EM-5 Flue Gas Analyzer

Overview EM-5 series flue gas analyzer is a series of self-developed gas analysis products for online gas analysis of domestic as well as foreign environmental protection and industrial control. Based on UV Differential Optical Absorption Spectroscopy (DOAS) technology and chemometrics algorithm (PLS), it is able to measure the gas concentration of SO2, NO, NO2, O2, NH3, Cl2, O3, H2S, Ch3 and etc. With features of high measurement accuracy, high reliability, fast response time, wide application scope, it can be widely applied in occasions of environment online monitoring, industrial process control, safety monitoring and etc. Depended on years of flue gas analyzer research experience and combined with practical experience of thousands of successful application cases, the analyzer has derived multiple types (standard type, low emission type, ultra-low emission type, and customized type) to meet different index requirements in different working condition.   UV DOAS technology. The optical technology platform consists of a light source, gas chamber, optical fiber and spectrograph (including the diaphragm, a holographic grating, linear array detector) and other optical components.   Ultraviolet light emitted by light source enters the gas chamber by an optical window and absorbed by measured sample gas flowed through the gas chamber. The light carrying sample absorption information will be gathered by the lens and coupled into an optical fiber and then transmits into spectrometer through fiber. After light splitting and photo-voltaic conversion, the gas absorption spectrum is obtained.   The corresponding component concentration in the gas can be calculated by analyzing the spectrum. Note: the difference among standard analyzer, low emission analyzer, and ultra-low analyzer is the different optical path length of gas chamber: for standard analyzer, it adopts dual lens collimation system with 0.25m optical path; for low emission analyzer, it adopts multiple return structure with 1m optical path; for ultra-low emission analyzer, it uses white cell structure.     Features Of EM-5 online gas analyzer     High measurement accuracy Minimum detection limit of SO2, NO, NO2 can reach 1mg/m3  (15m optical path) Ultraviolet has no moisture absorption, undisturbed by moisture and dust No cross interference between measured gases ( refer to table 1) Measure NO and NO2 simultaneously without converter Low detection limit   Measuring gas Interference SO2 NO NO2 O2 SO2 (500ppm) / <1ppm no no NO (500ppm) no / no no NO2 (500ppm) no <1ppm / no H2O (no dew) no no no no CO (1000ppm) no no no no CO2 (20%) no no no no O2 (21%) no no no /   High reliability Small zero drift and span drift Modular design No optical moving parts, without vibration influence Strong gas chamber, low cost Automatic adjustment spectrum technology, long maintenance-free period Adopt pulse light source with 10-year service life   Technical Parameter Of EM-5 Flue Gas Analyzer   Measurement Principle UV-DOAS＋PLS Versions Regular range Low range Ultra-low range Ranges My range Max range My range Max range My range Max range Component SO2 0-300ppm 0-3000ppm 0-100ppm 0-300ppm 0-50ppm 0-100ppm NO 0-300ppm 0-3000ppm 0-100ppm 0-300ppm 0-50ppm 0-100ppm NO2 0-500ppm 0-4000pp 0-300ppm 0-1000ppm 0-100ppm 0-200ppm O2 (ECD or ZrO2) 0-5% 0-25% 0-5% 0-25% 0-5% 0-25% Linearity ≤±3%F.S. Repeatability ≤2% Zero Drift ≤ ± 2% FS / 7d Span Drift ≤ ± 2% FS / 7d Response Time(T90) ≤50s Working Temperature -20 ℃ ～ ＋ 50 ℃ Preheating Time No preheating 20min 40min Sample Gas Interface Φ6 Bi-Lok Sample Gas Flow Range: (0.5 ～ 2) L / min, fluctuation ＜ 25% Sample Gas Pressure Current ambient pressure ±0.1Bar Sample Gas Temp. 0 ℃ ～ ＋ 50 ℃ Sample Gas Humidity No condensation (under sample gas temperature) 4-20mA Input 3 , configurable, 100Ω load 4-20mA Output 5, output content can be configured, maximum load capacity ≤800Ω Switching value Input 6 , configurable Relay Output 14, output content can be configured. DC30V2A Digital I / O 1×Rs232, 1×Rs485 (Support Modbus protocol) Installation Method 19’ panel Supply Voltage 220VAC ± 10% Rated Power About 100W About 120W   Application Of EM-5 Flue Gas Analyzer Coal-fired power plantCement plantIndustrial furnaceDeSOX process monitoringDeNOX process monitoringWaste incineration plantPVC process in chlor-alkali plantTitanium dioxide production processSulfur recovery processNatural gas purification processMethyl iodide analysis for the coal chemical industry On-line air monitoring   Hangzhou Zetian Technology is committed to the integrity, strength and quality of our air quality monitor. We're internationally recognized. We have 5 gas analyzer for sale! To learn more about the flue gas analyser working principle, please contact us!