{"id":2672,"date":"2022-06-09T11:53:46","date_gmt":"2022-06-09T03:53:46","guid":{"rendered":"https:\/\/sj-gauge.com\/?p=2672"},"modified":"2026-04-25T22:28:18","modified_gmt":"2026-04-25T14:28:18","slug":"simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/vi\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\/","title":{"rendered":"C\u00e1c b\u01b0\u1edbc \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 ph\u00e2n bi\u1ec7t \u00e1p su\u1ea5t gauge v\u00e0 \u00e1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i"},"content":{"rendered":"<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>B\u1ea1n c\u00f3 bi\u1ebft s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u00e1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i v\u00e0 \u00e1p su\u1ea5t gauge kh\u00f4ng? \u00c1p su\u1ea5t d\u01b0\u01a1ng v\u00e0 \u00e1p su\u1ea5t \u00e2m c\u00f3 \u00fd ngh\u0129a g\u00ec? \u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t h\u1ee3p ch\u1ea5t l\u00e0 g\u00ec? SJ Gauge gi\u00fap b\u1ea1n ch\u1ec9 c\u1ea7n \u0111\u1ecdc b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 ti\u00eau chu\u1ea9n \u0111o l\u01b0\u1eddng cho c\u00e1c lo\u1ea1i \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t kh\u00e1c nhau.<\/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\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\/#1-what-is-pressure\" >1. \u00c1p su\u1ea5t l\u00e0 g\u00ec?<\/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\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\/#2-atmospheric-pressure\" >2. \u00c1p su\u1ea5t kh\u00ed quy\u1ec3n:<\/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\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\/#3-absolute-pressure-and-gauge-pressure\" >3. \u00c1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i v\u00e0 \u00e1p su\u1ea5t t\u01b0\u01a1ng \u0111\u1ed1i:<\/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\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\/#4-vacuum-negative-pressure\" >4. H\u00fat ch\u00e2n kh\u00f4ng \/ \u00c1p su\u1ea5t \u00e2m:<\/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\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\/#5-compound-pressure\" >5. \u00c1p su\u1ea5t t\u1ed5ng h\u1ee3p:<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-6719cd0773768db12249cc1757392424\" id=\"h-1-what-is-pressure\"><span class=\"ez-toc-section\" id=\"1-what-is-pressure\"><\/span>1. \u00c1p su\u1ea5t l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u201c\u00c1p su\u1ea5t\u201d l\u00e0 th\u01b0\u1edbc \u0111o l\u1ef1c t\u00e1c d\u1ee5ng vu\u00f4ng g\u00f3c v\u1edbi m\u1ed9t \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch, c\u00e1c \u0111\u01a1n v\u1ecb th\u00f4ng d\u1ee5ng bao g\u1ed3m Kg\/cm\u00b2, Bar, Psi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-fb520c61afd6452e17bb14e37ba76de0\" id=\"h-2-atmospheric-pressure\"><span class=\"ez-toc-section\" id=\"2-atmospheric-pressure\"><\/span>2. \u00c1p su\u1ea5t kh\u00ed quy\u1ec3n:<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u00c1p su\u1ea5t kh\u00f4ng kh\u00ed \u0111o \u0111\u01b0\u1ee3c \u1edf m\u1ef1c n\u01b0\u1edbc bi\u1ec3n l\u00e0 kho\u1ea3ng 1 kg\/cm\u00b2, \u0111\u00e2y l\u00e0 tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a kh\u00f4ng kh\u00ed trong kh\u00ed quy\u1ec3n, do \u0111\u00f3 n\u00f3 c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u00e1p su\u1ea5t kh\u00ed quy\u1ec3n v\u1edbi \u0111\u01a1n v\u1ecb l\u00e0 atm. 1 kg\/cm\u00b2 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi 1 atm. Gi\u00e1 tr\u1ecb th\u1ef1c t\u1ebf c\u1ee7a \u00e1p su\u1ea5t kh\u00ed quy\u1ec3n s\u1ebd thay \u0111\u1ed5i t\u00f9y theo \u0111\u1ed9 cao, nhi\u1ec7t \u0111\u1ed9, th\u1eddi ti\u1ebft, v.v.