{"id":2164,"date":"2025-12-10T15:43:00","date_gmt":"2025-12-10T07:43:00","guid":{"rendered":"https:\/\/sj-gauge.com\/?p=2164"},"modified":"2026-04-24T19:22:57","modified_gmt":"2026-04-24T11:22:57","slug":"explosion-proof-pressure-transmitter","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/vi\/explosion-proof-pressure-transmitter\/","title":{"rendered":"C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 l\u00e0 g\u00ec? H\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 c\u00e1c c\u00f4ng ngh\u1ec7 v\u00e0 \u1ee9ng d\u1ee5ng ch\u00ednh"},"content":{"rendered":"<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<h4 class=\"wp-block-heading\" id=\"h-how-to-choose-the-right-pressure-transmitter-for-a-specific-application\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t ph\u00f9 h\u1ee3p cho m\u1ed9t \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3?<\/h4>\n\n\n\n<p>C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb c\u1ea3m bi\u1ebfn c\u00f4ng nghi\u1ec7p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111o \u00e1p su\u1ea5t c\u1ee7a kh\u00ed, ch\u1ea5t l\u1ecfng ho\u1eb7c h\u01a1i n\u01b0\u1edbc v\u00e0 chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n ti\u00eau chu\u1ea9n (v\u00ed d\u1ee5: 4-20mA, 0-10V).<br>Tuy nhi\u00ean, c\u00e1c m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c kh\u00e1c nhau \u0111\u1eb7t ra nh\u1eefng y\u00eau c\u1ea7u ri\u00eang bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t. C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 v\u00e0 c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t th\u00f4ng th\u01b0\u1eddng l\u00e0 hai lo\u1ea1i ch\u00ednh, m\u1ed7i lo\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c nhu c\u1ea7u \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3. B\u00e1o c\u00e1o n\u00e0y ph\u00e2n t\u00edch chi ti\u1ebft s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa hai lo\u1ea1i c\u1ea3m bi\u1ebfn n\u00e0y v\u1ec1 tri\u1ebft l\u00fd thi\u1ebft k\u1ebf, \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng, c\u00e1c t\u00ecnh hu\u1ed1ng \u1ee9ng d\u1ee5ng, ti\u00eau chu\u1ea9n ch\u1ee9ng nh\u1eadn, chi ph\u00ed v\u00e0 b\u1ea3o tr\u00ec, cung c\u1ea5p cho \u0111\u1ed9c gi\u1ea3 m\u1ed9t t\u00e0i li\u1ec7u tham kh\u1ea3o k\u1ef9 thu\u1eadt s\u00e2u r\u1ed9ng.<\/p>\n<\/blockquote>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-medium-font-size\">C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 so v\u1edbi c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t th\u00f4ng th\u01b0\u1eddng<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-regular\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>M\u1ee5c so s\u00e1nh<\/strong><\/th><th><strong>C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5<\/strong><\/th><th>C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t t\u1ed5ng qu\u00e1t<\/th><\/tr><\/thead><tbody><tr><td><strong>Tri\u1ebft l\u00fd thi\u1ebft k\u1ebf<\/strong><\/td><td>\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf cho m\u00f4i tr\u01b0\u1eddng d\u1ec5 ch\u00e1y n\u1ed5 \u0111\u1ec3 ng\u0103n ch\u1eb7n s\u1ef1 ch\u00e1y n\u1ed5 do tia l\u1eeda \u0111i\u1ec7n ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 cao, \u01b0u ti\u00ean an to\u00e0n.