{"id":4310,"date":"2023-09-16T21:44:00","date_gmt":"2023-09-16T13:44:00","guid":{"rendered":"https:\/\/www.sj-gauge.com\/?p=4310"},"modified":"2026-04-20T23:16:20","modified_gmt":"2026-04-20T15:16:20","slug":"temperature-sensor-thermocouple-rtd-selection","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/vi\/temperature-sensor-thermocouple-rtd-selection\/","title":{"rendered":"\u0110\u1ea7u d\u00f2 nhi\u1ec7t \u0111\u1ed9 l\u00e0 g\u00ec? S\u1ef1 kh\u00e1c bi\u1ec7t trong c\u00e1ch n\u1ed1i d\u00e2y gi\u1eefa c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n v\u00e0 RTD l\u00e0 g\u00ec? L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 l\u1ef1a ch\u1ecdn gi\u1eefa c\u00e1c lo\u1ea1i K, N, S, E v\u00e0 J?"},"content":{"rendered":"<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>Th\u00f4ng th\u01b0\u1eddng, ng\u01b0\u1eddi ta hay g\u1ecdi c\u1ea3 c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n v\u00e0 c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9 \u0111i\u1ec7n tr\u1edf (RTD) l\u00e0 c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9, nh\u01b0ng tr\u00ean th\u1ef1c t\u1ebf, \u0111\u00e2y l\u00e0 hai thi\u1ebft b\u1ecb kh\u00e1c nhau. Trang n\u00e0y ch\u1ee7 y\u1ebfu \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c lo\u1ea1i c\u00e1ch \u0111\u1ea5u d\u00e2y c\u1ee7a c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n, ch\u1ee9 kh\u00f4ng ph\u1ea3i RTD. N\u1ebfu \u0111i\u1ec1u n\u00e0y g\u00e2y ra b\u1ea5t k\u1ef3 s\u1ef1 hi\u1ec3u l\u1ea7m n\u00e0o, ch\u00fang t\u00f4i xin l\u1ed7i.<\/p>\n\n\n\n<p>C\u1eb7p nhi\u1ec7t \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1edd d\u1ea3i \u0111o r\u1ed9ng v\u00e0 t\u00ednh linh ho\u1ea1t cao. Quan tr\u1ecdng h\u01a1n, ch\u00fang c\u00f3 gi\u00e1 th\u00e0nh t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p (\u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i kh\u00f4ng ch\u1ee9a kim lo\u1ea1i qu\u00fd), khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh m\u1ed9t trong nh\u1eefng thi\u1ebft b\u1ecb \u0111o nhi\u1ec7t \u0111\u1ed9 ph\u1ed5 bi\u1ebfn nh\u1ea5t. Ng\u00e0y nay, c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n c\u00f3 nhi\u1ec1u lo\u1ea1i k\u1ebft n\u1ed1i kh\u00e1c nhau. V\u00ec m\u1ed7i lo\u1ea1i t\u1ea1o ra t\u00edn hi\u1ec7u \u0111\u1ea7u ra kh\u00e1c nhau, n\u00ean khi l\u1eafp \u0111\u1eb7t, c\u1ea7n ph\u1ea3i xem x\u00e9t lo\u1ea1i c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n m\u00e0 thi\u1ebft b\u1ecb g\u1ed1c s\u1eed d\u1ee5ng. Khi thi\u1ebft k\u1ebf thi\u1ebft b\u1ecb, n\u00ean ch\u1ecdn lo\u1ea1i n\u00e0o cho ph\u00f9 h\u1ee3p? D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng t\u00f3m t\u1eaft c\u00e1c lo\u1ea1i k\u1ebft n\u1ed1i c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n kh\u00e1c nhau \u0111\u1ec3 b\u1ea1n tham kh\u1ea3o.<\/p>\n<\/blockquote>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">M\u1ee5c l\u1ee5c<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"B\u1eadt\/t\u1eaft M\u1ee5c l\u1ee5c\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">B\u1eadt\/T\u1eaft<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #7b1e1c;color:#7b1e1c\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #7b1e1c;color:#7b1e1c\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.sj-gauge.com\/vi\/temperature-sensor-thermocouple-rtd-selection\/#1-k-type-type-k-nickel-chromium-nickel-aluminum-alloy\" >1. Lo\u1ea1i K (Lo\u1ea1i K, h\u1ee3p kim niken-crom \/ niken-nh\u00f4m)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.sj-gauge.com\/vi\/temperature-sensor-thermocouple-rtd-selection\/#2-e-type-type-e-nickel-chromium-copper-nickel-alloy\" >2. Lo\u1ea1i E (Lo\u1ea1i E, h\u1ee3p kim niken-crom \/ \u0111\u1ed3ng-niken)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.sj-gauge.com\/vi\/temperature-sensor-thermocouple-rtd-selection\/#3-j-type-type-j-iron-copper-nickel-alloy\" >3. Lo\u1ea1i J (Lo\u1ea1i J, S\u1eaft \/ H\u1ee3p kim \u0111\u1ed3ng-niken)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.sj-gauge.com\/vi\/temperature-sensor-thermocouple-rtd-selection\/#4-n-type-type-n-nickel-chromium-silicon-nickel-silicon-alloy\" >4. Lo\u1ea1i N (Lo\u1ea1i N, h\u1ee3p kim niken-crom-silic \/ h\u1ee3p kim niken-silic)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.sj-gauge.com\/vi\/temperature-sensor-thermocouple-rtd-selection\/#5-t-type-type-t-copper-copper-nickel-alloy\" >5. Lo\u1ea1i T (Lo\u1ea1i T, \u0110\u1ed3ng \/ H\u1ee3p kim \u0111\u1ed3ng-niken)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.sj-gauge.com\/vi\/temperature-sensor-thermocouple-rtd-selection\/#6-b-r-s-types-noble-metal-thermocouples-platinum-platinum-rhodium-alloys\" >6. Lo\u1ea1i B, R, S (C\u1eb7p nhi\u1ec7t \u0111i\u1ec7n kim lo\u1ea1i qu\u00fd, h\u1ee3p kim b\u1ea1ch kim \/ b\u1ea1ch kim-rhodium)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.sj-gauge.com\/vi\/temperature-sensor-thermocouple-rtd-selection\/#7-thermocouple-output-signal-comparison-table\" >7. B\u1ea3ng so s\u00e1nh t\u00edn hi\u1ec7u \u0111\u1ea7u ra c\u1ee7a c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-9129565736698ec0fe7e02aba6dbcc5f\" id=\"h-1-k-type-type-k-nickel-chromium-nickel-aluminum-alloy\"><span class=\"ez-toc-section\" id=\"1-k-type-type-k-nickel-chromium-nickel-aluminum-alloy\"><\/span>1. Lo\u1ea1i K (Lo\u1ea1i K, h\u1ee3p kim niken-crom \/ niken-nh\u00f4m)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Lo\u1ea1i K l\u00e0 lo\u1ea1i c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t nh\u1edd chi ph\u00ed th\u1ea5p v\u00e0 d\u1ea3i \u0111o r\u1ed9ng (t\u1eeb -200\u00b0C \u0111\u1ebfn +1000\u00b0C). Lo\u1ea1i n\u00e0y c\u00f3 \u0111\u1ed9 nh\u1ea1y kho\u1ea3ng 41 \u03bcV\/\u00b0C, gi\u00fap d\u1ec5 d\u00e0ng ph\u00e1t hi\u1ec7n v\u00e0 kh\u00f4ng g\u00e2y t\u1ea3i qu\u00e1 m\u1ee9c cho h\u1ec7 th\u1ed1ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao. N\u00f3i chung, tr\u1eeb khi c\u00f3 y\u00eau c\u1ea7u \u0111\u1eb7c bi\u1ec7t, lo\u1ea1i K l\u00e0 l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean.<br><br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1000\" height=\"617\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/01_SJ-Gauge_Thermocouple_K-type.jpg\" alt=\"\" class=\"wp-image-4311\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/01_SJ-Gauge_Thermocouple_K-type.jpg 1000w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/01_SJ-Gauge_Thermocouple_K-type-300x185.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/01_SJ-Gauge_Thermocouple_K-type-768x474.