{"id":2378,"date":"2025-12-08T13:25:05","date_gmt":"2025-12-08T05:25:05","guid":{"rendered":"https:\/\/sj-gauge.com\/?p=2378"},"modified":"2026-06-01T12:09:43","modified_gmt":"2026-06-01T04:09:43","slug":"industrial-thermometers-types","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/vi\/industrial-thermometers-types\/","title":{"rendered":"C\u00e1c lo\u1ea1i nhi\u1ec7t k\u1ebf c\u00f4ng nghi\u1ec7p v\u00e0 c\u00e1ch l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p"},"content":{"rendered":"<p>Nhi\u1ec7t k\u1ebf c\u00f4ng nghi\u1ec7p c\u00f3 nhi\u1ec1u nguy\u00ean l\u00fd \u0111o v\u00e0 ph\u1ea1m vi \u1ee9ng d\u1ee5ng kh\u00e1c nhau. B\u00e0i vi\u1ebft gi\u1edbi thi\u1ec7u n\u0103m nh\u00f3m ph\u1ed5 bi\u1ebfn, \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n c\u00e2n nh\u1eafc khi l\u1ef1a ch\u1ecdn.<\/p>\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\/industrial-thermometers-types\/#1glass-thermometer\" >1. Nhi\u1ec7t k\u1ebf th\u1ee7y tinh<\/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\/industrial-thermometers-types\/#2-bimetal-thermometer\" >2. Nhi\u1ec7t k\u1ebf l\u01b0\u1ee1ng kim<\/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\/industrial-thermometers-types\/#3-gas-expansion-thermometer\" >3. Nhi\u1ec7t k\u1ebf gi\u00e3n n\u1edf kh\u00ed<\/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\/industrial-thermometers-types\/#4-thermocouple-thermometer\" >4. C\u1eb7p nhi\u1ec7t \u0111i\u1ec7n<\/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\/industrial-thermometers-types\/#5-resistance-thermometer-rtd\" >5. C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n tr\u1edf (RTD)<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-d47620cf34562f722794e1c8db292ff0\" id=\"h-1-glass-thermometer\"><span class=\"ez-toc-section\" id=\"1glass-thermometer\"><\/span>1. Nhi\u1ec7t k\u1ebf th\u1ee7y tinh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Nhi\u1ec7t k\u1ebf th\u1ee7y tinh c\u00f3 k\u1ebft c\u1ea5u \u0111\u01a1n gi\u1ea3n v\u00e0 chi ph\u00ed th\u1ea5p, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u00f2ng th\u00ed nghi\u1ec7m v\u00e0 m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p. Tuy nhi\u00ean, \u1ed1ng th\u1ee7y tinh d\u1ec5 v\u1ee1 v\u00e0 ph\u1ea3i \u0111\u1ecdc \u0111\u00fang g\u00f3c nh\u00ecn \u0111\u1ec3 h\u1ea1n ch\u1ebf sai s\u1ed1 th\u1ecb sai. Thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c ph\u00e9p \u0111o h\u00f3a h\u1ecdc v\u00e0 \u1ee9ng d\u1ee5ng kh\u00f4ng c\u00f3 rung \u0111\u1ed9ng m\u1ea1nh; d\u1ea3i nhi\u1ec7t \u0111i\u1ec3n h\u00ecnh kho\u1ea3ng -60\u00b0C \u0111\u1ebfn 200\u00b0C.<\/p>\n\n\n\n<p><strong>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large is-resized is-style-rounded\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"853\" data-id=\"2590\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-glass-tube-1-1024x853.jpg\" alt=\"\" class=\"wp-image-2590\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-glass-tube-1-1024x853.jpg 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-glass-tube-1-300x250.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-glass-tube-1-768x640.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-glass-tube-1-600x500.jpg 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-glass-tube-1.