<\/td><td>T\u1eadp trung v\u00e0o \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a \u0111o \u00e1p su\u1ea5t v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed m\u00e0 kh\u00f4ng xem x\u00e9t c\u00e1c r\u1ee7i ro n\u1ed5.<\/td><\/tr><tr><td><strong>C\u1ea5u tr\u00fac v\u1eadt li\u1ec7u<\/strong><\/td><td>V\u1ecf b\u1ecdc c\u00f3 \u0111\u1ed9 b\u1ec1n cao (v\u00ed d\u1ee5: th\u00e9p kh\u00f4ng g\u1ec9 316L, h\u1ee3p kim nh\u00f4m), kh\u1ea3 n\u0103ng ch\u1ed1ng th\u1ea5m n\u01b0\u1edbc v\u00e0 b\u1ee5i cao (IP66-IP68), v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu \u00e1p su\u1ea5t n\u1ed5 b\u00ean trong.<\/td><td>C\u00e1c v\u1eadt li\u1ec7u th\u00f4ng d\u1ee5ng nh\u01b0 nh\u1ef1a ho\u1eb7c kim lo\u1ea1i ti\u00eau chu\u1ea9n, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng th\u1ea5m n\u01b0\u1edbc \u1edf m\u1ee9c trung b\u00ecnh (IP54-IP65).<\/td><\/tr><tr><td><strong>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/strong><\/td><td>\u0110o \u00e1p su\u1ea5t + c\u00f4ng ngh\u1ec7 ch\u1ed1ng ch\u00e1y n\u1ed5 (v\u00ed d\u1ee5: ch\u1ed1ng ch\u00e1y n\u1ed5 Ex d, an to\u00e0n n\u1ed9i t\u1ea1i Ex i), gi\u1edbi h\u1ea1n n\u0103ng l\u01b0\u1ee3ng ho\u1eb7c tia l\u1eeda.<\/td><td>\u0110o \u00e1p su\u1ea5t v\u00e0 xu\u1ea5t ra t\u00edn hi\u1ec7u \u0111i\u1ec7n ti\u00eau chu\u1ea9n (v\u00ed d\u1ee5: 4-20mA) m\u00e0 kh\u00f4ng c\u00f3 thi\u1ebft k\u1ebf ch\u1ed1ng ch\u00e1y n\u1ed5.<\/td><\/tr><tr><td><strong>Ti\u00eau chu\u1ea9n ch\u1ee9ng nh\u1eadn<\/strong><\/td><td>Ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf v\u1ec1 ch\u1ed1ng ch\u00e1y n\u1ed5 (v\u00ed d\u1ee5: ATEX, IECEx), bao g\u1ed3m ph\u00e2n lo\u1ea1i khu v\u1ef1c (Zone 0\/1\/2) v\u00e0 ph\u00e2n lo\u1ea1i nh\u00f3m kh\u00ed (IIB\/IIC).<\/td><td>\u0110\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p c\u01a1 b\u1ea3n (v\u00ed d\u1ee5: CE, UL) m\u00e0 kh\u00f4ng y\u00eau c\u1ea7u ch\u1ee9ng nh\u1eadn ch\u1ed1ng ch\u00e1y n\u1ed5.<\/td><\/tr><tr><td><strong>C\u00e1c t\u00ecnh hu\u1ed1ng \u1ee9ng d\u1ee5ng<\/strong><\/td><td>M\u00f4i tr\u01b0\u1eddng c\u00f3 nguy c\u01a1 cao: \u0111\u01b0\u1eddng \u1ed1ng d\u1eabn d\u1ea7u v\u00e0 kh\u00ed \u0111\u1ed1t, l\u00f2 ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc, m\u1ecf than (theo d\u00f5i kh\u00ed), ng\u00e0nh d\u01b0\u1ee3c ph\u1ea9m (ch\u1ea5t dung m\u00f4i d\u1ec5 ch\u00e1y).<\/td><td>M\u00f4i tr\u01b0\u1eddng chung: x\u1eed l\u00fd n\u01b0\u1edbc, h\u1ec7 th\u1ed1ng HVAC, ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m, s\u1ea3n xu\u1ea5t c\u01a1 kh\u00ed (h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c).<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"805\" height=\"408\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter.jpg\" alt=\"\" class=\"wp-image-2165\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter.jpg 805w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-300x152.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-768x389.