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-375f111dd65232db667ffd2cb438c1af\" id=\"h-3-absolute-pressure-and-gauge-pressure\"><span class=\"ez-toc-section\" id=\"3-absolute-pressure-and-gauge-pressure\"><\/span>3. \u00c1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i v\u00e0 \u00e1p su\u1ea5t t\u01b0\u01a1ng \u0111\u1ed1i:<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1667\" height=\"943\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge.png\" alt=\"\" class=\"wp-image-4481\" style=\"object-fit:cover\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge.png 1667w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-300x170.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-1024x579.png 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-768x434.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-1536x869.png 1536w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-18x10.png 18w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-600x339.png 600w\" sizes=\"(max-width: 1667px) 100vw, 1667px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-absolute-pressure\">\u00c1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i:<\/h3>\n\n\n\n<p>N\u00f3 x\u1ea3y ra khi \u0111\u1ed3ng h\u1ed3 \u0111o ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3. \u00c1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng c\u00f3 gi\u00e1 tr\u1ecb \u00e2m, \u00e1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i c\u00f3 c\u00f9ng ti\u00eau chu\u1ea9n tham chi\u1ebfu v\u00e0 s\u1ebd kh\u00f4ng dao \u0111\u1ed9ng khi \u0111o.<\/p>\n\n\n\n<p>\u00c1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 t\u1ed5ng c\u1ee7a \u00e1p su\u1ea5t gauge v\u00e0 \u00e1p su\u1ea5t kh\u00ed quy\u1ec3n. N\u00f3i c\u00e1ch kh\u00e1c, s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u00e1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i v\u00e0 \u00e1p su\u1ea5t gauge n\u1eb1m \u1edf vi\u1ec7c c\u00f3 t\u00ednh \u0111\u1ebfn \u00e1p su\u1ea5t kh\u00ed quy\u1ec3n khi \u0111o hay kh\u00f4ng. Khi c\u1ea7n m\u1ed9t ph\u00e9p \u0111o kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi \u00e1p su\u1ea5t kh\u00ed quy\u1ec3n, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i, v\u00ed d\u1ee5: ng\u00e0nh c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m s\u1eed d\u1ee5ng \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i trong qu\u00e1 tr\u00ecnh \u0111\u00f3ng g\u00f3i \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 t\u01b0\u01a1i ngon c\u1ee7a th\u1ef1c ph\u1ea9m.<\/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-medium has-custom-border is-style-default\" style=\"margin-top:0;margin-right:0;margin-bottom:0;margin-left:0\"><img decoding=\"async\" width=\"289\" height=\"300\" data-id=\"2674\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute2_100kpa-289x300.png\" alt=\"\" class=\"wp-image-2674\" style=\"border-style:none;border-width:0px;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-left-radius:0px;border-bottom-right-radius:0px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute2_100kpa-289x300.png 289w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute2_100kpa-986x1024.png 986w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute2_100kpa-768x798.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute2_100kpa-300x312.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute2_100kpa-600x623.png 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute2_100kpa.png 1386w\" sizes=\"(max-width: 289px) 100vw, 289px\" \/><figcaption class=\"wp-element-caption\">H\u00ecnh 1<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-medium has-custom-border is-style-default\" style=\"margin-top:0;margin-right:0;margin-bottom:0;margin-left:0\"><img decoding=\"async\" width=\"300\" height=\"300\" data-id=\"2675\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-300x300.png\" alt=\"\" class=\"wp-image-2675\" style=\"border-style:none;border-width:0px;border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-left-radius:0px;border-bottom-right-radius:0px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-300x300.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-1024x1024.png 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-150x150.png 150w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-768x768.