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	<title>Accessories | ISI ❍ Health and Safety</title>
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		<title>Sampling heads</title>
		<link>https://hse.isi-be.eu/air-quality/air-sampling-pumps/sampling-heads/</link>
		
		<dc:creator><![CDATA[Benoit Neyens]]></dc:creator>
		<pubDate>Thu, 26 Mar 2020 09:20:33 +0000</pubDate>
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					<description><![CDATA[In general terms we draw a known volume of air using a sampling pump through a suitable sampling medium. For particulates and fumes it would generally be a ﬁlter paper. A typical sampling train for personal monitoring would look like this with the sampler mounted in the breathing zone.

A personal sampling pump would be connected to a sampling head containing a suitable ﬁlter via a length of tubing. The pump is normally worn on the belt but it can be mounted on the back or the chest in a suitable harness. The sampling head, however, must be in the breathing zone for a valid sample. Dust is particles of solid material around 1µm to 1mm diameter. Larger particles are too heavy to remain airborne. Fumes are smaller than dust. They are solid particles formed by condensation from a gas and the particle size is typically &#60;1µm. Dust can further be categorized into size fractions: Total Inhalable Dust, Respirable Dust and Thoracic dust. Here is a graph of the sampling convention.

<img class="alignnone wp-image-228040" src="https://hse.isi-be.eu/wp-content/uploads/2020/03/dusts-diagram-300x195.jpg" alt="" width="355" height="231" />

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