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Evaluation of Optical Instruments for Real-Time Continuous Monitoring of Smoke Particulates

Evaluation Results and Discussion (continued)

Real-Time Continuous Monitoring Results (continued)

Radiance Research Nephelometer (continued)

2000 Laboratory Tests—The 2000 laboratory test results (figures 30 and 31) show that both Radiance Research nephelometers overestimated mass concentrations when compared to the average results of the two FRM's. Radiance No. 1 overestimated concentrations by 12 percent (slope = 1.12, R² = 0.90, N = 13) while Radiance No. 2 overestimated the concentrations by 14 percent (slope = 1.14, R² = 0.90, N = 14). The Radiance nephelometers estimated total suspended particulate while the other instruments estimated PM2.5 and smaller.

Figure 30—The 2000 laboratory results of the two Radiance
Research nephelometers compared to the average result from the
Federal Reference Method gravimetric samplers used in the tests.

Figure 31—Comparison of the results from the two Radiance
Research nephelometers in the 2000 laboratory tests.

Radiance Research Nephelometer continued

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