{"id":12124,"date":"2017-03-01T18:55:47","date_gmt":"2017-03-01T17:55:47","guid":{"rendered":"https:\/\/blog.gsa-messgeraete.de\/measuring-dusts-what-does-occupational-limit-value-mean\/"},"modified":"2025-05-07T10:59:51","modified_gmt":"2025-05-07T08:59:51","slug":"measuring-dusts-what-does-occupational-limit-value-mean","status":"publish","type":"post","link":"https:\/\/blog.gsa-messgeraete.de\/en\/measuring-dusts-what-does-occupational-limit-value-mean\/","title":{"rendered":"Measuring dusts &#8211; what does occupational limit value mean?"},"content":{"rendered":"\n<p>To<strong> measure<\/strong> <strong>dusts<\/strong>, the <strong>GSA Messger\u00e4tebau GmbH<\/strong> offers you a selection of professional indoor air measuring devices for accurate testing at<strong> the workplace<\/strong>.<\/p>\n\n\n\n<p>Our various <strong>sampling systems<\/strong> for <strong>particle measurements of dust fractions<\/strong> such as <strong>A-dust<\/strong> and <strong>E-dust<\/strong> of the <a href=\"https:\/\/www.gsa-messgeraete.de\/about-us\">GSA Messger\u00e4tebau<\/a> can help you with this.<\/p>\n\n\n\n<!--more-->\n\n\n\n<p><br>We can provide you with the best possible support, particularly in the field of<strong> particle measurements of dust fractions <\/strong>such as <strong>A-dust<\/strong> and <strong>E-dust<\/strong>, as our devices have a wide range of possible applications. We can even offer you various measuring devices such as the measuring device <a href=\"https:\/\/www.gsa-messgeraete.de\/SG5100ex-sampler-incl-charger\">SG5100ex <\/a>for potentially explosive atmospheres. Please <a href=\"https:\/\/www.gsa-messgeraete.de\/contact\">contact<\/a> us at any time for individual advice.  <\/p>\n\n\n\n<p>In order to determine whether certain potential hazards exist, it is important to deal with the topic of <strong>occupational limit values (OELs<\/strong>).<\/p>\n\n\n\n<p>The <strong>occupational limit value (OEL<\/strong>) describes the highest possible concentration of a substance that is permitted at the workplace. This is based on regular contact over eight hours a day, five days a week. The concentration may only be so high that no effects on health can be detected within a 40-hour week.<br>As part of the revision of the Hazardous Substances Ordinances on 01.01.2005, the term &#8220;<strong>occupational limit value<\/strong>&#8221; (<strong>OEL<\/strong>) replaced the old term &#8220;<strong>maximum workplace concentration<\/strong>&#8221; (MAC).  <\/p>\n\n\n\n<p><br><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Definition of occupational limit value (OEL)<br><\/strong><\/h3>\n\n\n\n<p><strong>TRGS 900<\/strong> is used for the consideration of the occupational limit value. In addition to the general terminology, the comparative parameters are also defined there. The following formula is used to determine the concentration of the substance:  <\/p>\n\n\n\n<figure class=\"wp-block-image alignnone wp-image-1586 size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"482\" height=\"169\" src=\"https:\/\/blog.gsa-messgeraete.de\/wp-content\/uploads\/2017\/03\/Formel.jpg\" alt=\"\" class=\"wp-image-1586\" srcset=\"https:\/\/blog.gsa-messgeraete.de\/wp-content\/uploads\/2017\/03\/Formel.jpg 482w, https:\/\/blog.gsa-messgeraete.de\/wp-content\/uploads\/2017\/03\/Formel-300x105.jpg 300w\" sizes=\"auto, (max-width: 482px) 100vw, 482px\" \/><figcaption class=\"wp-element-caption\">Formula for calculating the substance volume<\/figcaption><\/figure>\n\n\n\n<p>The following parameters apply to the molar volume:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ambient temperature of 20\u00b0Celsius<\/li>\n\n\n\n<li>Pressure of 101.3 kPa<\/li>\n\n\n\n<li>Volume of 24.1 L<\/li>\n<\/ul>\n\n\n\n<p>The determined sample concentration is reproduced under real conditions, i.e. the ambient parameters during sampling are included in the calculation. The different potencies must be taken into account in the calculation and adjusted accordingly. <br><br><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>The dust limit value &#8211; important for measuring dusts at the workplace<br><\/strong><\/h3>\n\n\n\n<p>Another specification of the OEL is the dust limit value, which applies to all insoluble dusts. A distinction is made between A-dust and E-dust. For A-dust, a limit value of 1.25 mg\/m<sup>3<\/sup> applies, based on an average density of 2.5 g\/cm\u00b3. This value corresponds to the current regulations, whereby a gradual reduction is possible by 2018. The aim is to permanently reduce exposure at the workplace. You can find more details on this in<strong> TRGS 900<\/strong>.     <\/p>\n\n\n\n<p>A dust limit value of 10 mg\/m\u00b3 applies to <strong>E-dust<\/strong>.<br>If the exposure at the workplace is subject to strong fluctuations, a dose-based monitoring concept can be implemented for one month. The average is determined from the shift averages, whereby this may not exceed the value of 3 mg\/m\u00b3 for A-dust. <\/p>\n\n\n\n<p>However, permanent strain should always be avoided.<\/p>\n\n\n\n<p>Below is a brief overview of some substances to which the occupational limit value applies (list is not exhaustive):<\/p>\n\n\n\n<p>The <strong>occupational limit value<\/strong> must not be applied to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\n<ul class=\"wp-block-list\">\n<li>ultrafine dusts<\/li>\n\n\n\n<li>Dusts with specific toxicity (e.g. mutagenic, carcinogenic, fibrogenic or sensitizing effects)<\/li>\n\n\n\n<li>soluble substances<\/li>\n\n\n\n<li>Lacquer aerosols<\/li>\n\n\n\n<li>Coarsely dispersed particle fractions<\/li>\n\n\n\n<li>Dusts with manufactured nanomaterials<\/li>\n\n\n\n<li>underground workplaces.  <\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p><br><\/p>\n\n\n\n<p>Sources:<\/p>\n\n\n\n<p>[1] http:\/\/www.bfga.de\/arbeitsschutz-lexikon-von-a-bis-z\/fachbegriffe-j-r\/mak-wert-fachbegriff\/<br>[2] http:\/\/www.chemie.de\/lexikon\/Maximale_Arbeitsplatz-Konzentration.html<br>[3] \/GeltendeFassung.wxe?Abfrage=Bundesnormen&amp;Gesetzesnummer=20001418&amp;ShowPrintPreview=True<br>[4] https:\/\/de.wikipedia.org\/wiki\/Maximale_Arbeitsplatz-Konzentration<br>[5] http:\/\/www.dguv.de\/staub-info\/rechtsgrundlagen\/grenzwerte\/asgw\/index.jsp<br>[6] https:\/\/www.bgrci.de\/fileadmin\/BGRCI\/Banner_und_Artikelbilder\/Veranstaltungen\/Der_neue_Allgemeine_Staubgrenzwert_-_Vortrag_von_Karlheinz_Guldner.pdf<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To measure dusts, the GSA Messger\u00e4tebau GmbH offers you a selection of professional indoor air measuring devices for accurate testing at the workplace. Our various sampling systems for particle measurements of dust fractions such as A-dust and E-dust of the GSA Messger\u00e4tebau can help you with this.<\/p>\n","protected":false},"author":2,"featured_media":12130,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[1075,1089,1059],"tags":[1560,1558,1577,2003,1260,2002,2001,2004,1569,1309,1906],"class_list":["post-12124","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dust","category-measuring-devices","category-uncategorized","tag-agw-en","tag-dust-exposure-at-the-workplace","tag-dust-limit-value","tag-gsa-measuring-devices-gmbh","tag-hazardous-substances-ordinance","tag-mak-en","tag-maximum-workplace-concentration","tag-measure-dust-exposure","tag-occupational-limit-value","tag-occupational-safety","tag-particle-measurements-dust-fraction-e-dust-and-a-dust"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Measuring dusts - what does occupational limit value mean? - blog.gsa-messgeraete.de<\/title>\n<meta name=\"description\" content=\"Measure dusts with the measuring device SG5100ex to determine possible exceedances such as the occupational limit value.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.gsa-messgeraete.de\/en\/measuring-dusts-what-does-occupational-limit-value-mean\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Measuring dusts - what does occupational limit value mean? - blog.gsa-messgeraete.de\" \/>\n<meta property=\"og:description\" content=\"Measure dusts with the measuring device SG5100ex to determine possible exceedances such as the occupational limit value.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.gsa-messgeraete.de\/en\/measuring-dusts-what-does-occupational-limit-value-mean\/\" \/>\n<meta property=\"og:site_name\" content=\"blog.gsa-messgeraete.de\" \/>\n<meta property=\"article:published_time\" content=\"2017-03-01T17:55:47+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-05-07T08:59:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.gsa-messgeraete.de\/wp-content\/uploads\/2017\/03\/SG-5100-Measure-dust-pollution.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"s.abels\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"s.abels\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/blog.gsa-messgeraete.de\/en\/measuring-dusts-what-does-occupational-limit-value-mean\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/blog.gsa-messgeraete.de\/en\/measuring-dusts-what-does-occupational-limit-value-mean\/\"},\"author\":{\"name\":\"s.abels\",\"@id\":\"https:\/\/blog.gsa-messgeraete.de\/en\/#\/schema\/person\/c4e44d90595cffae6fdad967be126025\"},\"headline\":\"Measuring dusts &#8211; 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