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-600x304.jpg 600w\" sizes=\"(max-width: 805px) 100vw, 805px\" \/><\/figure>\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\/explosion-proof-pressure-transmitter\/#1-design-philosophy-and-safety-considerations\" >1. Tri\u1ebft l\u00fd thi\u1ebft k\u1ebf v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 an to\u00e0n<\/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\/explosion-proof-pressure-transmitter\/#2-structural-and-material-differences\" >2. S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 v\u1eadt li\u1ec7u<\/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\/explosion-proof-pressure-transmitter\/#3-technical-differences-in-working-principle\" >3. S\u1ef1 kh\u00e1c bi\u1ec7t k\u1ef9 thu\u1eadt trong nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<\/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\/explosion-proof-pressure-transmitter\/#4-certification-standards\" >4. Ti\u00eau chu\u1ea9n ch\u1ee9ng nh\u1eadn<\/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\/explosion-proof-pressure-transmitter\/#5-application-scenarios\" >5. C\u00e1c tr\u01b0\u1eddng h\u1ee3p \u1ee9ng d\u1ee5ng<\/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\/explosion-proof-pressure-transmitter\/#6-conclusion\" >6. K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-4eaa747145bf9e7cdafd1051526375fb\" id=\"h-1-design-philosophy-and-safety-considerations\"><span class=\"ez-toc-section\" id=\"1-design-philosophy-and-safety-considerations\"><\/span>1. Tri\u1ebft l\u00fd thi\u1ebft k\u1ebf v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 an to\u00e0n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-1-purpose-of-explosion-proof-pressure-transmitters\">1-1. M\u1ee5c \u0111\u00edch c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5<\/h3>\n\n\n\n<p>C\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho c\u00e1c m\u00f4i tr\u01b0\u1eddng nguy hi\u1ec3m c\u00f3 s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a kh\u00ed d\u1ec5 ch\u00e1y (v\u00ed d\u1ee5: metan, hydro), h\u01a1i ho\u1eb7c b\u1ee5i d\u1ec5 ch\u00e1y. M\u1ee5c ti\u00eau ch\u00ednh c\u1ee7a ch\u00fang l\u00e0 ho\u1ea1t \u0111\u1ed9ng an to\u00e0n m\u00e0 kh\u00f4ng g\u00e2y ra c\u00e1c v\u1ee5 n\u1ed5.<br>V\u00ed d\u1ee5, trong c\u00e1c nh\u00e0 m\u00e1y l\u1ecdc d\u1ea7u ho\u1eb7c h\u1ec7 th\u1ed1ng th\u00f4ng gi\u00f3 c\u1ee7a m\u1ecf than, ngay c\u1ea3 m\u1ed9t tia l\u1eeda \u0111i\u1ec7n nh\u1ecf ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao c\u0169ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u1eadu qu\u1ea3 th\u1ea3m kh\u1ed1c. Do \u0111\u00f3, c\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 kh\u00f4ng ch\u1ec9 ph\u1ea3i \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u \u0111o \u00e1p su\u1ea5t m\u00e0 c\u00f2n ph\u1ea3i ng\u0103n ch\u1eb7n s\u1ef1 lan truy\u1ec1n c\u1ee7a v\u1ee5 n\u1ed5.<br>C\u00e1c thi\u1ebft k\u1ebf ch\u1ed1ng ch\u00e1y n\u1ed5 th\u01b0\u1eddng tu\u00e2n theo hai nguy\u00ean t\u1eafc:<br>Ch\u1ed1ng ch\u00e1y n\u1ed5 (Ch\u1ed1ng n\u1ed5, Ex d) \u2013 Bao b\u1ecdc c\u00e1c ngu\u1ed3n g\u00e2y ch\u00e1y n\u1ed5 ti\u1ec1m \u1ea9n trong m\u1ed9t v\u1ecf b\u1ecdc ch\u1eafc ch\u1eafn, ng\u0103n ch\u1eb7n c\u00e1c v\u1ee5 n\u1ed5 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng b\u00ean ngo\u00e0i.