{"id":10988,"date":"2026-02-10T10:36:45","date_gmt":"2026-02-10T09:36:45","guid":{"rendered":"https:\/\/www.bsc-industrie.com\/?p=10988"},"modified":"2026-02-10T11:20:02","modified_gmt":"2026-02-10T10:20:02","slug":"guide-how-to-choose-the-right-moisture-sensor","status":"publish","type":"post","link":"https:\/\/www.bsc-industrie.com\/en\/concrete-industry\/guide-how-to-choose-the-right-moisture-sensor\/","title":{"rendered":"Guide \u2014 CERIB characterisation of POLARMOIST\u2122"},"content":{"rendered":"<p>[vc_row][vc_column offset=&#8221;vc_col-lg-9 vc_col-md-9&#8243; css=&#8221;.vc_custom_1452702342137{padding-right: 45px !important;}&#8221;][vc_custom_heading text=&#8221;POLARMOIST\u2122: what the CERIB characterisation reveals&#8221; font_container=&#8221;tag:h1|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221; el_class=&#8221;no_stripe&#8221; css=&#8221;.vc_custom_1770713723595{margin-top: 40px !important;}&#8221;][stm_post_details][vc_column_text css=&#8221;.vc_custom_1770714047726{margin-bottom: 20px !important;}&#8221;]When a moisture measurement solution is intended for integration into production, the question of metrological reliability becomes central: accuracy, repeatability, sensitivity to real conditions (distance, angle, light, temperature). In this context, a series of tests was carried out at CERIB to evaluate the performance of the <strong><a href=\"https:\/\/www.bsc-industrie.com\/en\/?post_type=stm_works&amp;p=10430\">POLARMOIST\u2122<\/a><\/strong> infrared (IR) sensor and compare its measurements with \u2018real\u2019 reference measurements, in order to objectively assess the margins of error and influencing factors.[\/vc_column_text][vc_empty_space height=&#8221;15px&#8221;][vc_row_inner css=&#8221;.vc_custom_1452700243026{margin-bottom: 39px !important;}&#8221;][vc_column_inner width=&#8221;1\/2&#8243;][vc_custom_heading text=&#8221;Context: samples, method and measurement framework&#8221; use_theme_fonts=&#8221;yes&#8221;][vc_column_text]Campaign is being conducted<strong> in a climate-controlled laboratory (21\u00b0C \u00b1 2\u00b0C)<\/strong>, on <strong>a sample of five aggregates<\/strong> of different origins and types (G1 to G5): limestone, alluvial, siliceous, quartz and mixed.[\/vc_column_text][\/vc_column_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;10972&#8243; img_size=&#8221;full&#8221;][\/vc_column_inner][\/vc_row_inner][vc_row_inner content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1769779355908{margin-bottom: 39px !important;}&#8221;][vc_column_inner][vc_column_text]Approach is based on a simple and operational principle: <strong>a calibration curve established from two points for each aggregate,<\/strong> followed by a series of measurements taken with the sensor in the defined configuration.<\/p>\n<p>Sensor is positioned above the sample, with two structural geometric parameters:<\/p>\n<ul>\n<li><strong>B<\/strong> : sensor-surface distance,<\/li>\n<li><strong>\u03b8<\/strong> : measurement angle (\u03b8 = 0\u00b0 corresponding to a vertical measurement).<\/li>\n<\/ul>\n<p>Several conditions of use are then tested: <strong>distance<\/strong>, <strong>angle<\/strong>, <strong>sample temperature<\/strong> and <strong>lighting conditions.<\/strong>[\/vc_column_text][vc_custom_heading text=&#8221;Results: trends observed for the five aggregates&#8221; use_theme_fonts=&#8221;yes&#8221;][\/vc_column_inner][\/vc_row_inner][vc_row_inner content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1769779355908{margin-bottom: 39px !important;}&#8221;][vc_column_inner width=&#8221;1\/2&#8243;][vc_column_text]Tests highlight measurement behaviours that depend on the aggregate and the associated calibration.<\/p>\n<ul>\n<li><strong>G1<\/strong>: tendency to <strong>underestimate <\/strong>the \u2018actual\u2019 relative humidity by <strong>9 to 19%<\/strong> depending on the measured value; software corrections are mentioned by the manufacturer to reduce the discrepancy.<\/li>\n<li><strong>G2<\/strong> : tendency to <strong>underestimate<\/strong> by <strong>0 to 17%<\/strong> depending on the measured value; software corrections also mentioned by the manufacturer.