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Real-Time Smoke
Particulate Sampling
Fire Storm 2000

Optical and Tapered Element Oscillating Microbalance

The proximity (about ½ mile) of the optical, real-time instruments and the MT DEQ TEOM instrument in Missoula allows the center to compare the results of the instruments. The corrected 1-h average value of the DataRam and the TEOM are plotted in time series in figure 29. The same values are shown in an X-Y scatter plot in figure 30. Regression statistics show the best-fit linear line has a slope of 1.06 and a y-intercept of +8.35. The correlation coefficient was 0.78. Figure 31 and Figure 32 show the results of the 8- and 24-h averages for the same instruments.

Image of a graph showing the corrected average value of the DataRam and the TEOM.
Figure 29—Results of the corrected values from the MIE DataRam
(serial No. 2484) in Missoula and the Montana Department of
Environmental Quality’s tapered element oscillating microbalance
instrument at Boyd Park (Missoula). Shown are the 1-h average
readings from both instruments.

Image of a graph showing figure 29 in a scatter plot.
Figure 30—Regression results of the 1-h average readings from
the Montana Department of Environmental Quality’s tapered
element oscillating microbalance instrument and the corrected
values from the MIE DataRam (serial No. 2484).

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