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong><a href=\"https:\/\/www.sj-gauge.com\/vi\/san-pham\/det\/\">Nhi\u1ec7t k\u1ebf \u1ed1ng th\u1ee7y tinh<\/a><\/strong><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized is-style-rounded\"><img decoding=\"async\" width=\"1024\" height=\"853\" data-id=\"2598\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_V-line_glass_alcohol_thermometer_with_rotatable_casing_L-1024x853.jpg\" alt=\"\" class=\"wp-image-2598\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_V-line_glass_alcohol_thermometer_with_rotatable_casing_L-1024x853.jpg 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_V-line_glass_alcohol_thermometer_with_rotatable_casing_L-300x250.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_V-line_glass_alcohol_thermometer_with_rotatable_casing_L-768x640.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_V-line_glass_alcohol_thermometer_with_rotatable_casing_L-600x500.jpg 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_V-line_glass_alcohol_thermometer_with_rotatable_casing_L.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong><a href=\"https:\/\/www.sj-gauge.com\/vi\/san-pham\/glt\/\" type=\"link\" id=\"https:\/\/www.sj-gauge.com\/product\/glt\/\">Nhi\u1ec7t k\u1ebf c\u00f4ng nghi\u1ec7p 9 inch<\/a><\/strong><\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p>Ch\u1ea5t l\u1ecfng \u0111o \u0111\u01b0\u1ee3c ch\u1ee9a trong b\u1ea7u v\u00e0 \u1ed1ng mao d\u1eabn th\u1ee7y tinh. Khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i, ch\u1ea5t l\u1ecfng gi\u00e3n n\u1edf ho\u1eb7c co l\u1ea1i, l\u00e0m c\u1ed9t ch\u1ea5t l\u1ecfng d\u1ecbch chuy\u1ec3n theo thang chia \u0111\u1ec3 hi\u1ec3n th\u1ecb nhi\u1ec7t \u0111\u1ed9.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-8a5273f4d24087126c0386a8fae58543\" id=\"h-2-bimetal-thermometer\"><span class=\"ez-toc-section\" id=\"2-bimetal-thermometer\"><\/span>2. Nhi\u1ec7t k\u1ebf l\u01b0\u1ee1ng kim<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Nhi\u1ec7t k\u1ebf l\u01b0\u1ee1ng kim c\u00f3 k\u1ebft c\u1ea5u ch\u1eafc ch\u1eafn, kh\u00f4ng c\u1ea7n ngu\u1ed3n \u0111i\u1ec7n v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi ch\u1ec9 th\u1ecb t\u1ea1i ch\u1ed7. Do ph\u1ea7n t\u1eed l\u01b0\u1ee1ng kim c\u1ea7n th\u1eddi gian \u0111\u1ea1t c\u00e2n b\u1eb1ng nhi\u1ec7t, t\u1ed1c \u0111\u1ed9 \u0111\u00e1p \u1ee9ng th\u01b0\u1eddng ch\u1eadm h\u01a1n c\u1ea3m bi\u1ebfn \u0111i\u1ec7n. V\u1ecf th\u00e9p kh\u00f4ng g\u1ec9 th\u00edch h\u1ee3p cho m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p v\u00e0 l\u1eafp \u0111\u1eb7t ngo\u00e0i tr\u1eddi; d\u1ea3i nhi\u1ec7t \u0111i\u1ec3n h\u00ecnh kho\u1ea3ng -70\u00b0C \u0111\u1ebfn 600\u00b0C t\u00f9y c\u1ea5u h\u00ecnh.<\/p>\n\n\n\n<p><strong>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-medium is-style-rounded\"><img decoding=\"async\" width=\"300\" height=\"250\" data-id=\"2480\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_Bottom_mount_thermometer_Large-300x250.jpg\" alt=\"\" class=\"wp-image-2480\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_Bottom_mount_thermometer_Large-300x250.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_Bottom_mount_thermometer_Large-1024x853.jpg 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_Bottom_mount_thermometer_Large-768x640.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_Bottom_mount_thermometer_Large-600x500.jpg 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge_Bottom_mount_thermometer_Large.jpg 1200w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-element-caption\">Nhi\u1ec7t k\u1ebf l\u01b0\u1ee1ng kim ch\u00e2n \u0111\u1ee9ng<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-medium is-style-rounded\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"250\" data-id=\"2488\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-angle-adjustabled-L-300x250.jpg\" alt=\"\" class=\"wp-image-2488\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-angle-adjustabled-L-300x250.