1. Maintenance free NDIR (non-dispersive infrared) CO2 sensor ?

2. Based on analyzing the research progress of automobile gas detecting and gas detecting methods, choose non-dispersive infrared (NDIR) techniques as the detecting scheme.

3. A new type of Non?dispersed Infrared(NDIR)gas sensors based on pulsable IR source is introduced.

4. The multi channel light base on NDIR was applied to analyze varied part of gas in single gaseous chamber.

5. WE think we should take NDIR to analysis the gas because it will be small-size, high-capability with lower cost.

6. A non-dispersive infrared (NDIR) spectrum analysis was used to design a carbon dioxide sensor which is non-modulating and double-wavelength.

6. try its best to collect and create good sentences.

7. A novel method-non-dispersion infrared (NDIR) based on gas filter correlation(GFC) technology for measuring CO trace gas and its application in the field measurement were described.

8. A Non-dispersed infrared (NDIR) methane gas sensors system based on infrared absorption spectrum theory was designed according to single light beam and double wavelengths technology.

9. Choose the NDIR air analysis apparatus and Pitot tube using in the CEMS (continuous emission monitoring system) which are more suitable for plants'environment and more precise.

10. To meet the need of automotive exhaust gas pollution measure, this paper analyzes the detecting principle of NDIR gas analyzer and designs its sensor system based on Pymelectric Infrared Sensors.

11. Based on the proposed method, the interference due to water vapor and carbon dioxide in the NDIR NO analyzer is corrected.

12. Methods After hydrogen peroxide products were catalyzed by platinum, total organic carbon in it was detected by NDIR .