{"id":7665,"date":"2018-04-03T12:28:08","date_gmt":"2018-04-03T10:28:08","guid":{"rendered":"https:\/\/blog.wika.com\/fr\/?p=7665"},"modified":"2023-11-17T08:18:24","modified_gmt":"2023-11-17T07:18:24","slug":"les-thermometres-pour-temperatures-ambiantes-tres-basses","status":"publish","type":"post","link":"https:\/\/blog.wika.com\/fr\/produits\/produits-temperature\/les-thermometres-pour-temperatures-ambiantes-tres-basses\/","title":{"rendered":"Les thermom\u00e8tres pour temp\u00e9ratures ambiantes tr\u00e8s basses"},"content":{"rendered":"<p><strong>Les temp\u00e9ratures moyennes de -60 \u00b0 C ne font pas frissonner les fabricants de sondes de temp\u00e9rature, mais lorsqu\u2019on parle de temp\u00e9ratures ambiantes \u00e0 -60 \u00b0 C, cela se complique.<\/strong><\/p>\n<p>Il devient rapidement clair que l&rsquo;on ne peut pas utiliser facilement des instruments standard dans ces conditions. Le r\u00e9chauffement climatique, d&rsquo;une part, et des demandes d&rsquo;\u00e9quipement pour une utilisation \u00e0 des temp\u00e9ratures ambiantes tr\u00e8s basses d\u2019autre part, cela peut surprendre. N\u00e9anmoins, c&rsquo;est la r\u00e9alit\u00e9. R\u00e9cemment, on utilisait -40\u00b0C comme temp\u00e9rature d&rsquo;essai la plus basse (temp\u00e9rature ambiante), aujourd&rsquo;hui cette temp\u00e9rature se d\u00e9place de plus en plus vers -60\u00b0C.<\/p>\n<p>L&rsquo;une des raisons de la demande croissante d&rsquo;instrumentation pour une utilisation \u00e0 des temp\u00e9ratures ambiantes aussi basses est la recherche de p\u00e9trole, de gaz et d&rsquo;autres min\u00e9raux vers des r\u00e9gions plus froides. Mais ce ne sont pas seulement les causes m\u00e9trologiques et g\u00e9ographiques qui conduisent \u00e0 ces exigences. Les applications dans le domaine des gaz liquides n\u00e9cessitent \u00e9galement l&rsquo;utilisation de sondes appropri\u00e9es.<\/p>\n\n      <div class=\"wp-caption alignnone\" style=\"max-width:846px;\"><img decoding=\"async\" src=\"https:\/\/blog.wika.com\/fr\/wp-content\/blogs.dir\/26\/files\/2018\/03\/umgebungstemperaturen-838x260.jpg\" alt=\"Cold environments and liquid gases\" \/><p class=\"wp-caption-text\">Environnements froids et gaz liquides<\/p><\/div>\n    \n<p>\nLes sondes \u00e0 r\u00e9sistance standard ne conviennent pas \u00e0 ces basses temp\u00e9ratures. Le d\u00e9veloppement de sondes sp\u00e9ciales mesurant des temp\u00e9ratures basses et qui supportent \u00e9galement des temp\u00e9ratures ambiantes de -60\u00b0 en est la cons\u00e9quence logique.<\/p>\n<h2>Exemples de thermom\u00e8tres adapt\u00e9s aux basses temp\u00e9ratures ambiantes<\/h2>\n\n      <div class=\"wp-caption alignright\" style=\"max-width:396px;\"><img decoding=\"async\" src=\"https:\/\/blog.wika.com\/fr\/wp-content\/blogs.dir\/26\/files\/2018\/03\/elektrische-thermometer_-388x239.jpg\" alt=\"Left: Model TR40 resistance thermometer with connection cable (wide range of applications) Right: Model TR12-B resistance thermometer for the process industry (petrochemical industry, oil and gas industry)\" \/><p class=\"wp-caption-text\">\u00c0 gauche: sonde \u00e0 r\u00e9sistance mod\u00e8le TR40 avec c\u00e2ble de raccordement (large gamme d&rsquo;applications). \u00c0 droite: sonde \u00e0 r\u00e9sistance mod\u00e8le TR12-B pour les proc\u00e9d\u00e9s industriels (chimie, p\u00e9trochimie, p\u00e9troli\u00e8re et gazi\u00e8re)<\/p><\/div>\n    \n<p>Les versions sp\u00e9ciales, m\u00eame si elles sont difficiles \u00e0 diff\u00e9rencier des instruments standard, imposent des exigences \u00e9lev\u00e9es dans leur conception, leur fabrication et les mat\u00e9riaux utilis\u00e9s. Afin de garantir une fiabilit\u00e9 de fonctionnement optimale, les composants de ces thermom\u00e8tres sp\u00e9ciaux sont fabriqu\u00e9s exclusivement \u00e0 partir de mat\u00e9riaux adapt\u00e9s aux basses temp\u00e9ratures.