<br>An to\u00e0n n\u1ed9i t\u1ea1i (Ex i) \u2013 H\u1ea1n ch\u1ebf d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p \u0111\u1ec3 ng\u0103n ch\u1eb7n m\u1ee9c n\u0103ng l\u01b0\u1ee3ng \u0111\u1ea1t \u0111\u1ebfn ng\u01b0\u1ee1ng g\u00e2y ch\u00e1y, ngay c\u1ea3 trong \u0111i\u1ec1u ki\u1ec7n s\u1ef1 c\u1ed1.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-2-purpose-of-general-pressure-transmitters\">1-2. M\u1ee5c \u0111\u00edch c\u1ee7a c\u00e1c c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t th\u00f4ng d\u1ee5ng<\/h3>\n\n\n\n<p>Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t th\u00f4ng th\u01b0\u1eddng t\u1eadp trung v\u00e0o hi\u1ec7u qu\u1ea3 chi ph\u00ed v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u00f4i tr\u01b0\u1eddng kh\u00f4ng c\u00f3 nguy c\u01a1 n\u1ed5 nh\u01b0 nh\u00e0 m\u00e1y x\u1eed l\u00fd n\u01b0\u1edbc, h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed ho\u1eb7c x\u01b0\u1edfng c\u01a1 kh\u00ed. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p ti\u00eau chu\u1ea9n m\u00e0 kh\u00f4ng c\u1ea7n xem x\u00e9t c\u00e1c y\u00eau c\u1ea7u ch\u1ed1ng n\u1ed5.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-1-3-impact-of-safety-differences\"><strong>1-3. T\u00e1c \u0111\u1ed9ng c\u1ee7a s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 an to\u00e0n<\/strong><\/h3>\n\n\n\n<p>Do c\u00f3 tri\u1ebft l\u00fd thi\u1ebft k\u1ebf kh\u00e1c bi\u1ec7t, c\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 y\u00eau c\u1ea7u c\u00e1c bi\u1ec7n ph\u00e1p an to\u00e0n nghi\u00eam ng\u1eb7t h\u01a1n nhi\u1ec1u so v\u1edbi c\u00e1c m\u00f4 h\u00ecnh th\u00f4ng th\u01b0\u1eddng. V\u00ed d\u1ee5, m\u1ecdi th\u00e0nh ph\u1ea7n m\u1ea1ch trong m\u00f4 h\u00ecnh ch\u1ed1ng ch\u00e1y n\u1ed5 (Ex d) \u0111\u1ec1u ph\u1ea3i tr\u1ea3i qua c\u00e1c b\u00e0i ki\u1ec3m tra nghi\u00eam ng\u1eb7t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u00fang kh\u00f4ng th\u1ec3 tr\u1edf th\u00e0nh ngu\u1ed3n g\u00e2y ch\u00e1y n\u1ed5. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t th\u00f4ng th\u01b0\u1eddng \u01b0u ti\u00ean \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc (v\u00ed d\u1ee5: kh\u1ea3 n\u0103ng ch\u1ecbu \u00e1p su\u1ea5t v\u00e0 ch\u1ed1ng \u0103n m\u00f2n) h\u01a1n l\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u00e1y n\u1ed5.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-a873e5231fde2ec469416c227369ddd3\" id=\"h-2-structural-and-material-differences\"><span class=\"ez-toc-section\" id=\"2-structural-and-material-differences\"><\/span>2. S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 c\u1ea5u tr\u00fac v\u00e0 v\u1eadt li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-1-structural-features-of-explosion-proof-pressure-transmitters\">2-1. C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u t\u1ea1o c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5<\/h3>\n\n\n\n<p>C\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u1edbi c\u1ea5u tr\u00fac c\u00f3 \u0111\u1ed9 b\u1ec1n cao v\u00e0 kh\u1ea3 n\u0103ng k\u00edn kh\u00edt tuy\u1ec7t \u0111\u1ed1i. V\u1ecf c\u1ee7a ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb th\u00e9p kh\u00f4ng g\u1ec9 (v\u00ed d\u1ee5: 316L) ho\u1eb7c h\u1ee3p kim nh\u00f4m, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c c\u00e1c v\u1ee5 n\u1ed5 b\u00ean trong. M\u1ed9t s\u1ed1 model (v\u00ed d\u1ee5: D\u00f2ng SJ MS, D\u00f2ng Emerson 3051) c\u00f3 v\u1ecf ch\u1ed1ng ch\u00e1y n\u1ed5, gi\u00fap ng\u0103n ch\u1eb7n b\u1ea5t k\u1ef3 ngu\u1ed3n g\u00e2y ch\u00e1y n\u1ed5 ti\u1ec1m \u1ea9n n\u00e0o.