Description
EM-5 flue gas analyzer is a self-developed gas analysis product of multiple return light path. The gas analyzer is based on DOAS and chemometric algorithms (PLS), able to measure SO2, NO, NO2, O2, NH3, CO, CO2, Cl2, O3, H2S, HCl, CH3I, etc. With high accuracy and reliability, low operating costs, fast response time, wide measurement range and application fields, it has achieved even surpassed similar products home and abroad.
Technical Principle
EM-5 flue gas analyzer (ultra-low emission monitoring) uses the long optical path UV DOAS technology. Its optical technology platform consists of light source, white cell gas chamber, optical and spectroscopic (including diaphragm, holographic grating, linear array detector) and other optical components. As shown in figure.
Ultraviolet light is sent by the photosource through the optical window into the white cell gas chamber (optical path 5-15 meters, adjustable) , and absorbed by the sample gas flow through the white pool gas chamber. The light carrying sample absorption information gathers through lens coupled into the fiber and then transmits through the optical fiber into the spectrometer. After light splitting and photovoltaic conversion, absorption spectrum is obtained and analyzed to calculate the concentration of the related components in gas.
Product Feature
High measurement accuracy
- The minimum detection limit of SO2 , NO2, NO can be 1mg/m3 (15m optical path)
- Ultraviolet has no moisture absorption, undisturbed by moisture and dust.
- No cross interference between the gas being measured (see table 1)
- NO and NO2 can be measured at the same time, dispense with converter
High reliability
- White cell + DOAS + PLS technology, small amount of zero drift and span drift
- Modular design
- No optical moving parts and no vibration influence
- Strong gas cell, low cost
- Spectrum automatic adjustment technology, long free maintenance cycle
- Light source adopts the pulse source, the service life is 10 years
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