<\/p>\n<p>Les exigences sur les composants et les instruments fabriqu\u00e9s sont \u00e9lev\u00e9es. La r\u00e9sistance aux chocs doit, par exemple, \u00eatre test\u00e9e aux points les plus faibles de l&rsquo;ext\u00e9rieur de l&rsquo;\u00e9l\u00e9ment. Ces essais doivent \u00eatre effectu\u00e9s sur des sondes mont\u00e9es pr\u00eates \u00e0 l&#8217;emploi.<\/p>\n<p>&nbsp;<\/p>\n\n      <div class=\"wp-caption alignright\" style=\"max-width:396px;\"><img decoding=\"async\" src=\"https:\/\/blog.wika.com\/fr\/wp-content\/blogs.dir\/26\/files\/2018\/03\/ip65test-388x270.jpg\" alt=\"IP65 test per IEC 60529\" \/><p class=\"wp-caption-text\">Test IP65 selon la norme CEI 60529<\/p><\/div>\n    \n<p>L&rsquo;une des principales raisons de la n\u00e9cessit\u00e9 d&rsquo;\u00e9tudes aussi pouss\u00e9es et de leur documentation est le comportement des plastiques \u00e0 basse temp\u00e9rature. Ici, la fragilisation croissante \u00e0 des temp\u00e9ratures tr\u00e8s basses indique les limites de l\u2019utilisation de ces mat\u00e9riaux (par exemple dans les presse-\u00e9toupes et leurs joints).<br \/>\n\u00a0\u00a0\u00a0<br \/>\nMais ce ne sont pas seulement les joints, mais aussi les compos\u00e9s d&rsquo;\u00e9tanch\u00e9it\u00e9, les colles, les surfaces peintes et (souvent n\u00e9glig\u00e9es) les gaines sur les c\u00e2bles de connexion \u00e0 l&rsquo;int\u00e9rieur des bo\u00eetiers, qui doivent r\u00e9pondre aux exigences d\u00e9finies par les temp\u00e9ratures d&rsquo;essai. Les c\u00e2bles sont de pr\u00e9f\u00e9rence stable \u00e0 ces temp\u00e9ratures ambiantes, c&rsquo;est-\u00e0-dire install\u00e9s de mani\u00e8re fixe. Cela emp\u00eache les micro-fissures et donc la p\u00e9n\u00e9tration possible de l&rsquo;humidit\u00e9. Les composants \u00e9lectroniques tels que les \u00e9crans et les transmetteurs ont d\u00e9j\u00e0 \u00e9t\u00e9 d\u00e9velopp\u00e9s pour des applications dans des conditions ambiantes extr\u00eames. Ici, l&rsquo;adaptation r\u00e9troactive aux basses temp\u00e9ratures n&rsquo;est souvent plus possible.<br \/>\n\u00a0\u00a0\u00a0<br \/>\nAfin d&rsquo;assurer la s\u00e9curit\u00e9 du process aux basses temp\u00e9ratures mentionn\u00e9es, les temp\u00e9ratures d&rsquo;essai ont \u00e9t\u00e9 diminu\u00e9 en fonction d\u2019un facteur de s\u00e9curit\u00e9. Les instruments avec protection contre les explosions sont test\u00e9s \u00e0 une temp\u00e9rature d&rsquo;essai de -70\u00b0C. Des temp\u00e9ratures ambiantes qui ne sont pas probl\u00e9matiques pour l&rsquo;acier inoxydable peuvent entra\u00eener des probl\u00e8mes avec les alliages d&rsquo;aluminium. Par cons\u00e9quent, les composants m\u00e9talliques des sondes sont \u00e9galement test\u00e9s pour la r\u00e9sistance aux chocs \u00e0 -70 \u00b0 C.<\/p>\n<p><strong>Conclusion<\/strong><br \/>\n\u00a0Les diff\u00e9rents composants critiques ainsi que les produits finis subissent donc un grand nombre de tests sp\u00e9cifiques avant que les sondes soient envoy\u00e9es au client.