Ultra-Violet Differential Optical Adsorption Spectrometer (UV-DOAS)


The Ultra Violet-DOAS spectrometer is a fixed continuous emissions monitor. The system provides real-time multi-gas measurement (qualification and quantification) of gases. The optical spectrum analyzers transmit electromagnetic energy on the near-visible range. The energy travels through the gas field, to one or more reflectors, and then the returning spectra is evaluated to determine what gasses were encountered along the way. The UV-DOAS provide ultra violet analysis of a sample volume inside of the instrument. Ultra violet and infrared optical gas analysis along a closed path (small chamber where light passes through the sample many times, reflected back-and-forth via mirrors), where a sample is drawn inside the instrument in an application like an exhaust stack. The difference between the transmitted and received energy spectra are evaluated. The data will be available via wireless communications to TFMCS and SAFER Systems. The technical details of the instrument are available here:


In the pilot scale demonstration, the UV-DOAS was placed in A-Tank Farm.