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-angle-adjustabled-L-1024x853.jpg 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-angle-adjustabled-L-768x640.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-angle-adjustabled-L-600x500.jpg 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-thermometer-angle-adjustabled-L.jpg 1200w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-element-caption\">Nhi\u1ec7t k\u1ebf l\u01b0\u1ee1ng kim g\u00f3c \u0111i\u1ec1u ch\u1ec9nh<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p>Hai d\u1ea3i kim lo\u1ea1i c\u00f3 h\u1ec7 s\u1ed1 gi\u00e3n n\u1edf nhi\u1ec7t kh\u00e1c nhau \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u00e0 cu\u1ed9n th\u00e0nh d\u1ea1ng xo\u1eafn. M\u1ed9t \u0111\u1ea7u \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh, \u0111\u1ea7u c\u00f2n l\u1ea1i n\u1ed1i v\u1edbi kim ch\u1ec9 th\u1ecb. Khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i, ch\u00eanh l\u1ec7ch \u0111\u1ed9 gi\u00e3n n\u1edf l\u00e0m cu\u1ed9n l\u01b0\u1ee1ng kim bi\u1ebfn d\u1ea1ng v\u00e0 quay kim tr\u00ean m\u1eb7t s\u1ed1.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-1d13788348a12475c987579d887b8e9d\" id=\"h-3-gas-expansion-thermometer\"><span class=\"ez-toc-section\" id=\"3-gas-expansion-thermometer\"><\/span>3. Nhi\u1ec7t k\u1ebf gi\u00e3n n\u1edf kh\u00ed<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Nhi\u1ec7t k\u1ebf gi\u00e3n n\u1edf kh\u00ed c\u00f3 kh\u1ea3 n\u0103ng \u0111\u00e1p \u1ee9ng nhanh v\u00e0 truy\u1ec1n t\u00edn hi\u1ec7u c\u01a1 h\u1ecdc qua \u1ed1ng mao d\u1eabn \u0111\u1ec3 ch\u1ec9 th\u1ecb t\u1eeb xa, v\u1edbi kho\u1ea3ng c\u00e1ch c\u00f3 th\u1ec3 l\u00ean \u0111\u1ebfn 60 m t\u00f9y c\u1ea5u h\u00ecnh. Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng d\u1ecdc theo \u1ed1ng mao d\u1eabn c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u1ebft qu\u1ea3 \u0111o n\u00ean c\u1ea7n c\u00e2n nh\u1eafc khi l\u1eafp \u0111\u1eb7t. D\u1ea3i nhi\u1ec7t \u0111i\u1ec3n h\u00ecnh kho\u1ea3ng -200\u00b0C \u0111\u1ebfn 700\u00b0C t\u00f9y lo\u1ea1i kh\u00ed n\u1ea1p v\u00e0 thi\u1ebft k\u1ebf.<\/p>\n\n\n\n<p><strong>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large is-style-rounded\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"853\" data-id=\"2507\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-gas-actuated-1024x853.jpg\" alt=\"\" class=\"wp-image-2507\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-gas-actuated-1024x853.jpg 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-gas-actuated-300x250.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-gas-actuated-768x640.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-gas-actuated-600x500.jpg 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-gas-actuated.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Nhi\u1ec7t k\u1ebf gi\u00e3n n\u1edf kh\u00ed<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-style-rounded\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"853\" data-id=\"2534\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-capillary-1024x853.jpg\" alt=\"\" class=\"wp-image-2534\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-capillary-1024x853.jpg 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-capillary-300x250.