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/01_SJ-Gauge_Thermocouple_K-type-18x12.jpg 18w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/01_SJ-Gauge_Thermocouple_K-type-600x370.jpg 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-b81bfbd1f502fe23c13b82f107ec29e0\" id=\"h-2-e-type-type-e-nickel-chromium-copper-nickel-alloy\"><span class=\"ez-toc-section\" id=\"2-e-type-type-e-nickel-chromium-copper-nickel-alloy\"><\/span>2. Lo\u1ea1i E (Lo\u1ea1i E, h\u1ee3p kim niken-crom \/ \u0111\u1ed3ng-niken)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Lo\u1ea1i E c\u00f3 \u0111\u1ed9 nh\u1ea1y t\u01b0\u01a1ng \u0111\u1ed1i cao (68 \u03bcV\/\u00b0C), n\u00ean r\u1ea5t th\u00edch h\u1ee3p \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. Lo\u1ea1i n\u00e0y c\u00f3 th\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 g\u1ea7n \u0111i\u1ec3m kh\u00f4ng tuy\u1ec7t \u0111\u1ed1i v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 t\u1eeb -200\u00b0C \u0111\u1ebfn 900\u00b0C. Ngo\u00e0i ra, do c\u1ea3 hai c\u1ef1c \u0111\u1ec1u kh\u00f4ng t\u1eeb t\u00ednh, n\u00ean kh\u00f4ng th\u1ec3 d\u00f9ng nam ch\u00e2m \u0111\u1ec3 ph\u00e2n bi\u1ec7t c\u1ef1c d\u01b0\u01a1ng v\u00e0 c\u1ef1c \u00e2m.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"759\" height=\"634\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/02_SJ-Gauge_Thermocouple_E-type.jpg\" alt=\"\" class=\"wp-image-4312\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/02_SJ-Gauge_Thermocouple_E-type.jpg 759w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/02_SJ-Gauge_Thermocouple_E-type-300x251.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/02_SJ-Gauge_Thermocouple_E-type-14x12.jpg 14w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/02_SJ-Gauge_Thermocouple_E-type-600x501.jpg 600w\" sizes=\"(max-width: 759px) 100vw, 759px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color\" id=\"h-3-j-type-type-j-iron-copper-nickel-alloy\"><span class=\"ez-toc-section\" id=\"3-j-type-type-j-iron-copper-nickel-alloy\"><\/span>3. Lo\u1ea1i J (Lo\u1ea1i J, S\u1eaft \/ H\u1ee3p kim \u0111\u1ed3ng-niken)<br><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Lo\u1ea1i J l\u00e0 m\u1ed9t lo\u1ea1i c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n th\u1ebf h\u1ec7 c\u0169 v\u00e0 hi\u1ec7n nay \u00edt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng h\u01a1n. Lo\u1ea1i n\u00e0y ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong c\u00e1c thi\u1ebft b\u1ecb c\u0169 kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c t\u00edn hi\u1ec7u c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n kh\u00e1c. Do d\u1ea3i \u0111o h\u1ea1n ch\u1ebf (-40 \u0111\u1ebfn +750\u00b0C), lo\u1ea1i n\u00e0y ph\u1ea7n l\u1edbn \u0111\u00e3 \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng lo\u1ea1i K. \u0110\u1ed9 nh\u1ea1y c\u1ee7a n\u00f3 l\u00e0 kho\u1ea3ng 52 \u03bcV\/\u00b0C. Kh\u00f4ng n\u00ean s\u1eed d\u1ee5ng lo\u1ea1i J \u1edf nhi\u1ec7t \u0111\u1ed9 tr\u00ean 760\u00b0C, v\u00ec t\u00ednh ch\u1ea5t t\u1eeb t\u00ednh c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t, d\u1eabn \u0111\u1ebfn m\u1ea5t \u0111\u1ed9 ch\u00ednh x\u00e1c v\u0129nh vi\u1ec5n.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"767\" height=\"634\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/03_SJ-Gauge_Thermocouple_J-type.jpg\" alt=\"\" class=\"wp-image-4313\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/03_SJ-Gauge_Thermocouple_J-type.jpg 767w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/03_SJ-Gauge_Thermocouple_J-type-300x248.