temperature combustion rates of burning carbonaceous particles. The features and
performance of this instrument are contrasted to those of a two-color ratio pyrometer,
constructed earlier for similar studies. The three-color pyrometer employs a visible (0.65 pm)
and two near-infrared (0.80 and 0.975 pm) wavelengths. The instrument uses a single
optical fiber to capture radiation emitted from a particle burning in a high-temperature …