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-1-1024x768.png\" alt=\"\" class=\"wp-image-2167\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-1-1024x768.png 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-1-300x225.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-1-768x576.png 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-1-600x450.png 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-1.png 1477w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>M\u1ee9c \u0111\u1ed9 ch\u1ed1ng th\u1ea5m c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb n\u00e0y th\u01b0\u1eddng \u0111\u1ea1t t\u1eeb IP65 \u0111\u1ebfn IP68, gi\u00fap ng\u0103n ch\u1eb7n hi\u1ec7u qu\u1ea3 s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a kh\u00ed ho\u1eb7c b\u1ee5i t\u1eeb b\u00ean ngo\u00e0i. Ngo\u00e0i ra, c\u00e1c m\u00f4 h\u00ecnh ch\u1ed1ng ch\u00e1y n\u1ed5 s\u1eed d\u1ee5ng c\u00e1c th\u00e0nh ph\u1ea7n k\u1ebft n\u1ed1i chuy\u00ean d\u1ee5ng nh\u01b0 \u1ed1ng n\u1ed1i c\u00e1p ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 k\u00edn kh\u00ed.<br>B\u00ean trong, c\u00e1c b\u1ed9 truy\u1ec1n t\u00edn hi\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c trang b\u1ecb c\u00e1c t\u00ednh n\u0103ng nh\u01b0 m\u00e0ng c\u00e1ch ly, l\u1edbp ph\u1ee7 ch\u1ed1ng t\u0129nh \u0111i\u1ec7n v\u00e0 m\u00f4-\u0111un gi\u1edbi h\u1ea1n n\u0103ng l\u01b0\u1ee3ng \u0111\u1ec3 ng\u0103n ch\u1eb7n tia l\u1eeda nguy hi\u1ec3m ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 cao trong \u0111i\u1ec1u ki\u1ec7n \u00e1p su\u1ea5t cao ho\u1eb7c s\u1ef1 c\u1ed1.<\/p>\n\n\n\n<p>(\u0110\u1ecdc th\u00eam:&nbsp;<a href=\"https:\/\/www.sj-gauge.com\/vi\/product-category\/pressure-instruments\/pressure-sensors\/\" target=\"_blank\" rel=\"noreferrer noopener\">C\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t (B\u1ed9 chuy\u1ec3n \u0111\u1ed5i\/B\u1ed9 truy\u1ec1n t\u00edn hi\u1ec7u)<\/a>)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-2-structural-features-of-general-pressure-transmitters\">2.2 C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac c\u1ee7a b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t t\u1ed5ng qu\u00e1t<\/h3>\n\n\n\n<p>C\u00e1c c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t th\u00f4ng d\u1ee5ng c\u00f3 nhi\u1ec1u l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u linh ho\u1ea1t h\u01a1n, bao g\u1ed3m nh\u1ef1a (v\u00ed d\u1ee5: polycarbonate) ho\u1eb7c v\u1ecf kim lo\u1ea1i ti\u00eau chu\u1ea9n, v\u1edbi y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng k\u00edn kh\u00edt th\u1ea5p h\u01a1n. V\u00ed d\u1ee5, v\u1ecf nh\u1ef1a \u0111\u1ee7 d\u00f9ng cho c\u00e1c \u1ee9ng d\u1ee5ng \u00e1p su\u1ea5t th\u1ea5p, trong khi v\u1ecf th\u00e9p kh\u00f4ng g\u1ec9 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u00f4i tr\u01b0\u1eddng \u00e1p su\u1ea5t trung b\u00ecnh. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y th\u01b0\u1eddng \u0111\u00e1p \u1ee9ng ti\u00eau chu\u1ea9n IP54 \u0111\u1ebfn IP65 v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng b\u1ee5i v\u00e0 n\u01b0\u1edbc, nh\u01b0ng kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u00e1y n\u1ed5.