<\/li>\n<li><strong>G3<\/strong> : tendency to <strong>underestimate<\/strong> by <strong>5 to 11% <\/strong>depending on the measured value; software corrections mentioned.<\/li>\n<li><strong>G4 et G5<\/strong> : tendency to <strong>overestimate <\/strong>more, with the same logic: corrections possible via software according to the manufacturer.<\/li>\n<\/ul>\n<p>For all points, the report provides a <strong>graphical summary <\/strong>linking \u2018actual\u2019 humidity and measured humidity, which is useful for visualising the dispersion by granule.[\/vc_column_text][\/vc_column_inner][vc_column_inner width=&#8221;1\/2&#8243;][vc_single_image image=&#8221;10974&#8243; img_size=&#8221;full&#8221;][\/vc_column_inner][\/vc_row_inner][vc_row_inner content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1769779355908{margin-bottom: 39px !important;}&#8221;][vc_column_inner][vc_custom_heading text=&#8221;Influencing factors: what the campaign highlights&#8221; use_theme_fonts=&#8221;yes&#8221;][vc_custom_heading text=&#8221;Angle and distance: the two most influential parameters&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221;][vc_column_text]Campaign observes that an<strong> increase in distance and\/or angle <\/strong>tends to <strong>increase the relative humidity measurement<\/strong> made by the probe; as a result, <strong>any change in position (angle\/distance) requires recalibration.<\/strong>[\/vc_column_text][vc_custom_heading text=&#8221;Lighting conditions: measurable impact, to be framed&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221;][vc_column_text]Measurements show a <strong>variation in the humidity measured depending on the lighting conditions <\/strong>(examples reported with UV, TL84, D65, and a case of saturation). The associated operational recommendation: <strong>regulate the lighting conditions in the measurement area<\/strong> and <strong>establish a calibration curve adapted to the context.<\/strong>[\/vc_column_text][vc_custom_heading text=&#8221;Temperature: effect deemed insignificant in the range tested&#8221; font_container=&#8221;tag:h3|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221;][vc_column_text]In the range observed (21\u00b0C to 125\u00b0C), the report notes a <strong>minimal variation<\/strong>: a variation of <strong>around 0.1% relative humidity for ~50\u00b0C<\/strong>, and qualifies this variation as <strong>insignificant <\/strong>for the intended use on aggregates in standard concrete.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1769779355908{margin-bottom: 39px !important;}&#8221;][vc_column_inner][vc_custom_heading text=&#8221;Acquisition speed and repeatability: a highlighted strength&#8221; use_theme_fonts=&#8221;yes&#8221;][vc_column_text]Report highlights <strong>very fast acquisition<\/strong> (in the order of <strong>5 to 8 points per second<\/strong>) and concludes, under laboratory conditions and on the aggregates tested, that <strong>repeatability is considered \u2018more than acceptable\u2019<\/strong>. <strong>Non-contact<\/strong> aspect is presented as facilitating measurement and maintenance.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1769779355908{margin-bottom: 39px !important;}&#8221;][vc_column_inner][vc_custom_heading text=&#8221;Industrial implications: conditions for success, without excessive promises&#8221; use_theme_fonts=&#8221;yes&#8221;][vc_column_text]In an industrial setting where <strong>the angle and distance remain fixed<\/strong> and <strong>brightness remains stable<\/strong>, correct calibration over the <strong>usual range of humidity<\/strong> makes the tool effective, even with temperature variations between 1\u00b0C and 30\u00b0C.<\/p>\n<p>Key point emerging from the characterisation: <strong>performance depends heavily on control of measurement conditions and calibration discipline<\/strong> (particularly after any change in angle\/distance, and in the event of variations in brightness).