{"id":9737,"date":"2021-02-24T14:24:20","date_gmt":"2021-02-24T13:24:20","guid":{"rendered":"https:\/\/consilab.de\/benefits\/parameters-for-substances\/relative-permittivitaet\/"},"modified":"2022-07-08T10:53:26","modified_gmt":"2022-07-08T08:53:26","slug":"relative-permittivity","status":"publish","type":"page","link":"https:\/\/consilab.de\/en\/benefits\/parameters-for-substances\/relative-permittivity\/","title":{"rendered":"Relative permittivity"},"content":{"rendered":"

[vc_row rt_row_background_width=”fullwidth” rt_row_content_width=”default” rt_row_style=”default-style” rt_row_borders=”” rt_row_shadows=”” rt_row_paddings=”false” rt_bg_effect=”classic” rt_bg_image_repeat=”repeat” rt_bg_size=”cover” rt_bg_position=”right top” rt_bg_attachment=”scroll” rt_bg_video_format=”self-hosted”][vc_column width=”1\/3″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll” class=”download” rt_bg_color=”” rt_bg_overlay_color=”” offset=”vc_hidden-sm vc_hidden-xs” css=”.vc_custom_1532424200870{padding-bottom: 0px !important;}” rt_padding_bottom=”0″][vc_widget_sidebar sidebar_id=”rt-theme-20-common-sidebar”][\/vc_column][vc_column width=”2\/3″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll” class=”maincontent” rt_bg_color=”” rt_bg_overlay_color=”” css=”.vc_custom_1532424195693{margin-bottom: 1em !important;padding-bottom: 2em !important;}”][vc_column_text el_class=”redborderleft”]<\/p>\n

Determining relative permittivity<\/h1>\n

The relative permittivity of a test substance is the ratio of the capacitance of a capacitor \u2013 with the space between and around the electrodes being completely and exclusively filled with the tested substance \u2013 to the capacitance of the same electrode arrangement in a vacuum.<\/h2>\n

Capacitance of the electrode assembly in air can in general be selected instead of that in a vacuum to determine relative permittivity with sufficient accuracy.<\/p>\n

Determining relative permittivity of liquids is based on DIN EN 60247 dated January 2005.<\/p>\n

Permittivity is measured with the Epsilon+ measuring device from flucon fluid control GmbH. A schematic drawing of the electrode arrangement of the measuring cell is shown in Abbildung\u00a01. The measuring cell is constructed like a tubular capacitor and consists of an inner and an outer electrode, and is filled with the test substance.<\/p>\n

The measuring cell (see Figure 1<\/strong>) is placed in a thermostat from OMEGA. The relative permittivity can thus be measured in a temperature range from 20 \u00b0C to 180 \u00b0C. The temperature is set here with an accuracy of 0.03 K. Temperature curves can be measured directly using this method.<\/p>\n

\"\"

Figure 1<\/strong>: Schematic structure of the electrode arrangement of the measuring cell to determine relative permittivity (Epsilon+ from flucon fluid control GmbH)<\/p><\/div>\n

Based on the relative permittivity \u0190r and the conductivity of the liquids, the relaxation time in a conductive or dissipative container or plant component can be determined as defined in TRGS 727[1]<\/a> according to the following equation:<\/p>\n

\u01ac = \u01900<\/sub> \u00b7 \u0190r<\/sub> \/ k<\/p>\n

The relative permittivity is also required to adjust or correct functioning of capacitive level probes, among other things.<\/p>\n

[1]<\/a> TRGS 727 Avoidance of ignition hazards due to electrostatic charges, January 2016[\/vc_column_text][vc_row_inner rt_row_style=”global-style” rt_bg_custom_alignment=”top”][vc_column_inner width=”1\/2″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll”][vc_btn title=”Parameters for substances” style=”classic” color=”purple” i_icon_fontawesome=”fas fa-angle-left” add_icon=”true” link=”url:%2Fen%2Fbenefits%2Fparameters-for-substances%2F” el_class=”btn–red”][\/vc_column_inner][vc_column_inner width=”1\/2″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll”][vc_btn title=”Benefits” style=”classic” color=”purple” i_icon_fontawesome=”fas fa-angle-left” add_icon=”true” link=”url:%2Fen%2Fbenefits%2F|title:Benefits” el_class=”btn–red”][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"

[vc_row rt_row_background_width=”fullwidth” rt_row_content_width=”default” rt_row_style=”default-style” rt_row_borders=”” rt_row_shadows=”” rt_row_paddings=”false” rt_bg_effect=”classic” rt_bg_image_repeat=”repeat” rt_bg_size=”cover” rt_bg_position=”right top” rt_bg_attachment=”scroll” rt_bg_video_format=”self-hosted”][vc_column width=”1\/3″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll” class=”download” rt_bg_color=”” rt_bg_overlay_color=”” offset=”vc_hidden-sm vc_hidden-xs” css=”.vc_custom_1532424200870{padding-bottom: 0px !important;}” rt_padding_bottom=”0″][vc_widget_sidebar sidebar_id=”rt-theme-20-common-sidebar”][\/vc_column][vc_column width=”2\/3″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll” class=”maincontent” rt_bg_color=”” rt_bg_overlay_color=”” css=”.vc_custom_1532424195693{margin-bottom: 1em !important;padding-bottom: 2em !important;}”][vc_column_text el_class=”redborderleft”] Determining relative permittivity The relative permittivity of a test substance …
more | mehr<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":3889,"menu_order":18,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-9737","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/consilab.de\/en\/wp-json\/wp\/v2\/pages\/9737","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/consilab.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/consilab.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/consilab.de\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/consilab.de\/en\/wp-json\/wp\/v2\/comments?post=9737"}],"version-history":[{"count":2,"href":"https:\/\/consilab.de\/en\/wp-json\/wp\/v2\/pages\/9737\/revisions"}],"predecessor-version":[{"id":12014,"href":"https:\/\/consilab.de\/en\/wp-json\/wp\/v2\/pages\/9737\/revisions\/12014"}],"up":[{"embeddable":true,"href":"https:\/\/consilab.de\/en\/wp-json\/wp\/v2\/pages\/3889"}],"wp:attachment":[{"href":"https:\/\/consilab.de\/en\/wp-json\/wp\/v2\/media?parent=9737"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}