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-medium is-resized\"><img decoding=\"async\" width=\"189\" height=\"300\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-rosemount-189x300.jpg\" alt=\"\" class=\"wp-image-2168\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-rosemount-189x300.jpg 189w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-rosemount-646x1024.jpg 646w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-rosemount-300x475.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-rosemount-600x951.jpg 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-rosemount.jpg 652w\" sizes=\"(max-width: 189px) 100vw, 189px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-3-impact-of-material-and-structure-on-performance\">2.3 \u1ea2nh h\u01b0\u1edfng c\u1ee7a v\u1eadt li\u1ec7u v\u00e0 c\u1ea5u tr\u00fac \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t<\/h3>\n\n\n\n<p>C\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 cung c\u1ea5p \u0111\u1ed9 b\u1ec1n cao h\u01a1n trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t (v\u00ed d\u1ee5: nhi\u1ec7t \u0111\u1ed9 cao, \u0111\u1ed9 \u1ea9m cao ho\u1eb7c kh\u00ed \u0103n m\u00f2n) nh\u01b0ng c\u00f3 chi ph\u00ed cao h\u01a1n. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t th\u00f4ng th\u01b0\u1eddng c\u00f3 thi\u1ebft k\u1ebf nh\u1eb9, d\u1ec5 l\u1eafp \u0111\u1eb7t v\u00e0 thay th\u1ebf nh\u01b0ng c\u00f3 th\u1ec3 c\u00f3 \u0111\u1ed9 b\u1ec1n th\u1ea5p h\u01a1n trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t.<\/p>\n\n\n\n<p>(\u0110\u1ecdc th\u00eam:&nbsp;<a href=\"https:\/\/www.sj-gauge.com\/vi\/blog\/metal-connector-corrosion-chart\/\" target=\"_blank\" rel=\"noreferrer noopener\">B\u1ea3ng kh\u00e1ng \u0103n m\u00f2n cho \u0111\u1ed3ng h\u1ed3 \u00e1p su\u1ea5t c\u00f3 k\u1ebft n\u1ed1i kim lo\u1ea1i<\/a>)<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-a35383ce8aaf6ec8910c4862d5b666d9\" id=\"h-3-technical-differences-in-working-principle\"><span class=\"ez-toc-section\" id=\"3-technical-differences-in-working-principle\"><\/span>3. S\u1ef1 kh\u00e1c bi\u1ec7t k\u1ef9 thu\u1eadt trong nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-1-working-principle-of-explosion-proof-pressure-transmitters\">3-1. Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5<\/h3>\n\n\n\n<p>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 v\u1ec1 c\u01a1 b\u1ea3n gi\u1ed1ng v\u1edbi nguy\u00ean l\u00fd c\u1ee7a m\u1eabu ti\u00eau chu\u1ea9n: n\u00f3 chuy\u1ec3n \u0111\u1ed5i \u00e1p su\u1ea5t th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n th\u00f4ng qua m\u1ed9t b\u1ed9 ph\u1eadn c\u1ea3m bi\u1ebfn. Tuy nhi\u00ean, \u0111i\u1ec3m kh\u00e1c bi\u1ec7t c\u1ee7a n\u00f3 n\u1eb1m \u1edf vi\u1ec7c t\u00edch h\u1ee3p c\u00f4ng ngh\u1ec7 ch\u1ed1ng ch\u00e1y n\u1ed5.<br>V\u00ed d\u1ee5, \u0111\u1ed1i v\u1edbi lo\u1ea1i ch\u1ed1ng ch\u00e1y n\u1ed5, v\u1ecf thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t do v\u1ee5 n\u1ed5 b\u00ean trong t\u1ea1o ra v\u00e0 ng\u0103n ch\u1eb7n nhi\u1ec7t ho\u1eb7c ng\u1ecdn l\u1eeda th\u00f4ng qua c\u00e1c \u0111\u01b0\u1eddng d\u1eabn chuy\u00ean d\u1ee5ng (ch\u1eb3ng h\u1ea1n nh\u01b0 b\u1ed9 ng\u0103n l\u1eeda).