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/03_SJ-Gauge_Thermocouple_J-type-15x12.jpg 15w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/03_SJ-Gauge_Thermocouple_J-type-600x496.jpg 600w\" sizes=\"(max-width: 767px) 100vw, 767px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-77938e19c700ac394a3e3939fbe2dd26\" id=\"h-4-n-type-type-n-nickel-chromium-silicon-nickel-silicon-alloy\"><span class=\"ez-toc-section\" id=\"4-n-type-type-n-nickel-chromium-silicon-nickel-silicon-alloy\"><\/span>4. Lo\u1ea1i N (Lo\u1ea1i N, h\u1ee3p kim niken-crom-silic \/ h\u1ee3p kim niken-silic)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Lo\u1ea1i N mang l\u1ea1i \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh cao v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a tuy\u1ec7t v\u1eddi \u1edf nhi\u1ec7t \u0111\u1ed9 cao, khi\u1ebfn n\u00f3 ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao. \u0110\u1ed9 nh\u1ea1y c\u1ee7a n\u00f3 v\u00e0o kho\u1ea3ng 39 \u03bcV\/\u00b0C, v\u00e0 n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 phi\u00ean b\u1ea3n n\u00e2ng c\u1ea5p c\u1ee7a Lo\u1ea1i K. Gi\u1ed1ng nh\u01b0 Lo\u1ea1i K, n\u00f3 kh\u00f4ng ch\u1ee9a kim lo\u1ea1i qu\u00fd, \u0111i\u1ec1u n\u00e0y \u0111\u00e3 g\u00f3p ph\u1ea7n l\u00e0m t\u0103ng s\u1ef1 ph\u1ed5 bi\u1ebfn c\u1ee7a n\u00f3. Ph\u1ea1m vi \u0111o t\u1eeb -200\u00b0C \u0111\u1ebfn +1200\u00b0C.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"759\" height=\"634\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/04_SJ-Gauge_Thermocouple_N-type.jpg\" alt=\"\" class=\"wp-image-4314\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/04_SJ-Gauge_Thermocouple_N-type.jpg 759w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/04_SJ-Gauge_Thermocouple_N-type-300x251.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/04_SJ-Gauge_Thermocouple_N-type-14x12.jpg 14w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/04_SJ-Gauge_Thermocouple_N-type-600x501.jpg 600w\" sizes=\"(max-width: 759px) 100vw, 759px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-838e17eabbb42756791dda242b77d561\" id=\"h-5-t-type-type-t-copper-copper-nickel-alloy\"><span class=\"ez-toc-section\" id=\"5-t-type-type-t-copper-copper-nickel-alloy\"><\/span>5. Lo\u1ea1i T (Lo\u1ea1i T, \u0110\u1ed3ng \/ H\u1ee3p kim \u0111\u1ed3ng-niken)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Lo\u1ea1i T l\u00e0 lo\u1ea1i ph\u00f9 h\u1ee3p nh\u1ea5t \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, v\u1edbi \u0111\u1ed9 nh\u1ea1y kho\u1ea3ng 43 \u03bcV\/\u00b0C. Lo\u1ea1i n\u00e0y c\u00f3 \u0111\u1ed9 nh\u1ea1y cao, ph\u1ea3n \u1ee9ng nhi\u1ec7t \u0111\u1ed9 g\u1ea7n nh\u01b0 tuy\u1ebfn t\u00ednh, \u0111\u1ed9 l\u1eb7p l\u1ea1i t\u1ed1t, \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh l\u00e2u d\u00e0i tuy\u1ec7t v\u1eddi v\u00e0 chi ph\u00ed th\u1ea5p. Tuy nhi\u00ean, ch\u00e2n d\u01b0\u01a1ng b\u1eb1ng \u0111\u1ed3ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a k\u00e9m \u1edf nhi\u1ec7t \u0111\u1ed9 cao, \u0111i\u1ec1u n\u00e0y h\u1ea1n ch\u1ebf nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a c\u1ee7a n\u00f3. Khi nhi\u1ec7t \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 400\u00b0C, ch\u00e2n d\u01b0\u01a1ng d\u1ec5 b\u1ecb oxy h\u00f3a v\u00e0 h\u01b0 h\u1ecfng. Ph\u1ea1m vi \u0111o t\u1eeb -250\u00b0C \u0111\u1ebfn +350\u00b0C.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"759\" height=\"634\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/05_SJ-Gauge_Thermocouple_T-type.jpg\" alt=\"\" class=\"wp-image-4315\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/05_SJ-Gauge_Thermocouple_T-type.jpg 759w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/05_SJ-Gauge_Thermocouple_T-type-300x251.