Planar Mie Scatter (PMS) is a commonly used method in flow visualization studies. It is most often used in experiments to qualitatively study the structural features of the flowfield (Chen and Driscoll, 1988; Clemens, et al., 1990; Goldstein and Smits, 1993). However, it can also be applied to the study of the mean concentration field and concentration fluctuations in turbulent flows. Studies by Rosenweig, Hottel, and Williams (1961) and Becker, Hottel, and Williams (1967) demonstrated the viability of making such measurements using PMS. Later studies, such as Yip, et al. (1987) show that this technique continues to yield useful results to the present.