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System to prevent clogging of gas sampling tubes.
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract H0308042, 1981 Dec; :1-91
The Bureau of Mines utilizes special testing methods for the analysis of underground mine atmospheres for use during or after mine disasters and fires. These methods depend upon drawing sample gas to the surface through multiple tube bundles with the subsequent analysis of grab samples or the automatic analysis by often remotely located instruments on a continuous, 24-hour basis. This report covers research and resulting development conducted by the Bureau of Mines to produce a reliable method to selectively remove condensable vapors and particulate in the sample gas stream under worst-case field conditions. The effort resulted in two prototype systems that have greater field utility than originally anticipated. The innovative project resulted in two patent applications submitted through the Bureau of Mines.
Samplers; Gas detectors; Underground mining; Tubes; Safety; Design criteria; Performance evaluation; Revisions; Fires; Dyers; Gas sample conditioning; Dewpoint reduction
CP; Final Contract Report
NTIS Accession No.
OFR 48-83; Contract-H0308042
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, Contract H0308042
Charlton Technology Inc.
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division