{"id":847,"date":"2020-04-14T16:56:17","date_gmt":"2020-04-14T14:56:17","guid":{"rendered":"https:\/\/blog.pamas.de\/?p=847"},"modified":"2025-06-30T13:19:05","modified_gmt":"2025-06-30T11:19:05","slug":"cleanliness-classes-for-oils-fuels","status":"publish","type":"post","link":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/","title":{"rendered":"Cleanliness classes for oils & fuels"},"content":{"rendered":"\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

To display particle counts in oil and fuel samples and, depending on the industry, also in water-based hydraulic fluids, in a simplified and uniform way, they are often reported in cleanliness classes according to the chosen reporting standard. In the following we\u2019d like to introduce you to the most common and important international standards.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

1. Current cleanliness classes<\/strong><\/p>

ISO 4406<\/strong>
History and scope: In 1999 ISO 4406:1999 replaced the previous standard ISO 4406:1987. The latest revision is called ISO 4406:2017. ISO 4406 is predominantly used in the hydraulic industry however companies within the filtration, fuel and automotive industries also adopt this standard.
Particle sizes: The cleanliness classes as per ISO 4406 are determined by the cumulative counts in the size bands >4\u00b5m(c), >6\u00b5m(c) and >14\u00b5m(c). To comply with the ISO-standardization process, the particle sizes have been redefined. Particle sizes are now displayed as \u00b5m(c). The additional (c) indicates that the particle counter has been calibrated according to ISO 11171. This enables the old and new measurements to be easily identified and differentiated. 1\u00b5m as per ISO 4402 equals approximately to 4\u00b5m(c) as per ISO 11171.
Calibration: The ISO 4406 reporting standard is based on the calibration standard ISO 11171. The calibration media used is called ISO MTD (ISO Medium Test Dust) and it was introduced after the end of production of ACFTD (Air Cleaner Fine Test Dust) which had been previously used to calibrate particle counters according to ISO 4402.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

SAE AS4059F<\/strong><\/p>

History and scope: SAE AS4059 was developped to succeed the NAS 1638 standard and to eliminate the existing disadvantages NAS 1638 has, most importantly, the traceability of the used calibration standard. NAS 1638 has no traceability. SAE AS4059 is mainly used by the military and companies from the aviation\/aerospace and the offshore oil & gas-industry.
Particle sizes: Depending on the application, 5 or 6 cleanliness classes are reported.
For 6 size channels, they are displayed in: > 4 \u00b5m(c), 6 \u00b5m(c), 14 \u00b5m(c), 21 \u00b5m(c), 38 \u00b5m(c) and 70 \u00b5m(c).
For 5 size channels, they are displayed in: >6 \u00b5m(c), 14 \u00b5m(c), 21 \u00b5m(c), 38 \u00b5m(c) und 70 \u00b5m(c).
This is the latest revision that has removed the Banding A-F (6 channels) and B-F (5 channels) from the reporting standard result. The result is reported to the largest classification code of the size channels with the letters cpc preceding it. The letters cpc stands for cumulative particle count. For example, a result would be displayed as – SAE AS4059F cpc 4
Calibration: As with the ISO 4406 standard, SAE AS4059 is based on the ISO 11171 calibration standard.<\/p>

\u00a0<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t


<\/p>\n

GOST 17216:2001<\/strong>
History and scope: The Russian military standard GOST 17216:2001 plays a central role in expressing the cleanliness of oils and fuel in all military and civil applications. This doesn\u2019t just apply for Russia but also for all CIS countries and some Asian countries which supply to the Russian market.
Particle sizes: Depending on the interpretation, cleanliness classes for various particle sizes between 0.5\u00b5m and 200\u00b5m are determined.
Calibration: GOST 17216:2001 is based on the calibration standard ISO 4402.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

2. Historical cleanliness classes<\/strong><\/p>

NAS 1638 <\/strong>
History and scope: NAS 1638 is the predecessor of SAE AS4059. Being the oldest cleanliness standard, it is known to most users. Originally developed in the 1960\u2019s as a guideline for the cleanliness of hydraulic fluids in the aviation industry, it quickly became adopted by other industries.
Particle sizes: The cleanliness classes according to NAS 1638 get determined by the differential counts in the size bands of:
5 to 15 \u00b5m, 15 to 25 \u00b5m, 25 to 50 \u00b5m, 50 to 100 \u00b5m and >100 \u00b5m.
Calibration: To express results as per NAS 1638, automatic particle counters were usually calibrated according to ISO 4402. Since there weren\u2019t any particle counters developed in 1964 when NAS 1638 was published, the first calibration standards have been retrospectively tailored to NAS 1638. The production of the ISO 4402 calibration material ACFTD stopped in 1999 and calibrations according to ISO 4402 are no longer effective since then. PAMAS, however, have a large stock of this ACFTD calibration material and are able to provide calibrations according to ISO 4402 upon request if the customer applications or legacy projects require this standard.<\/p>