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-600x600.png 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-100x100.png 100w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa.png 1314w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-element-caption\">H\u00ecnh 2<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p>H\u00ecnh 1 v\u00e0 2 cho th\u1ea5y gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i \u1edf 1 atm (kho\u1ea3ng 100 kPa).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-gauge-pressure\">\u00c1p su\u1ea5t \u0111o:<\/h3>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi \u00e1p su\u1ea5t kh\u00ed quy\u1ec3n, \u0111\u01b0\u1ee3c \u0111o d\u1ef1a tr\u00ean \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed, ti\u00eau chu\u1ea9n \u0111o l\u01b0\u1eddng kh\u00f4ng c\u1ed1 \u0111\u1ecbnh. N\u00f3 c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u00f9y theo m\u00f4i tr\u01b0\u1eddng v\u00e0 k\u1ebft qu\u1ea3 \u0111o c\u00f3 th\u1ec3 l\u00e0 s\u1ed1 \u00e2m.<\/p>\n\n\n\n<p>\u00c1p su\u1ea5t \u0111o \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi \u00e1p su\u1ea5t kh\u00ed quy\u1ec3n l\u00e0m ti\u00eau chu\u1ea9n tham chi\u1ebfu, do \u0111\u00f3 c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u00e1c nhau c\u00f3 th\u1ec3 c\u00f3 c\u00e1c \u0111i\u1ec3m tham chi\u1ebfu \u0111o l\u01b0\u1eddng kh\u00e1c nhau. V\u00ed d\u1ee5: \u00e1p su\u1ea5t kh\u00ed quy\u1ec3n c\u00f3 th\u1ec3 t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p v\u00e0o nh\u1eefng ng\u00e0y m\u01b0a t\u1ea1i c\u00f9ng m\u1ed9t \u0111\u1ecba \u0111i\u1ec3m. Gi\u00e1 tr\u1ecb \u0111o l\u01b0\u1eddng c\u00f3 th\u1ec3 \u00e2m do s\u1ef1 ch\u00eanh l\u1ec7ch gi\u1eefa c\u00e1c ngu\u1ed3n \u00e1p su\u1ea5t. \u0110i\u1ec1u n\u00e0y th\u01b0\u1eddng x\u1ea3y ra v\u1edbi \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t ch\u00e2n kh\u00f4ng v\u00e0 \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t h\u1ed7n h\u1ee3p. Gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t hi\u1ec3n th\u1ecb tr\u00ean m\u1eb7t \u0111\u1ed3ng h\u1ed3 kh\u00f4ng \u0111\u1ea1i di\u1ec7n cho \u00e1p su\u1ea5t th\u1ef1c t\u1ebf c\u1ee7a m\u00f4i tr\u01b0\u1eddng.<\/p>\n\n\n\n<p class=\"has-text-align-center\"><strong>\u00c1p su\u1ea5t gauge (Pg) = \u00c1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i (Pabs) \u2013 \u00c1p su\u1ea5t kh\u00ed quy\u1ec3n (atm)<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"985\" height=\"1024\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/gauge0kpa-985x1024.png\" alt=\"\" class=\"wp-image-2678\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/gauge0kpa-985x1024.png 985w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/gauge0kpa-289x300.png 289w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/gauge0kpa-768x798.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/gauge0kpa-300x312.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/gauge0kpa-600x624.png 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/gauge0kpa.png 1369w\" sizes=\"(max-width: 985px) 100vw, 985px\" \/><figcaption class=\"wp-element-caption\">Gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t c\u1ee7a m\u1ed9t \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t d\u01b0\u01a1ng \u1edf 1 atm (kho\u1ea3ng 100 kPa)<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-36cf2f2f87a52db4ebd519e2b8e94c0f\" id=\"h-4-vacuum-negative-pressure\"><span class=\"ez-toc-section\" id=\"4-vacuum-negative-pressure\"><\/span>4. H\u00fat ch\u00e2n kh\u00f4ng \/ \u00c1p su\u1ea5t \u00e2m:<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Khi \u00e1p su\u1ea5t trung b\u00ecnh th\u1ea5p h\u01a1n \u00e1p su\u1ea5t kh\u00ed quy\u1ec3n, n\u00f3 t\u1ea1o ra m\u1ed9t ch\u00e2n kh\u00f4ng \u2014 c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u00e1p su\u1ea5t \u00e2m. C\u1ea3 \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t ch\u00e2n kh\u00f4ng v\u00e0 \u0111\u1ed3ng h\u1ed3 \u0111o \u00e1p su\u1ea5t h\u1ee3p ch\u1ea5t \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o \u00e1p su\u1ea5t \u00e2m, ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ng\u00e0nh c\u00f4ng nghi\u1ec7p th\u1ef1c ph\u1ea9m.