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-capillary-768x640.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-capillary-600x500.jpg 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-expansion-thermometer-capillary.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Nhi\u1ec7t k\u1ebf gi\u00e3n n\u1edf kh\u00ed d\u1ea1ng \u1ed1ng mao d\u1eabn<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p>H\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c n\u1ea1p kh\u00ed k\u00edn trong b\u1ea7u \u0111o v\u00e0 \u1ed1ng mao d\u1eabn. Khi nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i, \u00e1p su\u1ea5t kh\u00ed thay \u0111\u1ed5i t\u01b0\u01a1ng \u1ee9ng, l\u00e0m ph\u1ea7n t\u1eed \u0111\u00e0n h\u1ed3i trong c\u01a1 c\u1ea5u ch\u1ec9 th\u1ecb bi\u1ebfn d\u1ea1ng v\u00e0 d\u1eabn \u0111\u1ed9ng kim \u0111\u1ec3 hi\u1ec3n th\u1ecb nhi\u1ec7t \u0111\u1ed9.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-df7b63a9d0caeb083441b2a3b3b6f91d\" id=\"h-4-thermocouple-thermometer\"><span class=\"ez-toc-section\" id=\"4-thermocouple-thermometer\"><\/span>4. C\u1eb7p nhi\u1ec7t \u0111i\u1ec7n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u1eb7p nhi\u1ec7t \u0111i\u1ec7n c\u00f3 d\u1ea3i \u0111o r\u1ed9ng, \u0111\u00e1p \u1ee9ng nhanh v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u h\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p. \u0110\u1ed9 ch\u00ednh x\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i c\u1eb7p nhi\u1ec7t, b\u00f9 m\u1ed1i n\u1ed1i l\u1ea1nh, d\u00e2y d\u1eabn v\u00e0 thi\u1ebft b\u1ecb x\u1eed l\u00fd t\u00edn hi\u1ec7u. Trong m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n ho\u1eb7c m\u00e0i m\u00f2n, n\u00ean s\u1eed d\u1ee5ng \u1ed1ng b\u1ea3o v\u1ec7 ph\u00f9 h\u1ee3p \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd. D\u1ea3i \u0111o c\u00f3 th\u1ec3 t\u1eeb kho\u1ea3ng -200\u00b0C \u0111\u1ebfn 2.500\u00b0C t\u00f9y v\u1eadt li\u1ec7u c\u1eb7p nhi\u1ec7t.<\/p>\n\n\n\n<p><strong>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"260\" height=\"220\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/07_SJ_thermocouple_thermometer.png\" alt=\"\" class=\"wp-image-2385\" style=\"width:300px\"\/><figcaption class=\"wp-element-caption\"><strong>C\u1eb7p nhi\u1ec7t \u0111i\u1ec7n<\/strong><\/figcaption><\/figure>\n\n\n\n<p>C\u1eb7p nhi\u1ec7t \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean hi\u1ec7u \u1ee9ng nhi\u1ec7t \u0111i\u1ec7n. Hai d\u00e2y d\u1eabn b\u1eb1ng kim lo\u1ea1i kh\u00e1c nhau t\u1ea1o ra \u0111i\u1ec7n \u00e1p khi c\u00f3 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa m\u1ed1i n\u1ed1i \u0111o v\u00e0 m\u1ed1i n\u1ed1i tham chi\u1ebfu. \u0110i\u1ec7n \u00e1p n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft b\u1ecb \u0111o chuy\u1ec3n \u0111\u1ed5i th\u00e0nh gi\u00e1 tr\u1ecb nhi\u1ec7t \u0111\u1ed9 theo \u0111\u1eb7c t\u00ednh c\u1ee7a t\u1eebng lo\u1ea1i c\u1eb7p nhi\u1ec7t; h\u1ec7 th\u1ed1ng ph\u1ea3i th\u1ef1c hi\u1ec7n b\u00f9 m\u1ed1i n\u1ed1i l\u1ea1nh \u0111\u1ec3 b\u1ea3o \u0111\u1ea3m \u0111\u1ed9 ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-f2e3611fcf0e77e61f21900536fd75c0\" id=\"h-5-resistance-thermometer-rtd\"><span class=\"ez-toc-section\" id=\"5-resistance-thermometer-rtd\"><\/span>5. C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n tr\u1edf (RTD)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n tr\u1edf (RTD) n\u1ed5i b\u1eadt