<br>Ng\u01b0\u1ee3c l\u1ea1i, lo\u1ea1i an to\u00e0n n\u1ed9i t\u1ea1i h\u1ea1n ch\u1ebf n\u0103ng l\u01b0\u1ee3ng \u0111\u1ea7u ra th\u00f4ng qua thi\u1ebft k\u1ebf m\u1ea1ch \u2014 v\u00ed d\u1ee5 nh\u01b0 s\u1eed d\u1ee5ng \u0111i\u1ed1t Zener ho\u1eb7c \u0111i\u1ec7n tr\u1edf gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n \u2014 \u0111\u1ec3 duy tr\u00ec \u0111i\u1ec7n \u00e1p v\u00e0 d\u00f2ng \u0111i\u1ec7n trong ph\u1ea1m vi an to\u00e0n (th\u01b0\u1eddng d\u01b0\u1edbi 1W).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-2-working-principle-of-general-pressure-transmitters\">3.2 Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t t\u1ed5ng qu\u00e1t<\/h3>\n\n\n\n<p>C\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t th\u00f4ng th\u01b0\u1eddng ch\u1ec9 \u0111o \u00e1p su\u1ea5t v\u00e0 chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n. V\u00ed d\u1ee5, c\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t piezoresistive s\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng piezoresistive c\u1ee7a tinh th\u1ec3 silicon \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1ef1 thay \u0111\u1ed5i \u00e1p su\u1ea5t, chuy\u1ec3n \u0111\u1ed5i s\u1ef1 bi\u1ebfn \u0111\u1ed5i \u0111i\u1ec7n tr\u1edf th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n \u00e1p th\u00f4ng qua c\u1ea7u Wheatstone. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y kh\u00f4ng y\u00eau c\u1ea7u c\u00e1c bi\u1ec7n ph\u00e1p h\u1ea1n ch\u1ebf n\u0103ng l\u01b0\u1ee3ng ho\u1eb7c b\u1ea3o v\u1ec7 ch\u1ed1ng tia l\u1eeda.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-3-complexity-of-technical-implementation\">3-3. M\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p trong vi\u1ec7c tri\u1ec3n khai k\u1ef9 thu\u1eadt<\/h3>\n\n\n\n<p>C\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 y\u00eau c\u1ea7u c\u00e1c c\u00f4ng ngh\u1ec7 b\u1ed5 sung, ch\u1eb3ng h\u1ea1n nh\u01b0 r\u00e0o c\u1ea3n an to\u00e0n (Ex i) ho\u1eb7c th\u1eed nghi\u1ec7m ch\u1ed1ng ch\u00e1y n\u1ed5 nghi\u00eam ng\u1eb7t (Ex d), khi\u1ebfn qu\u00e1 tr\u00ecnh thi\u1ebft k\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t c\u1ee7a ch\u00fang tr\u1edf n\u00ean ph\u1ee9c t\u1ea1p h\u01a1n. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t th\u00f4ng th\u01b0\u1eddng tu\u00e2n theo quy tr\u00ecnh s\u1ea3n xu\u1ea5t ti\u00eau chu\u1ea9n v\u1edbi \u00edt h\u1ea1n ch\u1ebf an to\u00e0n h\u01a1n.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-2-768x1024.jpg\" alt=\"\" class=\"wp-image-2169\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-2-768x1023.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-2-225x300.jpg 225w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-2-1153x1536.jpg 1153w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-2-300x400.