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-2-1024x1024.png\" alt=\"\" class=\"wp-image-2679\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-2-1024x1024.png 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-2-300x300.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-2-150x150.png 150w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-2-768x768.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-2-600x600.png 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-2-100x100.png 100w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/absolute100kpa-2.png 1314w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t \u00e2m t\u1ea1i 1 atm<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-fb16e2b14c22a6c6abd498a0067541c5\" id=\"h-5-compound-pressure\"><span class=\"ez-toc-section\" id=\"5-compound-pressure\"><\/span>5. \u00c1p su\u1ea5t t\u1ed5ng h\u1ee3p:<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u00c1p k\u1ebf k\u00e9p \u0111o c\u1ea3 \u00e1p su\u1ea5t d\u01b0\u01a1ng v\u00e0 \u00e1p su\u1ea5t \u00e2m c\u00f9ng m\u1ed9t l\u00fac. Khi \u0111o \u00e1p su\u1ea5t d\u01b0\u01a1ng, kim \u0111\u1ed3ng h\u1ed3 s\u1ebd di chuy\u1ec3n theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3, v\u00e0 s\u1ebd di chuy\u1ec3n ng\u01b0\u1ee3c chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3 khi \u0111o \u00e1p su\u1ea5t \u00e2m. \u00c1p k\u1ebf k\u00e9p th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111o l\u01b0\u1eddng b\u01a1m, h\u1ec7 th\u1ed1ng HVAC v\u00e0 thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n ch\u00e1y.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1667\" height=\"943\" src=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge.png\" alt=\"\" class=\"wp-image-4481\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge.png 1667w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-300x170.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-1024x579.png 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-768x434.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-1536x869.png 1536w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-18x10.png 18w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/SJ-Gauge-pressure-distinguish-gauge-600x339.png 600w\" sizes=\"(max-width: 1667px) 100vw, 1667px\" \/><figcaption class=\"wp-element-caption\">Gi\u00e1 tr\u1ecb \u00e1p su\u1ea5t c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t k\u00e9p \u1edf 1 atm<\/figcaption><\/figure>\n\n\n\n<p>Ch\u00fang t\u00f4i hy v\u1ecdng r\u1eb1ng b\u00e2y gi\u1edd b\u1ea1n \u0111\u00e3 c\u00f3 m\u1ed9t hi\u1ec3u bi\u1ebft c\u01a1 b\u1ea3n v\u1ec1 ti\u00eau chu\u1ea9n \u0111o l\u01b0\u1eddng cho c\u00e1c lo\u1ea1i \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t kh\u00e1c nhau. B\u1ea1n c\u00f3 mu\u1ed1n bi\u1ebft v\u1ec1 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ea7n xem x\u00e9t khi mua \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t kim th\u00f4ng d\u1ee5ng? Hay c\u00e1ch kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t? H\u00e3y nh\u1ea5p v\u00e0o c\u00e1c li\u00ean k\u1ebft b\u00ean d\u01b0\u1edbi \u0111\u1ec3 t\u00ecm hi\u1ec3u th\u00eam!<\/p>","protected":false},"excerpt":{"rendered":"<p>B\u1ea1n c\u00f3 bi\u1ebft s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u00e1p su\u1ea5t tuy\u1ec7t \u0111\u1ed1i v\u00e0 \u00e1p su\u1ea5t gauge kh\u00f4ng? \u00c1p su\u1ea5t d\u01b0\u01a1ng v\u00e0 \u00e1p su\u1ea5t \u00e2m c\u00f3 \u00fd ngh\u0129a g\u00ec? \u1ee8ng d\u1ee5ng c\u1ee7a \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t h\u1ee3p ch\u1ea5t l\u00e0 g\u00ec? SJ Gauge gi\u00fap b\u1ea1n ch\u1ec9 c\u1ea7n \u0111\u1ecdc b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 ti\u00eau chu\u1ea9n \u0111o l\u01b0\u1eddng cho c\u00e1c lo\u1ea1i \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t kh\u00e1c nhau.