公开(公告)号：US11366058B2

公开(公告)日：2022-06-21

申请号：US16758856

申请日：2018-10-05

Applicant: KOREA INSTITUTE OF INDUSTRIAL TECHNOLOGY

Inventor： Chang Yeop Lee ,  Mi Yeon Yoo ,  Sung Hyun So ,  Sae Rom Maeng

IPC: G01N21/39 ,  G01N21/03 ,  G01N21/3504 ,  G01N33/00

Abstract: The invention of the present application relates to a system for accurately measuring fine-dust precursors. Among apparatuses that measure concentrations of NOx and SOx which are precursors of fine dust by use of tunable diode laser absorption spectroscopy (TDLAS), an apparatus that can control a temperature of a measurement cell equipped with prism-type multi-passes by using thermoelectric elements without vibration is provided.