In-Situ Stack Gas Analyzer For Sox Nox (ISGA-3000) online monitoring gas analyzer is an one-side installation gas analyzer which is developed after years reaching and design on online gas analysis instruments. It can monitor gas parameters, including concentration of SO2, NOx, O2, dust, humidity, temperature, pressure, flow and etc. In-Situ Stack Gas Analyzer For Sox Nox widely applied to tail gas emission monitoring and process analysis in many fields, including coal-fired power plant, waster-to-energy plant, cement factory, glass factory, lime factory, ceramics factory, sinter, coke oven, DeSOx process and DeNOx process.
GA-5000 online monitoring gas analyzer adopts 150°C high temperature heat tracing for whole process, on-site filtering and sampling, on-site analysis and measuring technology. All paths contacting with gas are made of 316L stainless steel. In-Situ Stack Gas Analyzer For Sox Nox analyzer has many transcendent features, such as low detection limit, accurate measuring result, easy to calibrate and compare, with simple construction and without any moving parts.
In-Situ Stack Gas Analyzer For Sox Nox adopts UV differential optical absorption spectroscopy (DOAS) which can precisely measure concentrations of trace gases using absorption spectrum by gas component. The basic principle is to identify gas molecule with the narrow-band of detected molecule, and inverse the concentrations of molecules from the absorption intensity of narrow-band. The absorption cross-section is regarded as the superposition of two parts: one part slowly changes with wavelength and form the broad-band of optical spectrum; the other part rapidly changes with wavelength and form the narrow-band of optical spectrum. Formula is as follows:
σi(λ) = σi0(λ) + σir(λ)
σi(λ) represents molecules absorption cross-section; σi0(λ) represents the part which slowly changes with wavelength; σir(λ) represents the part which rapidly changes with wavelength. The theory of DOAS is to eliminate slowly changing part and only keep fast changing part in the absorption spectrum, and inverse the concentrations of trace gases from the fast changing part. It can avoid fluctuation and drift of measured value for temperature drift or damping of light source, interference by dust or other gas and other factors.