<\/p>\n<p><strong>Note<\/strong><br \/>\n\u00a0Vous trouverez des informations sur nos<a href=\"https:\/\/www.wika.com\/fr-fr\/produits.WIKA?subnav=2\" rel=\"external\" target=\"_blank\"> instruments de mesure de temp\u00e9rature<\/a>, tels que les <a href=\"https:\/\/www.wika.com\/fr-fr\/sondes_a_resistance.WIKA\" rel=\"external\" target=\"_blank\">sondes \u00e0 r\u00e9sistance<\/a> et les <a href=\"https:\/\/www.wika.com\/fr-fr\/thermocouples.WIKA\" rel=\"external\" target=\"_blank\">thermocouples<\/a>, sur le site Web de WIKA.<\/p>\n<div data-fullscreen=\"disabled\" data-mode=\"normal\" data-oembed=\"1\" data-provider=\"youtube\" data-reset-after-played id=\"arve-youtube-9wp9u9wcqq0\" style=\"max-width:900px;\" class=\"arve\">\n<div class=\"arve-inner\">\n<div style=\"aspect-ratio:500\/281\" class=\"arve-embed arve-embed--has-aspect-ratio\">\n<div class=\"arve-ar\" style=\"padding-top:56.200000%\"><\/div>\n<p>\t\t\t<iframe allow=\"accelerometer &apos;none&apos;;autoplay &apos;none&apos;;bluetooth &apos;none&apos;;browsing-topics &apos;none&apos;;camera &apos;none&apos;;clipboard-read &apos;none&apos;;clipboard-write;display-capture &apos;none&apos;;encrypted-media &apos;none&apos;;gamepad &apos;none&apos;;geolocation &apos;none&apos;;gyroscope &apos;none&apos;;hid &apos;none&apos;;identity-credentials-get &apos;none&apos;;idle-detection &apos;none&apos;;keyboard-map &apos;none&apos;;local-fonts;magnetometer &apos;none&apos;;microphone &apos;none&apos;;midi &apos;none&apos;;otp-credentials &apos;none&apos;;payment &apos;none&apos;;picture-in-picture;publickey-credentials-create &apos;none&apos;;publickey-credentials-get &apos;none&apos;;screen-wake-lock &apos;none&apos;;serial &apos;none&apos;;summarizer &apos;none&apos;;sync-xhr;usb &apos;none&apos;;web-share;window-management &apos;none&apos;;xr-spatial-tracking &apos;none&apos;;\" allowfullscreen=\"\" class=\"arve-iframe fitvidsignore\" credentialless data-arve=\"arve-youtube-9wp9u9wcqq0\" data-lenis-prevent=\"\" data-src-no-ap=\"https:\/\/www.youtube-nocookie.com\/embed\/9wp9U9wCqQ0?feature=oembed&amp;iv_load_policy=3&amp;modestbranding=1&amp;rel=0&amp;autohide=1&amp;playsinline=0&amp;autoplay=0&amp;enablejsapi=1\" frameborder=\"0\" height=\"505.8\" loading=\"lazy\" name=\"\" referrerpolicy=\"strict-origin-when-cross-origin\" sandbox=\"allow-scripts allow-same-origin allow-presentation allow-popups allow-popups-to-escape-sandbox\" scrolling=\"no\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/9wp9U9wCqQ0?feature=oembed&#038;iv_load_policy=3&#038;modestbranding=1&#038;rel=0&#038;autohide=1&#038;playsinline=0&#038;autoplay=0&#038;enablejsapi=1\" title=\"Thermocouple basic working principles |  How does a thermocouple work?\" width=\"900\"><\/iframe><\/p><\/div>\n<\/p><\/div>\n<p>\t<script type=\"application\/ld+json\">{\"@context\":\"http:\\\/\\\/schema.org\\\/\",\"@id\":\"https:\\\/\\\/blog.wika.com\\\/fr\\\/produits\\\/produits-temperature\\\/les-thermometres-pour-temperatures-ambiantes-tres-basses\\\/#arve-youtube-9wp9u9wcqq0\",\"type\":\"VideoObject\",\"embedURL\":\"https:\\\/\\\/www.youtube-nocookie.com\\\/embed\\\/9wp9U9wCqQ0?feature=oembed&iv_load_policy=3&modestbranding=1&rel=0&autohide=1&playsinline=0&autoplay=0&enablejsapi=1\",\"name\":\"Thermocouple basic working principles |  How does a thermocouple work?