In the past, emphasis was placed on the improvement of methane detection methods. But with increased public awareness of air pollution, and with the proposed introduction of diesel-powered traction equipment in underground coal mines, it has become imperative that the mine operator become knowledgeable of the instrumentation that is available and that is being developed to measure and continuously monitor the breathing-air quality at all working places in the mines. This report presents the results of Bureau of Mines research since 1969 on gas detection instrumentation, and ongoing research that will produce prototypes within the near future.
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