Beijing Zetron Technology Co., Ltd CN

DOAS-2000 differential ultraviolet spectrometer

DOAS-2000 online differential ultraviolet spectrometer is mainly used in the gas analysis industry. The main detection occasions: flue gas emission, desulfurization and denitrification, boiler exhaust, VOCs exhaust, sewage pipeline gas detection and analysis, etc. System composition: sampling unit, sample gas pretreatment unit, gas analysis unit.


On-line hydrogen sulfide DOAS-2000 features:
★ Explosion-proof and waterproof design, protection grade IP66, outdoor type, fast detection, reliable and stable;
★ Built-in high-efficiency two-stage condensation dehumidification and dust removal pretreatment system, automatic control integrated design, effectively reduce SO2 loss, prevent water vapor interference, and is more suitable for working conditions with high humidity and low flue gas component concentration;
★ Using differential absorption spectroscopy technology (DOAS), the temperature drift is small, the measurement accuracy is high, and the ultra-low concentration can be measured;
★ Long-life pulsed xenon lamp cold light source, short warm-up time and long service life;
★ Built-in long optical path gas cell, dual range design for NOx and SO2 analysis, automatically switch range control according to the concentration value;
★ The concentration curve of each flue gas component is displayed in real time, and the curve display ratio can be adjusted;
★ Low detection limit, not affected by moisture and dust, strong anti-interference ability, can avoid cross-interference between gases;
★ Built-in heating device, automatically start the heating function at low temperature, so that the analyzer can be used in severe cold areas;
★ Design and develop computer database and communication system software under windows environment to realize computer communication for storage and printing;
★ The fault self-checking function can generate fault reports after detection, which is convenient for users to maintain;
★ Integrated integrated micro thermal printer or external Bluetooth wireless printer;
★ The flue gas conversion method is based on the reference oxygen content conversion method and the conversion factor conversion method;
★ Large-capacity data storage, 16G, can create folders on a daily basis, and store daily test data separately;
★ Optional automatic blowback system;
★ The standard sampling distance is 30-40 meters, and the maximum sampling distance of the optional vacuum pump is more than 70 meters;
★ The flue gas temperature that can be detected and analyzed is the flue gas within 1300 ℃, and the detection and analysis of higher temperature flue gas needs to be customized.


On-line hydrogen sulfide DOAS-2000 detection parameters:

Detection parameters: NO, NO2, SO2, NH3, H2S, O3, benzene, toluene, xylene, etc., automatically identify and analyze the concentration, and can also be equipped with a pitot tube to detect the wind speed, temperature, pressure, and flow rate of the flue. You can also choose Equipped with meteorological parameters such as wind speed, wind direction, rainfall, and atmospheric pressure;
Measuring range: 0-2, 10, 20, 50, 100, 500, 1000, 2000ppm, other ranges can be customized;
Detection principle: Ultraviolet Differential Absorption Spectroscopy (DOAS);
Sampling temperature:-40°C ~600°C (standard), optional:-40°C ~800°C,-
40℃ ~1300℃, higher temperature detection and analysis need to be customized;
Sampling humidity: 0~99%RH;
Host working environment:-40℃ ~70℃, ≤ 95%RH;
Working mode: online continuous work, pump suction sampling;
Sampling distance: standard 30-40 meters, the sampling distance of the optional vacuum pump is greater than 70 meters;
Sampling flow: adjustable, 4 liters/minute (standard), 10 liters/minute, optional;
Working voltage: 220VAC, 50HZ;
Output signal: 4~20mA, RS485, multiple passive contacts, optional: wireless transmission, network transmission;
Dimensions: 700mm high ×430mm wide ×400mm thick;
Protection level: IP66 outdoor waterproof type, explosion-proof type is optional;
Display mode: standard product has no window display, optional 9-inch touch color screen display;
Printing method: no printing function, optional wireless bluetooth printer for printing;
Alarm mode: optional integrated sound and light alarm, external type.


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