Optical gas sensor

Optical gas sensing technology is a late start, but one of the fastest growing technologies. The type commonly used in industry has an infrared gas analyzer, ultraviolet analyzer, photoelectric colorimeter type analyzer, chemiluminescence analyzer, light scattering analyzerInfrared type working principle is to use infrared absorption spectrum of Engine Temperature Sensors  measured gas characteristics or thermal effect to achieve the gas concentration measurement, common spectral range 1 ~ 25μm, the commonly used types of dispersive infrared type DIR and NDIR non-dispersive infrared type. Shimadzu produced SOA-307/307Dx sulfur dioxide continuous analyzers, the measurement method is to use a single light source dual-beam non-dispersive infrared absorption method, namely, by the measured gas broadband infrared radiation with a wavelength selective detector and to select a specific frequency band, in order to this specific wavelength to measure SO2 absorption of infrared radiation, the measurement range of the minimum 0 ~ 100ppm, up to 0 ~ 1vol%.