispersive infrared carbon dioxide gas sensor deposited with a hydrophobic thin film. To this end, in a carbon dioxide gas sensor for measuring a concentration of carbon dioxide included in gas, the gas sensor is a white-cell type, in the white-cell, first and second reflectors 120 and 130 are disposed to face a third reflector 140, a light source 110 is provided at one side of the third reflector 140 and a first detector 150 and a second detector 160 are provided at the other side. Further, a first hydrophobic thin film 122 may be deposited on the entire reflection surface of the first reflector 120, a second hydrophobic thin film 132 may be deposited on the entire reflection surface of the second reflector 130, and a third hydrophobic thin film 142 may be deposited on the entire reflection surface of the third reflector 140.