\",\"thumbnailUrl\":\"https:\\\/\\\/i.ytimg.com\\\/vi\\\/9wp9U9wCqQ0\\\/hqdefault.jpg\",\"uploadDate\":\"2019-05-15T08:33:53Z\",\"author\":\"WIKA Group\",\"description\":\"What is a thermocouple and its working principles? What are the types of thermocouple and how do they work? Up to how many degrees Celsius or Fahrenheit can you use thermocouples? These and other basics are explained in this video.\\n\\n\\u25ac Contents of this video \\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac \\n00:00 - Intro \\n00:04 - How do thermocouples work?\\n00:55 - When is a reference junction compensation necessary when using thermocouples?\\n01:25 - What is a thermoelectric voltage curve and what material pairings are used for it?\\n01:58 - What are the types of thermocouples?\\n\\n#Thermocouple #ThermocoupleWorkingPrinciples #WIKAgroup #ThermocoupleTypes #HowThermocouplesWork \\n\\nThermocouples are made from two wires of different metals, which are in contact with each other at the measuring point. Due to their high vibration resistance, thermocouples that are welded firmly together are used in industrial applications. Thermocouples are temperature sensors that generate a voltage directly dependent on temperature. Compared to resistance thermometers, they are particularly suited for high temperatures up to 1,700 \\u00b0C. \\n\\nThere are a variety of thermocouple types that are suitable for a number of temperature ranges. Their accuracies are defined by the standards IEC 60584-1 and ASTM E230 and can be read in limit value tables. \\n\\n-------------------------------------------------------------------------------\\n\\u00a0\\n\\ud83d\\udd27 A detailed explanation of the \\u201cuse of thermocouples\\u201d can be found in our Technical information IN 00.23, which you can download free of charge from our website: \\n \\n\\ud83c\\udf10 Through our product configurator, which is available for the different types, you can assemble the perfect thermocouple for your application: \\n \\n\\ud83d\\udcf0 Please also read our trade article on \\u201cSpoilt for choice  - Criteria for selecting the most suitable electrical temperature measuring point\\u201d:  \\n \\n\\ud83d\\udcd6 In the following blog post we explain to you mineral-insulated cables, which are important components of electrical thermometers: \\n\\n\\ud83d\\udcfa How a resistance thermometer works is explained in this video: \\n\\n-------------------------------------------------------------------------------\\n\\nFollow us on our social media channels:\\n\\ud83d\\udcfa YouTube: \\n\\ud83c\\udfaf LinkedIn:\"}<\/script><\/p>\n<\/div>\n<div data-fullscreen=\"disabled\" data-mode=\"normal\" data-oembed=\"1\" data-provider=\"youtube\" data-reset-after-played id=\"arve-youtube-hxmytpddn7g\" style=\"max-width:900px;\" class=\"arve\">\n<div class=\"arve-inner\">\n<div style=\"aspect-ratio:500\/281\" class=\"arve-embed arve-embed--has-aspect-ratio\">\n<div class=\"arve-ar\" style=\"padding-top:56.200000%\"><\/div>\n<p>\t\t\t<iframe allow=\"accelerometer &apos;none&apos;;autoplay &apos;none&apos;;bluetooth &apos;none&apos;;browsing-topics &apos;none&apos;;camera &apos;none&apos;;clipboard-read &apos;none&apos;;clipboard-write;display-capture &apos;none&apos;;encrypted-media &apos;none&apos;;gamepad &apos;none&apos;;geolocation &apos;none&apos;;gyroscope &apos;none&apos;;hid &apos;none&apos;;identity-credentials-get &apos;none&apos;;idle-detection &apos;none&apos;;keyboard-map &apos;none&apos;;local-fonts;magnetometer &apos;none&apos;;microphone &apos;none&apos;;midi &apos;none&apos;;otp-credentials &apos;none&apos;;payment &apos;none&apos;;picture-in-picture;publickey-credentials-create &apos;none&apos;;publickey-credentials-get &apos;none&apos;;screen-wake-lock &apos;none&apos;;serial &apos;none&apos;;summarizer &apos;none&apos;;sync-xhr;usb &apos;none&apos;;web-share;window-management &apos;none&apos;;xr-spatial-tracking &apos;none&apos;;\" allowfullscreen=\"\" class=\"arve-iframe fitvidsignore\" credentialless data-arve=\"arve-youtube-hxmytpddn7g\" data-lenis-prevent=\"\" data-src-no-ap=\"https:\/\/www.youtube-nocookie.com\/embed\/HXMytpddn7g?feature=oembed&amp;iv_load_policy=3&amp;modestbranding=1&amp;rel=0&amp;autohide=1&amp;playsinline=0&amp;autoplay=0&amp;enablejsapi=1\" frameborder=\"0\" height=\"505.8\" loading=\"lazy\" name=\"\" referrerpolicy=\"strict-origin-when-cross-origin\" sandbox=\"allow-scripts allow-same-origin allow-presentation allow-popups allow-popups-to-escape-sandbox\" scrolling=\"no\" src=\"https:\/\/www.youtube-nocookie.com\/embed\/HXMytpddn7g?feature=oembed&#038;iv_load_policy=3&#038;modestbranding=1&#038;rel=0&#038;autohide=1&#038;playsinline=0&#038;autoplay=0&#038;enablejsapi=1\" title=\"How does a resistance thermometer work? | Resistance thermometers per IEC 60751\" width=\"900\"><\/iframe><\/p><\/div>\n<\/p><\/div>\n<p>\t<script type=\"application\/ld+json\">{\"@context\":\"http:\\\/\\\/schema.org\\\/\",\"@id\":\"https:\\\/\\\/blog.wika.com\\\/fr\\\/produits\\\/produits-temperature\\\/les-thermometres-pour-temperatures-ambiantes-tres-basses\\\/#arve-youtube-hxmytpddn7g\",\"type\":\"VideoObject\",\"embedURL\":\"https:\\\/\\\/www.youtube-nocookie.com\\\/embed\\\/HXMytpddn7g?feature=oembed&iv_load_policy=3&modestbranding=1&rel=0&autohide=1&playsinline=0&autoplay=0&enablejsapi=1\",\"name\":\"How does a resistance thermometer work? | Resistance thermometers per IEC 60751\",\"thumbnailUrl\":\"https:\\\/\\\/i.ytimg.com\\\/vi\\\/HXMytpddn7g\\\/hqdefault.jpg\",\"uploadDate\":\"2019-03-08T15:11:46Z\",\"author\":\"WIKA Group\",\"description\":\"What exactly is a resistance thermometer, a Pt100 or a Pt1000 sensor? How do Pt100 and Pt1000 resistance sensors differ? These and other important differences are explained in this video about electrical thermometers.\\n\\n#Temperature #ProcessControl #Thermometer #TemperatureMeasurement #IndustrialAutomation\\n\\n\\u25ac Contents of this video \\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac\\u25ac \\n0:00 Intro \\n0:12 Resistance thermometer working principle\\n0:47 Platinum resistance thermometer range\\n1:21 RTD: accuracy and standard measuring range\\n1:57 Pt100 temperature sensor: an industrial standard\\n2:10 Pt1000 and Pt25: for special cases\\n\\u00a0\\nUsually, two different types of electrical thermometers are used in industrial applications \\u2013 resistance thermometers and thermocouples. How thermocouples work is explained in this video:  With resistance thermometers, the temperature is determined using an ohmic measuring resistor. The \\u201cPt\\u201d in Pt100 stands for the chemical element platinum, the next digit indicates the resistance value of the sensor at zero degrees Celsius. The most frequently used measuring resistor, the Pt100, therefore has an electrical resistance of 100 \\u03a9 (ohms) at 0 \\u00b0C. In special applications, Pt1000 temperature sensors are also used. As the temperature drops or rises, the electrical resistance changes \\u2013 following a defined characteristic curve which is regulated by international standards. The temperature can be determined very precisely on the basis of the measured resistance.