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/05_SJ-Gauge_Thermocouple_T-type-14x12.jpg 14w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/05_SJ-Gauge_Thermocouple_T-type-600x501.jpg 600w\" sizes=\"(max-width: 759px) 100vw, 759px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-ec5cb4dbcb17fb8ef21df14f35b5a72c\" id=\"h-6-b-r-s-types-noble-metal-thermocouples-platinum-platinum-rhodium-alloys\"><span class=\"ez-toc-section\" id=\"6-b-r-s-types-noble-metal-thermocouples-platinum-platinum-rhodium-alloys\"><\/span>6. Lo\u1ea1i B, R, S (C\u1eb7p nhi\u1ec7t \u0111i\u1ec7n kim lo\u1ea1i qu\u00fd, h\u1ee3p kim b\u1ea1ch kim \/ b\u1ea1ch kim-rhodium)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Ba lo\u1ea1i n\u00e0y kh\u00e1 gi\u1ed1ng nhau v\u00e0 \u0111\u1ec1u ph\u00f9 h\u1ee3p \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 cao v\u1edbi \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh tuy\u1ec7t v\u1eddi. Tuy nhi\u00ean, do gi\u00e1 th\u00e0nh cao n\u00ean ch\u00fang kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i. Lo\u1ea1i S c\u00f3 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh, t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i v\u00e0 \u0111\u1ed9 nh\u1ea1y cao nh\u1ea5t trong ba lo\u1ea1i, v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0m c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n chu\u1ea9n \u0111\u1ec3 hi\u1ec7u chu\u1ea9n. Lo\u1ea1i n\u00e0y c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng li\u00ean t\u1ee5c \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00ean \u0111\u1ebfn 1300\u00b0C v\u00e0 l\u00ean \u0111\u1ebfn 1600\u00b0C trong th\u1eddi gian ng\u1eafn. Lo\u1ea1i B t\u01b0\u01a1ng \u0111\u1ed1i b\u1ec1n h\u01a1n, nh\u01b0ng do \u0111\u1eb7c t\u00ednh nhi\u1ec7t \u0111\u1ed9-\u0111i\u1ec7n \u00e1p c\u1ee7a n\u00f3, lo\u1ea1i n\u00e0y \u00edt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng h\u01a1n. Lo\u1ea1i R t\u01b0\u01a1ng t\u1ef1 nh\u01b0 lo\u1ea1i S v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n. Tuy nhi\u00ean, lo\u1ea1i n\u00e0y \u0111\u1eaft h\u01a1n v\u00e0 y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 b\u1ed5 sung nh\u01b0 \u1ed1ng b\u1ea3o v\u1ec7, v\u00ec v\u1eady n\u00f3 c\u0169ng kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"759\" height=\"634\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/06_SJ-Gauge_Thermocouple_BRS-type.jpg\" alt=\"\" class=\"wp-image-4316\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/06_SJ-Gauge_Thermocouple_BRS-type.jpg 759w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/06_SJ-Gauge_Thermocouple_BRS-type-300x251.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/06_SJ-Gauge_Thermocouple_BRS-type-14x12.jpg 14w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/06_SJ-Gauge_Thermocouple_BRS-type-600x501.jpg 600w\" sizes=\"(max-width: 759px) 100vw, 759px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-60ae968fd36f8a93d0130e6f74ef7cd6\" id=\"h-7-thermocouple-output-signal-comparison-table\"><span class=\"ez-toc-section\" id=\"7-thermocouple-output-signal-comparison-table\"><\/span>7. B\u1ea3ng so s\u00e1nh t\u00edn hi\u1ec7u \u0111\u1ea7u ra c\u1ee7a c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u0110\u1ec3 gi\u00fap qu\u00fd v\u1ecb so s\u00e1nh s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 t\u00edn hi\u1ec7u \u0111\u1ea7u ra gi\u1eefa c\u00e1c lo\u1ea1i c\u1eb7p nhi\u1ec7t \u0111i\u1ec7n kh\u00e1c nhau, ch\u00fang t\u00f4i \u0111\u00e3 t\u1ed5ng h\u1ee3p th\u00f4ng tin trong b\u1ea3ng b\u00ean ph\u1ea3i.