Title:
NITROGEN OXIDE MEASURING DEVICE
Document Type and Number:
Japanese Patent JP2020118531
Kind Code:
A
Abstract:
To provide a nitrogen oxide measuring device with which, even when measuring a low-concentration gas after measuring a high-concentration gas, it is possible to quickly obtain the accurate nitrogen oxygen concentration of the low-concentration gas.SOLUTION: A nitrogen oxide measuring device in one embodiment comprises an intake port (2) for taking in a sample gas and a first converter (14) and a second converter (16) provided independently of each other as converters for oxidizing or reducing nitrogen oxide in the sample gas using a catalyst, as well as includes a conversion unit (4) having a switching mechanism (18; 42) for switching a converter for passing the sample gas taken in from the intake port (2) through between the first converter (14) and the second converter (16), and a detector (6), hydraulically connected downstream of the conversion unit (4), for detecting a nitrogen oxide concentration in the sample gas having passed through the converter (14; 16) of the conversion unit (4).SELECTED DRAWING: Figure 1
Inventors:
TANABE AKIRA
WANG WEIZHAO
WANG WEIZHAO
Application Number:
JP2019009193A
Publication Date:
August 06, 2020
Filing Date:
January 23, 2019
Export Citation:
Assignee:
SHIMADZU CORP
International Classes:
G01N1/00
Attorney, Agent or Firm:
Daisuke Noguchi