\\n\\u00a0\\nAccuracy and measuring ranges of Pt100\\\/Pt1000 temperature probes\\nAs with the traditional dial thermometer (see also our video for correct reading of thermometers:  the resistance thermometer has different accuracy classes. The following applies: The more accurately a resistance thermometer should measure, the more limited its permissible measuring range is. Likewise, you must also consider the type (design) of the measuring resistor.\\nIs a thin-film or wire-wound resistor used? Depending on the measuring resistor selected, there are different temperature measuring ranges based on the IEC 60751 standard. For example, class B wire-wound resistance thermometers have a defined measuring range of -196 \\u00b0C to a maximum of 600 \\u00b0C. If the temperature exceeds or drops below this range, the measured values of the temperature sensors begin to drift so they no longer measure within the defined accuracy and thus the measuring result is falsified. With the current level of technology, for thin-film sensors, this drift is stronger than with wire-wound sensors.\\n\\u00a0\\nFurther information on Pt100 and Pt1000 sensors can be found on our website: \\n\\u00a0\\n\\ud83d\\uded2 With WIKA, you can configure and order the most common resistance thermometers directly in the online shop:  \\n\\n\\ud83c\\udf10 You can find an overview of all resistance thermometers on our website: \\n\\u00a0\\n\\ud83d\\udcd6 Would you like to learn more about resistance thermometers? Then read our blog ( or the technical information on the subject \\u201cOperating limits and accuracies of platinum resistance thermometers per DIN EN IEC 60751\\u201d (\\n\\n-------------------------------------------------------------------------------\\n\\nFollow us on our social media channels:\\n\\ud83d\\udcfa YouTube: \\n\\u2705 LinkedIn:\"}<\/script><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Les temp\u00e9ratures moyennes de -60 \u00b0 C ne font pas frissonner les fabricants de sondes de temp\u00e9rature, mais lorsqu\u2019on parle de temp\u00e9ratures ambiantes \u00e0 -60 \u00b0 C, cela se complique. Il devient rapidement clair que l&rsquo;on ne peut pas utiliser facilement des instruments standard dans ces conditions. Le r\u00e9chauffement climatique, d&rsquo;une part, et des demandes [&hellip;]<\/p>\n","protected":false},"author":176,"featured_media":7672,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[232,221],"tags":[304],"class_list":["post-7665","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-applications","category-produits-temperature","tag-thermometre"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Les thermom\u00e8tres pour temp\u00e9ratures ambiantes tr\u00e8s basses - Blog WIKA<\/title>\n<meta name=\"description\" content=\"Lorsqu&#039;on parle de temp\u00e9ratures ambiantes de -60 \u00b0C, il est clair qu&#039;on ne peut pas utiliser des instruments standard. 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