{"id":4882,"date":"2021-03-11T20:15:53","date_gmt":"2021-03-11T20:15:53","guid":{"rendered":"https:\/\/www.minco.com\/?p=4882"},"modified":"2023-12-12T17:46:37","modified_gmt":"2023-12-12T17:46:37","slug":"monitor-temperature-in-ultra-low-freezer-applications","status":"publish","type":"post","link":"https:\/\/www.minco.com\/monitor-temperature-in-ultra-low-freezer-applications\/","title":{"rendered":"Monitor Temperature in Ultra-Low Freezer Applications"},"content":{"rendered":"<p><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-4883 size-medium alignright\" src=\"https:\/\/www.minco.com\/wp-content\/uploads\/vial-photo-300x224.png\" alt=\"\" width=\"300\" height=\"224\" srcset=\"https:\/\/www.minco.com\/wp-content\/uploads\/vial-photo-300x224.png 300w, https:\/\/www.minco.com\/wp-content\/uploads\/vial-photo.png 525w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><em>By Darrell Hyde<\/em><\/p>\n<p>Reliable cold storage of vaccines, tissue and plasma samples is regularly required in a variety of medical and pharmaceutical applications. Temperature measurement in applications as low as -120\u00b0F presents challenges on multiple fronts. With Minco\u2019s extensive experience using our wire-wound platinum RTD (resistance temperature detector) technology, paired with 4-20mA transmitters for simple and reliable signal transmittal, the following challenges of low temperature measurement can be overcome.<\/p>\n<p>Many temperature sensors simply are not rated for temperatures below -50\u00b0F. This is especially true of thin-film RTDs which lose accuracy and reliability at low temperatures due to thermal expansion issues \u2013 or in this case thermal contraction issues \u2013 where the rigidly bonded thin-film materials (ceramic, platinum, glass, lead wires) contract at different rates, causing strains on the sensing element. At best, these strains produce errors in the sensor output. At worst, the strains can cause cracks or breaks, leading to element failure of the sensing element. Our wire-wound RTDs are constructed to avoid this strain issue which makes them suitable at much lower temperatures \u2013 in some cases, as low as -452\u00b0F.<\/p>\n<p>Not surprisingly, temperature sensors indicate their temperature, not the temperature of the contents of a freezer or refrigerator. This is fine if you never open the freezer door but that is not very practical! When you do open the door, warmer air enters the freezer and will likely cause the sensor to indicate a temperature that is warmer than the actual freezer contents \u2014 which have a larger mass than the warmer air that just entered. Our Thermal-Vial assemblies solve this problem by enclosing the temperature sensor in a vial containing a liquid with a low freezing point. Being in the vial will slow down the rate of change of the temperature sensor to more accurately match that of the contents. After all, you want to know the temperature of the contents \u2013 not the air in the freezer. Moreover, you definitely don\u2019t want to have a false alarm triggered by the temperature sensor measuring a short blast of warm air instead of the freezer\u2019s contents.<\/p>\n<p>A third challenge is getting the sensor signal to the control system or recording device. This can be done wirelessly but that introduces risks of transmitter failure as well as signal loss. Minco utilizes a 4-20mA transmitter wired directly to the sensor and located on the outside of the freezer or refrigerator. The 4-20mA signal is sent by a simple two-wire configuration to the control system. This current (mA) signal is immune to long wire runs, which could adversely affect accuracy of the sensor through added circuit resistance or electrical noise. An optional local display is available if a visual indication of temperature is desired at the freezer itself.<\/p>\n<p>See <a href=\"https:\/\/www.minco.com\/wp-content\/uploads\/Thermal-Vial-sell-sheet-v4.pdf\">Minco Thermal Vial<\/a> for additional information.<\/p>\n<p>An alternative design capable of even lower temperature measurement \u2013 as low as -452\u00b0F is our Refrigeration and Freezer Temperature Sensor which utilizes the same wire wound RTD and 4-20mA transmitter.\u00a0 See <a href=\"https:\/\/www.minco.com\/wp-content\/uploads\/Minco-Temperature-Sensors-and-Instruments-Product-Guide-J.pdf#page=144\">Minco Refrigeration and Freezer Temperature System<\/a> for more information.<\/p>\n<p>Contact your Minco Sales team for assistance with these standard products, a custom configuration or any temperature sensing need.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Temperature measurement in applications as low as -120\u00b0F presents challenges on multiple fronts. With Minco\u2019s extensive experience using our wire-wound platinum RTD (resistance temperature detector) technology, paired with 4-20mA transmitters for simple and reliable signal transmittal, the following challenges of low temperature measurement can be overcome.<\/p>\n","protected":false},"author":3,"featured_media":4883,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[26],"tags":[],"class_list":["post-4882","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-temperature-sensors"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Monitor Temperature in Ultra-Low Freezer Applications - Minco<\/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:\/\/www.minco.com\/monitor-temperature-in-ultra-low-freezer-applications\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Monitor Temperature in Ultra-Low Freezer Applications - Minco\" \/>\n<meta property=\"og:description\" content=\"Temperature measurement in applications as low as -120\u00b0F presents challenges on multiple fronts. With Minco\u2019s extensive experience using our wire-wound platinum RTD (resistance temperature detector) technology, paired with 4-20mA transmitters for simple and reliable signal transmittal, the following challenges of low temperature measurement can be overcome.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.minco.com\/monitor-temperature-in-ultra-low-freezer-applications\/\" \/>\n<meta property=\"og:site_name\" content=\"Minco\" \/>\n<meta property=\"article:published_time\" content=\"2021-03-11T20:15:53+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-12-12T17:46:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.minco.com\/wp-content\/uploads\/vial-photo.png\" \/>\n\t<meta property=\"og:image:width\" content=\"525\" \/>\n\t<meta property=\"og:image:height\" content=\"392\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Dakota R\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dakota R\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.minco.com\\\/monitor-temperature-in-ultra-low-freezer-applications\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.minco.com\\\/monitor-temperature-in-ultra-low-freezer-applications\\\/\"},\"author\":{\"name\":\"Dakota R\",\"@id\":\"https:\\\/\\\/www.minco.com\\\/#\\\/schema\\\/person\\\/4143e3efd7a661f3f8f4c87ad929cb93\"},\"headline\":\"Monitor Temperature in Ultra-Low Freezer Applications\",\"datePublished\":\"2021-03-11T20:15:53+00:00\",\"dateModified\":\"2023-12-12T17:46:37+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.minco.com\\\/monitor-temperature-in-ultra-low-freezer-applications\\\/\"},\"wordCount\":536,\"publisher\":{\"@id\":\"https:\\\/\\\/www.minco.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.minco.com\\\/monitor-temperature-in-ultra-low-freezer-applications\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.minco.com\\\/wp-content\\\/uploads\\\/vial-photo.png\",\"articleSection\":[\"Temperature Sensors\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.minco.com\\\/monitor-temperature-in-ultra-low-freezer-applications\\\/\",\"url\":\"https:\\\/\\\/www.minco.com\\\/monitor-temperature-in-ultra-low-freezer-applications\\\/\",\"name\":\"Monitor Temperature in Ultra-Low Freezer Applications - 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