<\/p>","protected":false},"author":2,"featured_media":2681,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[73],"class_list":["post-2672","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-knowledge"],"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>Simple Steps to Distinguish Gauge Pressure and Absolute Pressure - 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\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Simple Steps to Distinguish Gauge Pressure and Absolute Pressure\" \/>\n<meta property=\"og:description\" content=\"Do you know the difference between absolute pressure and gauge pressure? What do positive and negative pressures mean? Where is the application for the compound pressure gauge? SJ Gauge let you just by reading this article, you can have a deeper understanding of the measurement standard for different types of pressure gauges. 1. What Is [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sj-gauge.com\/vi\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\/\" \/>\n<meta property=\"og:site_name\" content=\"SJ Gauge | Pressure Gauges, Thermometers &amp; Pressure Sensors\" \/>\n<meta property=\"article:published_time\" content=\"2022-06-09T03:53:46+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-25T14:28:18+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/BN2-01.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\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/\"},\"author\":{\"name\":\"SJ Gauge\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/#\\\/schema\\\/person\\\/cbc9e642e49a53b18b3eb832486bd52c\"},\"headline\":\"Simple Steps to Distinguish Gauge Pressure and Absolute Pressure\",\"datePublished\":\"2022-06-09T03:53:46+00:00\",\"dateModified\":\"2026-04-25T14:28:18+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/\"},\"wordCount\":553,\"publisher\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.sj-gauge.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/BN2-01.jpg\",\"keywords\":[\"Knowledge\"],\"articleSection\":[\"Knowledge\"],\"inLanguage\":\"vi\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/\",\"url\":\"https:\\\/\\\/www.sj-gauge.com\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/\",\"name\":\"Simple Steps to Distinguish Gauge Pressure and Absolute Pressure - SJ Gauge | Pressure Gauges, Thermometers &amp; Pressure Sensors\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.sj-gauge.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/BN2-01.jpg\",\"datePublished\":\"2022-06-09T03:53:46+00:00\",\"dateModified\":\"2026-04-25T14:28:18+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/#breadcrumb\"},\"inLanguage\":\"vi\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.sj-gauge.com\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.sj-gauge.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/BN2-01.jpg\",\"contentUrl\":\"https:\\\/\\\/www.sj-gauge.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/BN2-01.jpg\",\"width\":800,\"height\":500},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/simple-steps-to-distinguish-gauge-pressure-and-absolute-pressure\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.sj-gauge.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Simple Steps to Distinguish Gauge Pressure and Absolute Pressure\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/#website\",\"url\":\"https:\\\/\\\/www.sj-gauge.com\\\/\",\"name\":\"SJ Gauge | Pressure Gauges, Thermometers &amp; Pressure Sensors\",\"description\":\"Manufacturer of industrial pressure gauges, pressure sensors, and transmitters. 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What do positive and negative pressures mean? Where is the application for the compound pressure gauge? SJ Gauge let you just by reading this article, you can have a deeper understanding of the measurement standard for different types of pressure gauges. 1. 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