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An Evaluation of Personal Sampling Pumps In Sub-Zero Temperatures.
Parker-CD; Lee-MB; Sharpe-JC
Research Triangle Institute, Research Triangle Park, N.C., 1977 Sep:122 pages
Personal sampling pumps were evaluated at temperatures between 25 degrees C to minus 50 degrees C. Pumps were evaluated for stability of the flow rate; pressure drop versus flow rate capabilities; reliability of calibration; ability to continuously sample cold air; ease of recalibration; battery performance; and environmental effects on metals, rubbers, plastics, motors, lubricants, and electronic components. All of the personal sampling pumps were sensitive to the temperature changes. All were useful at 0 degrees C, and none at minus 50 degrees C. Nickel-cadmium batteries were the most suitable sources of power up to minus 40 degrees C. They were not useful at minus 50 degrees C. The authors conclude that the personal sampling pumps evaluated are not designed for use in subzero environments, and significant changes are needed in the standard models to optimize them for low temperature use.
NIOSH-Contract; Contract-210-76-0124; Air-sampling-equipment; Analytical-instruments; Climatic-factors; Cold-environments;
NTIS Accession No.
Research Triangle Institute, Research Triangle Park, N.C., 122 pages, 34 references