v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c, \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh v\u00e0 kh\u1ea3 n\u0103ng l\u1eb7p l\u1ea1i, \u0111\u1eb7c bi\u1ec7t trong d\u1ea3i nhi\u1ec7t th\u1ea5p \u0111\u1ebfn trung b\u00ecnh. RTD \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111i\u1ec1u khi\u1ec3n quy tr\u00ecnh, n\u0103ng l\u01b0\u1ee3ng, ch\u1ebf bi\u1ebfn v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng \u0111o ch\u00ednh x\u00e1c. Ph\u1ea7n t\u1eed c\u1ea3m bi\u1ebfn c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 ph\u00f9 h\u1ee3p tr\u01b0\u1edbc rung \u0111\u1ed9ng, \u0111\u1ed9 \u1ea9m v\u00e0 m\u00f4i ch\u1ea5t \u0103n m\u00f2n. D\u1ea3i nhi\u1ec7t \u0111i\u1ec3n h\u00ecnh kho\u1ea3ng -200\u00b0C \u0111\u1ebfn 600\u00b0C t\u00f9y c\u1ea5u t\u1ea1o.<\/p>\n\n\n\n<p><strong>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"260\" height=\"220\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/08_SJ_resistance_thermometer_RTD.png\" alt=\"\" class=\"wp-image-2386\"\/><figcaption class=\"wp-element-caption\">C\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111i\u1ec7n tr\u1edf (RTD)<\/figcaption><\/figure>\n\n\n\n<p>RTD \u0111o nhi\u1ec7t \u0111\u1ed9 d\u1ef1a tr\u00ean s\u1ef1 thay \u0111\u1ed5i \u0111i\u1ec7n tr\u1edf c\u1ee7a kim lo\u1ea1i theo nhi\u1ec7t \u0111\u1ed9. B\u1ea1ch kim l\u00e0 v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn nh\u1edd \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh, t\u00ednh tuy\u1ebfn t\u00ednh v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a t\u1ed1t; Pt100 l\u00e0 c\u1ea5u h\u00ecnh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00f4ng nghi\u1ec7p. RTD ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 l\u1eb7p l\u1ea1i cao.<\/p>\n\n\n\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb ph\u1ee5 thu\u1ed9c v\u00e0o d\u1ea3i nhi\u1ec7t, \u0111\u1ed9 ch\u00ednh x\u00e1c, t\u1ed1c \u0111\u1ed9 \u0111\u00e1p \u1ee9ng, v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t, m\u00f4i tr\u01b0\u1eddng v\u1eadn h\u00e0nh v\u00e0 nhu c\u1ea7u truy\u1ec1n t\u00edn hi\u1ec7u. H\u00e3y li\u00ean h\u1ec7 SJ Gauge \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n c\u1ea5u h\u00ecnh ph\u00f9 h\u1ee3p, ho\u1eb7c xem th\u00eam c\u00e1c b\u00e0i vi\u1ebft chuy\u00ean m\u00f4n v\u1ec1 \u0111o nhi\u1ec7t \u0111\u1ed9 b\u00ean d\u01b0\u1edbi.<\/p>","protected":false},"excerpt":{"rendered":"<p>There are many different types of thermometers for industrial applications, with different working principles and uses. Follow us to learn about these principles and types of thermometers. 1.Glass Thermometer Glass thermometers have a simple structure and low cost. Not only common in daily life, you will find these are also widely used in industrial applications. [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":2388,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[72],"class_list":["post-2378","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>Types of Industrial Thermometers and How to Choose the Right One - SJ Gauge | Pressure Gauges, Thermometers &amp; Pressure Sensors<\/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.sj-gauge.com\/vi\/industrial-thermometers-types\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Types of Industrial Thermometers and How to Choose the Right One\" \/>\n<meta property=\"og:description\" content=\"There are many different types of thermometers for industrial applications, with different working principles and uses. 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