{"id":3226,"date":"2023-05-02T06:46:24","date_gmt":"2023-05-02T06:46:24","guid":{"rendered":"https:\/\/thermibel.be\/faq\/what-are-the-various-fixed-points\/"},"modified":"2023-06-23T14:54:55","modified_gmt":"2023-06-23T14:54:55","slug":"what-are-the-various-fixed-points","status":"publish","type":"faq","link":"https:\/\/thermibel.be\/en\/faq\/what-are-the-various-fixed-points\/","title":{"rendered":"What are the various fixed points?"},"content":{"rendered":"\n

The ITS (International Temperature Scale) uses 17 temperature reference points<\/strong>:<\/p>\n\n

Element<\/strong><\/td>Symbol<\/strong><\/td>Type<\/strong><\/td>K<\/strong><\/td>\u00b0C<\/strong><\/td><\/tr>
Helium<\/strong><\/td>He<\/td>Vapour pressure<\/td>5<\/td>-268.15<\/td><\/tr>
Hydrogen<\/strong><\/td>H2<\/sub><\/td>Triple point<\/td>13.8033<\/td>-259.3467<\/td><\/tr>
Hydrogen<\/strong><\/td>H2<\/sub><\/td>Vapour pressure<\/td>17<\/td>-256.15<\/td><\/tr>
Hydrogen<\/strong><\/td>H2<\/sub><\/td>Vapour pressure<\/td>20.3<\/td>-252.85<\/td><\/tr>
Neon<\/strong><\/td>Ne<\/td>Triple point<\/td>24.5561<\/td>-248.5939<\/td><\/tr>
Oxygen<\/strong><\/td>O2<\/sub><\/td>Triple point<\/td>54.3584<\/td>-218.7916<\/td><\/tr>
Argon<\/strong><\/td>Ar<\/td>Triple point<\/td>83.8058<\/td>-189.3442<\/td><\/tr>
Mercury<\/strong><\/td>Hg<\/td>Triple point<\/td>234.315<\/td>-38.8344<\/td><\/tr>
Water<\/strong><\/td>H2<\/sub>O<\/td>Triple point<\/td>273.16<\/td>0.01<\/td><\/tr>
Gallium<\/strong><\/td>Ga<\/td>Melting<\/td>302.9146<\/td>29.7646<\/td><\/tr>
Indium<\/strong><\/td>In<\/td>Freezing<\/td>429.7485<\/td>156.5985<\/td><\/tr>
Tin<\/strong><\/td>Sn<\/td>Freezing<\/td>505.078<\/td>231.928<\/td><\/tr>
Zinc<\/strong><\/td>Zn<\/td>Freezing<\/td>692.677<\/td>419.527<\/td><\/tr>
Aluminium<\/strong><\/td>Al<\/td>Solidification<\/td>933.473<\/td>660.323<\/td><\/tr>
Silver<\/strong><\/td>Ag<\/td>Freezing<\/td>1234.93<\/td>961.78<\/td><\/tr>
Gold<\/strong><\/td>Au<\/td>Freezing<\/td>1337.33<\/td>1064.18<\/td><\/tr>
Copper<\/strong><\/td>Cu<\/td>Freezing<\/td>1357.77<\/td>1084.62<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"featured_media":0,"template":"","format":"standard","class_list":["post-3226","faq","type-faq","status-publish","format-standard","hentry"],"acf":[],"aioseo_notices":[],"yoast_head":"\nWhat are the various fixed points? - Thermibel<\/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:\/\/thermibel.be\/en\/faq\/what-are-the-various-fixed-points\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What are the various fixed points? - Thermibel\" \/>\n<meta property=\"og:description\" content=\"The ITS (International Temperature Scale) uses 17 temperature reference points: Element Symbol Type K \u00b0C Helium He Vapour pressure 5 -268.15 Hydrogen H2 Triple point 13.8033 -259.3467 Hydrogen H2 Vapour pressure 17 -256.15 Hydrogen H2 Vapour pressure 20.3 -252.85 Neon Ne Triple point 24.5561 -248.5939 Oxygen O2 Triple point 54.3584 -218.7916 Argon Ar Triple point […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/thermibel.be\/en\/faq\/what-are-the-various-fixed-points\/\" \/>\n<meta property=\"og:site_name\" content=\"Thermibel\" \/>\n<meta property=\"article:modified_time\" content=\"2023-06-23T14:54:55+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/thermibel.be\\\/en\\\/faq\\\/what-are-the-various-fixed-points\\\/\",\"url\":\"https:\\\/\\\/thermibel.be\\\/en\\\/faq\\\/what-are-the-various-fixed-points\\\/\",\"name\":\"What are the various fixed points? 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