The transformation of an old Raman double monochromator into a dual spectrometer capable of working either as the original instrument or as a very high sensitivity scanning single monochromator with multichannel charge-coupled device (CCD) array detection is described. The merits and limitations of this instrument, particularly suited for medium/low resolution (0.3 to 2 cm<sup>-1</sup>) Raman spectroscopy in the gas phase, are discussed. Example spectra of O<sub>2</sub>, N<sub>2</sub>, CO<sub>2</sub>, H<sub>2</sub>O, and CCl<sub>4</sub> are shown.
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