<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"615\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/07_SJ-Gauge_Thermocouple_all-type.jpg\" alt=\"\" class=\"wp-image-4317\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/07_SJ-Gauge_Thermocouple_all-type.jpg 1000w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/07_SJ-Gauge_Thermocouple_all-type-300x185.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/07_SJ-Gauge_Thermocouple_all-type-768x472.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/07_SJ-Gauge_Thermocouple_all-type-18x12.jpg 18w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/07_SJ-Gauge_Thermocouple_all-type-600x369.jpg 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>","protected":false},"excerpt":{"rendered":"<p>It is common practice to refer to both thermocouples and resistance temperature detectors (RTDs) as temperature sensors, but in fact they are two different things. This page mainly discusses thermocouple wiring types, not RTDs. If this causes any misunderstanding, we apologize. Thermocouples are widely used because of their broad measurement range and versatility. More importantly, [&hellip;]<\/p>","protected":false},"author":2,"featured_media":4318,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[72],"class_list":["post-4310","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-temperature"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.7 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What Is a Temperature Probe? Thermocouple vs RTD &amp; Types K, N, S, E, J Explained\uff5cSJ Gauge<\/title>\n<meta name=\"description\" content=\"A temperature probe includes thermocouples and RTDs, but they differ in wiring, accuracy, and applications. Learn the key differences and how to choose thermocouple types K, N, S, E, and J for your system.\" \/>\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.sj-gauge.com\/vi\/temperature-sensor-thermocouple-rtd-selection\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is a temperature probe? What are the differences in wiring between thermocouples and RTDs? How should you choose among K, N, S, E, and J types?\" \/>\n<meta property=\"og:description\" content=\"A temperature probe includes thermocouples and RTDs, but they differ in wiring, accuracy, and applications. Learn the key differences and how to choose thermocouple types K, N, S, E, and J for your system.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sj-gauge.com\/vi\/temperature-sensor-thermocouple-rtd-selection\/\" \/>\n<meta property=\"og:site_name\" content=\"Your Expert in Pressure Temp and Smart Transmitters - SJ Gauge\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-16T13:44:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-20T15:16:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2026\/04\/3-03_BN.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"500\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"SJ Gauge\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"SJ Gauge\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/temperature-sensor-thermocouple-rtd-selection\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/temperature-sensor-thermocouple-rtd-selection\\\/\"},\"author\":{\"name\":\"SJ Gauge\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/#\\\/schema\\\/person\\\/cbc9e642e49a53b18b3eb832486bd52c\"},\"headline\":\"What is a temperature probe? 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