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Detector tubes, direct-reading passive badges, and dosimeter tubes.
Palassis J; Bryant J; Zey J
Air sampling instruments for evaluation of atmospheric contaminants, 9th edition. Cohen BS, McCammon CS Jr., eds. Cincinnati, OH: American Conference of Governmental Industrial Hygienists (ACGIH), 2001 May; :457-506
Use of direct-reading detector tubes and badges for analysis of toxic gas and vapor concentrations in air is a very rapid, convenient, and inexpensive technique that can be performed by semiskilled operators. These tubes and badges are in various stages of development, and highly variable results have been obtained. Accuracy depends on a high degree of skill in the manufacture of the tubes. At present, results may be regarded as only range-finding and approximate in nature. The best accuracy that can be expected from indicator tube systems of the best types is on the order of +/-25%. Recent advances with electronic concentration readers have improved precision and accuracy. Because many of the tubes are far from specific, an accurate knowledge of the possible interfering gases present is very important. The quantitative effect of these interferences depends on the volume sampled in an irregular way. To avoid dangerously misleading results, the operation and interpretation should be under the supervision of a skilled occupational hygienist. The manufacturers' descriptions for individual instruments are given in the pages which follow this discussion. It was not possible to check the accuracy of every detail of the description and claims made, and the responsibility for this material rests entirely with the individual manufacturers.
Detectors; Toxic fumes; Toxic gases; Toxic vapors; Monitors; Monitoring systems; Exposure levels; Exposure assessment
Cohen BS; McCammon CS Jr.
Air sampling instruments for evaluation of atmospheric contaminants, 9th edition
Page last reviewed: July 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division