[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1769779355908{margin-bottom: 39px !important;}&#8221;][vc_column_inner][vc_images_carousel images=&#8221;11082,11083,11060,11061,11062,11063,11064,11065,11066,11067,11068,11069,11070,11071,11072,11073,11074,11075,11076,11077,11078,11079,11080,11081&#8243; img_size=&#8221;full&#8221;][\/vc_column_inner][\/vc_row_inner][vc_row_inner content_placement=&#8221;middle&#8221; css=&#8221;.vc_custom_1769779355908{margin-bottom: 39px !important;}&#8221;][vc_column_inner][vc_custom_heading text=&#8221;Source citation and publication precautions&#8221; font_container=&#8221;tag:h4|text_align:left&#8221; use_theme_fonts=&#8221;yes&#8221;][vc_column_text]Summary is based on <strong>CERIB test report no. 054959,<\/strong> published on <strong>22\/12\/2025<\/strong>. The report states that its results relate to the<strong> sample received and tested<\/strong>, and that the document does not constitute product certification; reproduction of the report is authorised only in its entirety.[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_row_inner css=&#8221;.vc_custom_1452700243026{margin-bottom: 39px !important;}&#8221;][vc_column_inner][stm_spacing][vc_empty_space height=&#8221;40&#8243;][\/vc_column_inner][\/vc_row_inner][\/vc_column][vc_column width=&#8221;1\/4&#8243; offset=&#8221;vc_hidden-sm vc_hidden-xs&#8221;][stm_sidebar sidebar=&#8221;527&#8243;][\/vc_column][\/vc_row][vc_row full_width=&#8221;stretch_row&#8221; css=&#8221;.vc_custom_1459505959648{margin-bottom: -60px !important;}&#8221; el_class=&#8221;third_bg_color&#8221;][vc_column][vc_cta h2=&#8221;Questions ? Need additional information?&#8221; h2_font_container=&#8221;tag:h2|font_size:20px|text_align:left|color:%23000000|line_height:24px&#8221; h2_use_theme_fonts=&#8221;yes&#8221; shape=&#8221;square&#8221; style=&#8221;flat&#8221; add_button=&#8221;right&#8221; btn_title=&#8221;Contact&#8221; btn_style=&#8221;flat&#8221; btn_color=&#8221;theme_style_2&#8243; btn_size=&#8221;lg&#8221; btn_align=&#8221;right&#8221; btn_i_align=&#8221;right&#8221; btn_i_icon_fontawesome=&#8221;far fa-arrow-alt-circle-right&#8221; use_custom_fonts_h2=&#8221;true&#8221; btn_add_icon=&#8221;true&#8221; btn_link=&#8221;url:https%3A%2F%2Fwww.bsc-industrie.com%2Fen%2Fcontact%2F|title:Contact|&#8221; el_class=&#8221;third_bg_color&#8221; css=&#8221;.vc_custom_1649175355736{margin-bottom: 0px !important;}&#8221;][\/vc_cta][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Discover CERIB&#8217;s characterisation of the POLARMOIST\u2122 IR sensor: protocol, aggregates tested, influencing factors (angle, distance, light) and recommendations for use.<\/p>\n","protected":false},"author":2,"featured_media":11085,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"%%sitetitle%% %%sep%% %%post_title%%","_seopress_titles_desc":"Discover CERIB's characterisation of the POLARMOIST\u2122 probe: protocol, aggregates tested, influencing factors and recommendations for use.","_seopress_robots_index":"","footnotes":""},"categories":[112],"tags":[],"class_list":["post-10988","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-concrete-industry"],"_links":{"self":[{"href":"https:\/\/www.bsc-industrie.com\/en\/wp-json\/wp\/v2\/posts\/10988","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bsc-industrie.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bsc-industrie.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bsc-industrie.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bsc-industrie.com\/en\/wp-json\/wp\/v2\/comments?post=10988"}],"version-history":[{"count":7,"href":"https:\/\/www.bsc-industrie.com\/en\/wp-json\/wp\/v2\/posts\/10988\/revisions"}],"predecessor-version":[{"id":11084,"href":"https:\/\/www.bsc-industrie.com\/en\/wp-json\/wp\/v2\/posts\/10988\/revisions\/11084"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.bsc-industrie.com\/en\/wp-json\/wp\/v2\/media\/11085"}],"wp:attachment":[{"href":"https:\/\/www.bsc-industrie.com\/en\/wp-json\/wp\/v2\/media?parent=10988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bsc-industrie.com\/en\/wp-json\/wp\/v2\/categories?post=10988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bsc-industrie.com\/en\/wp-json\/wp\/v2\/tags?post=10988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}