Portable gas monitors : some problems of zero drift, response time and selectivity solved with "gas-modifier pumps"

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<title>Portable gas monitors</title>
<subTitle>: some problems of zero drift, response time and selectivity solved with "gas-modifier pumps"</subTitle>
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<title>The Annals of occupational hygiene</title>
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<name type="personal" usage="primary" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="MAPA20080020347">
<namePart>Bergman, I.</namePart>
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<abstract displayLabel="Summary">The detection and monitoring of toxic gases in industrial atmospheres with the aid of direct-reading instruments presents a number of problems, these may include: zero drift; slow response; lack of selectivity; and insensitivity to some gases. These problems can be ameliorated or overcome by sequentially exposing the sensor to a series of samples, some or all of which have been pumped though gas midifier layers to remove or modify relevant constituents of the gas stream. The requirements of such a system and suitable designs of pumps for application to fixed of portable monitors or alarms are discussed</abstract>
<note type="statement of responsibility">I. Bergman</note>
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<topic>Gases tóxicos</topic>
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<text>nº 4, 1986 ; p. 469-479</text>
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