\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

ISO 4406:1987\u00a0<\/strong><\/p>

History and scope: The predecessor of ISO 4406:1999 today only is relevant as a reference value or for historical reasons.
Particle Sizes: The cleanliness classes according to ISO 4406:1987 are determined by the cumulative counts in the size bands >5 \u00b5m und >15 \u00b5m (sometimes also >2, >5 and >15 \u00b5m).
Calibration: ISO 4406:1987 is based on the calibration standard ISO 4402.<\/p>

This chart gives an overview of the most common cleanliness classes and the calibration standards on which they are based:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Read more about our particle counters.<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

To display particle counts in oil and fuel samples and, depending on the industry, also in water-based hydraulic fluids, in a simplified and uniform way, they are often reported in cleanliness classes according to the chosen reporting standard. In the following we\u2019d like to introduce you to the most common and important international standards. 1. […]<\/p>\n","protected":false},"author":2,"featured_media":1599,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[31],"tags":[],"class_list":["post-847","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-standards"],"acf":[],"yoast_head":"\nCleanliness classes for oils & fuels - PAMAS<\/title>\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.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cleanliness classes for oils & fuels - PAMAS\" \/>\n<meta property=\"og:description\" content=\"To display particle counts in oil and fuel samples and, depending on the industry, also in water-based hydraulic fluids, in a simplified and uniform way, they are often reported in cleanliness classes according to the chosen reporting standard. In the following we\u2019d like to introduce you to the most common and important international standards. 1. […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/\" \/>\n<meta property=\"og:site_name\" content=\"PAMAS\" \/>\n<meta property=\"article:published_time\" content=\"2020-04-14T14:56:17+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-30T11:19:05+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.pamas.de\/wp-content\/uploads\/2021\/07\/ISO_MTD_freigestellt_mit_Schatten.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"899\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Harald Bechtle\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Harald Bechtle\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/\"},\"author\":{\"name\":\"Harald Bechtle\",\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/#\\\/schema\\\/person\\\/86e4e5dd30309ee2d351cdf8edeafc66\"},\"headline\":\"Cleanliness classes for oils & fuels\",\"datePublished\":\"2020-04-14T14:56:17+00:00\",\"dateModified\":\"2025-06-30T11:19:05+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/\"},\"wordCount\":756,\"commentCount\":2,\"publisher\":{\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/blog.pamas.de\\\/wp-content\\\/uploads\\\/2021\\\/07\\\/ISO_MTD_freigestellt_mit_Schatten.png\",\"articleSection\":[\"standards\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/\",\"url\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/\",\"name\":\"Cleanliness classes for oils & fuels - PAMAS\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/blog.pamas.de\\\/wp-content\\\/uploads\\\/2021\\\/07\\\/ISO_MTD_freigestellt_mit_Schatten.png\",\"datePublished\":\"2020-04-14T14:56:17+00:00\",\"dateModified\":\"2025-06-30T11:19:05+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/#primaryimage\",\"url\":\"https:\\\/\\\/blog.pamas.de\\\/wp-content\\\/uploads\\\/2021\\\/07\\\/ISO_MTD_freigestellt_mit_Schatten.png\",\"contentUrl\":\"https:\\\/\\\/blog.pamas.de\\\/wp-content\\\/uploads\\\/2021\\\/07\\\/ISO_MTD_freigestellt_mit_Schatten.png\",\"width\":1200,\"height\":899},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/cleanliness-classes-for-oils-fuels\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Cleanliness classes for oils & fuels\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/\",\"name\":\"PAMAS\",\"description\":\"Partikelmess- und Analysesysteme\",\"publisher\":{\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/#organization\",\"name\":\"PAMAS\",\"url\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/blog.pamas.de\\\/wp-content\\\/uploads\\\/2020\\\/02\\\/pamas_logo.png\",\"contentUrl\":\"https:\\\/\\\/blog.pamas.de\\\/wp-content\\\/uploads\\\/2020\\\/02\\\/pamas_logo.png\",\"width\":291,\"height\":120,\"caption\":\"PAMAS\"},\"image\":{\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/blog.pamas.de\\\/en\\\/#\\\/schema\\\/person\\\/86e4e5dd30309ee2d351cdf8edeafc66\",\"name\":\"Harald Bechtle\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Cleanliness classes for oils & fuels - PAMAS","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/","og_locale":"en_US","og_type":"article","og_title":"Cleanliness classes for oils & fuels - PAMAS","og_description":"To display particle counts in oil and fuel samples and, depending on the industry, also in water-based hydraulic fluids, in a simplified and uniform way, they are often reported in cleanliness classes according to the chosen reporting standard. In the following we\u2019d like to introduce you to the most common and important international standards. 