Synthesis of corrected multi-wavelength spectrometers for atmospheric trace gases

Abstract

The method for synthesis of corrected three-wavelengths spectrometers for trace gas components of atmosphere on the basis of development of mathematical model has been suggested. The classification table for possible structures of corrected spectrometers is considered. The synthesis allows to reveal some new variants for development of three-wavelength spectrometers for trace gas components of atmosphere. For experimental checkup of achieved theoretical results, a laboratory pattern of three-wavelength spectrometer is developed and tested.

Water Vapor Interference Correction in a Non Dispersive Infrared Multi-Gas Analyzer

“…In such a situation, the analysis system becomes more complex and produces a remarkable measurement error since the interfering water vapor can hardly be dried thoroughly. [8] In this Letter, we report an effective correction method for water vapor interference in the NDIR multi-gas analyzers, and investigate the feasibility of high-accuracy multi-gas measurement of the pollutant emission. Figure 2 shows the structure of a self-made NDIR multi-gas analyzer, including an infrared (IR) light source, an optical filter wheel, a sample cell, a detector and a data processor.…”