Installation for the automated measurement of total nitrogen dioxide in the atmosphere on the basis of a monochromator MDR-23


The unit is designed for determination of total nitrogen dioxide content in the atmosphere and is based on an automated spectrophotometer that measures the spectral intensity of the scattered solar radiation from the zenith during twilight in the spectral range of 435-450 nm.

  • The measurements are performed at solar zenith angles 84°-96° in almost any weather.
  • Absence of a servosystem simplifies the construction and increases its reliability.
  • The choice of wavelengths that are used to determine the inclined content of NO2 is determined by the spectral characteristics of NO2 and ozone absorption cross-sections, and the position of the Fraunhofer lines.
  • Process measurement and data archiving is controlled by an external computer.
  • To obtain the results in the form of atmospheric parameters the inverse problem for the propagation of radiation is solved
Technical characteristics of the facility
Working spectral range, nm 430 ÷ 460
Scan step, nm 0,05
Repeatability wavelength, nm 0,05
Spectral resolution, nm 1,5
Angle of view, ° 9
Spectrum recording time, sec 90
Interface RS232C
Operating temperature, o C 20 - +40
Power consumption 500 W


• Ecology
• Environmental protection


Sale of equipment