1. […]","og_url":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/","og_site_name":"PAMAS","article_published_time":"2020-04-14T14:56:17+00:00","article_modified_time":"2025-06-30T11:19:05+00:00","og_image":[{"width":1200,"height":899,"url":"https:\/\/blog.pamas.de\/wp-content\/uploads\/2021\/07\/ISO_MTD_freigestellt_mit_Schatten.png","type":"image\/png"}],"author":"Harald Bechtle","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Harald Bechtle","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/#article","isPartOf":{"@id":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/"},"author":{"name":"Harald Bechtle","@id":"https:\/\/blog.pamas.de\/en\/#\/schema\/person\/86e4e5dd30309ee2d351cdf8edeafc66"},"headline":"Cleanliness classes for oils & fuels","datePublished":"2020-04-14T14:56:17+00:00","dateModified":"2025-06-30T11:19:05+00:00","mainEntityOfPage":{"@id":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/"},"wordCount":756,"commentCount":2,"publisher":{"@id":"https:\/\/blog.pamas.de\/en\/#organization"},"image":{"@id":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/#primaryimage"},"thumbnailUrl":"https:\/\/blog.pamas.de\/wp-content\/uploads\/2021\/07\/ISO_MTD_freigestellt_mit_Schatten.png","articleSection":["standards"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/","url":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/","name":"Cleanliness classes for oils & fuels - PAMAS","isPartOf":{"@id":"https:\/\/blog.pamas.de\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/#primaryimage"},"image":{"@id":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/#primaryimage"},"thumbnailUrl":"https:\/\/blog.pamas.de\/wp-content\/uploads\/2021\/07\/ISO_MTD_freigestellt_mit_Schatten.png","datePublished":"2020-04-14T14:56:17+00:00","dateModified":"2025-06-30T11:19:05+00:00","breadcrumb":{"@id":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/#primaryimage","url":"https:\/\/blog.pamas.de\/wp-content\/uploads\/2021\/07\/ISO_MTD_freigestellt_mit_Schatten.png","contentUrl":"https:\/\/blog.pamas.de\/wp-content\/uploads\/2021\/07\/ISO_MTD_freigestellt_mit_Schatten.png","width":1200,"height":899},{"@type":"BreadcrumbList","@id":"https:\/\/blog.pamas.de\/en\/cleanliness-classes-for-oils-fuels\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/blog.pamas.de\/en\/"},{"@type":"ListItem","position":2,"name":"Cleanliness classes for oils & fuels"}]},{"@type":"WebSite","@id":"https:\/\/blog.pamas.de\/en\/#website","url":"https:\/\/blog.pamas.de\/en\/","name":"PAMAS","description":"Partikelmess- und Analysesysteme","publisher":{"@id":"https:\/\/blog.pamas.de\/en\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blog.pamas.de\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/blog.pamas.de\/en\/#organization","name":"PAMAS","url":"https:\/\/blog.pamas.de\/en\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/blog.pamas.de\/en\/#\/schema\/logo\/image\/","url":"https:\/\/blog.pamas.de\/wp-content\/uploads\/2020\/02\/pamas_logo.png","contentUrl":"https:\/\/blog.pamas.de\/wp-content\/uploads\/2020\/02\/pamas_logo.png","width":291,"height":120,"caption":"PAMAS"},"image":{"@id":"https:\/\/blog.pamas.de\/en\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/blog.pamas.de\/en\/#\/schema\/person\/86e4e5dd30309ee2d351cdf8edeafc66","name":"Harald Bechtle"}]}},"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/blog.pamas.de\/en\/wp-json\/wp\/v2\/posts\/847","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.pamas.de\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.pamas.de\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.pamas.de\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.pamas.de\/en\/wp-json\/wp\/v2\/comments?post=847"}],"version-history":[{"count":17,"href":"https:\/\/blog.pamas.de\/en\/wp-json\/wp\/v2\/posts\/847\/revisions"}],"predecessor-version":[{"id":2185,"href":"https:\/\/blog.pamas.de\/en\/wp-json\/wp\/v2\/posts\/847\/revisions\/2185"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.pamas.de\/en\/wp-json\/wp\/v2\/media\/1599"}],"wp:attachment":[{"href":"https:\/\/blog.pamas.de\/en\/wp-json\/wp\/v2\/media?parent=847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.pamas.de\/en\/wp-json\/wp\/v2\/categories?post=847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.pamas.de\/en\/wp-json\/wp\/v2\/tags?post=847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}