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-2-600x800.jpg 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-explosion-proof-2.jpg 1500w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-612c46f8543c82a7478e3592007eac4d\" id=\"h-4-certification-standards\"><span class=\"ez-toc-section\" id=\"4-certification-standards\"><\/span>4. Ti\u00eau chu\u1ea9n ch\u1ee9ng nh\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-1-explosion-proof-pressure-transmitter-certifications\">4-1. Ch\u1ee9ng nh\u1eadn cho c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5<\/h3>\n\n\n\n<p>C\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n an to\u00e0n qu\u1ed1c t\u1ebf ho\u1eb7c khu v\u1ef1c, bao g\u1ed3m:<br>ATEX (Ch\u00e2u \u00c2u) \u2013 X\u00e1c \u0111\u1ecbnh c\u00e1c ph\u00e2n lo\u1ea1i khu v\u1ef1c nguy hi\u1ec3m v\u00e0 lo\u1ea1i kh\u00ed.<br>IECEx (To\u00e0n c\u1ea7u) \u2013 H\u1ec7 th\u1ed1ng ch\u1ee9ng nh\u1eadn ch\u1ed1ng ch\u00e1y n\u1ed5 to\u00e0n c\u1ea7u.<br>FM\/UL (Hoa K\u1ef3) \u2013 Ch\u1ee9ng nh\u1eadn cho th\u1ecb tr\u01b0\u1eddng B\u1eafc M\u1ef9.<br>C\u00e1c ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh c\u00e1c m\u1ee9c \u0111\u00e1nh gi\u00e1 an to\u00e0n (v\u00ed d\u1ee5: Ex d IIC T4) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng an to\u00e0n trong \u0111i\u1ec1u ki\u1ec7n nguy hi\u1ec3m.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-2-general-pressure-transmitter-standards\">4-2. C\u00e1c ti\u00eau chu\u1ea9n chung v\u1ec1 c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t<\/h3>\n\n\n\n<p>C\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t t\u1ed5ng qu\u00e1t ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh c\u00f4ng nghi\u1ec7p c\u01a1 b\u1ea3n nh\u01b0 CE (Tu\u00e2n th\u1ee7 Ch\u00e2u \u00c2u) v\u00e0 ISO 9001 (Qu\u1ea3n l\u00fd ch\u1ea5t l\u01b0\u1ee3ng), t\u1eadp trung v\u00e0o hi\u1ec7u su\u1ea5t thay v\u00ec an to\u00e0n ch\u1ed1ng n\u1ed5.<\/p>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-91b8fef296df0e63c0abe2406331c052\" id=\"h-5-application-scenarios\"><span class=\"ez-toc-section\" id=\"5-application-scenarios\"><\/span>5. C\u00e1c tr\u01b0\u1eddng h\u1ee3p \u1ee9ng d\u1ee5ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-1-where-explosion-proof-pressure-transmitters-are-used\">5-1. C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5<\/h3>\n\n\n\n<p>C\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p y\u00eau c\u1ea7u s\u1eed d\u1ee5ng b\u1ed9 truy\u1ec1n t\u00edn hi\u1ec7u ch\u1ed1ng ch\u00e1y n\u1ed5 bao g\u1ed3m:<br>D\u1ea7u kh\u00ed \u2013 Gi\u00e1m s\u00e1t \u00e1p su\u1ea5t t\u1ea1i gi\u1ebfng d\u1ea7u v\u00e0 \u0111\u01b0\u1eddng \u1ed1ng.<br>Nh\u00e0 m\u00e1y h\u00f3a ch\u1ea5t \u2013 \u0110o \u00e1p su\u1ea5t b\u1ed3n ph\u1ea3n \u1ee9ng v\u00e0 b\u1ed3n ch\u1ee9a.<br>Khai th\u00e1c m\u1ecf \u2013 Gi\u00e1m s\u00e1t \u00e1p su\u1ea5t kh\u00ed \u0111\u1ec3 ph\u00f2ng ng\u1eeba n\u1ed5.<br>D\u01b0\u1ee3c ph\u1ea9m \u2013 \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng dung m\u00f4i d\u1ec5 bay h\u01a1i.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-2-where-general-pressure-transmitters-are-used\">5-2. C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ea3m bi\u1ebfn \u00e1p su\u1ea5t th\u00f4ng d\u1ee5ng<\/h3>\n\n\n\n<p>C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<br>X\u1eed l\u00fd n\u01b0\u1edbc \u2013 Gi\u00e1m s\u00e1t \u00e1p su\u1ea5t b\u01a1m v\u00e0 \u0111\u01b0\u1eddng \u1ed1ng.<br>H\u1ec7 th\u1ed1ng HVAC \u2013 \u0110o \u00e1p su\u1ea5t kh\u00f4ng kh\u00ed ho\u1eb7c \u1ed1ng d\u1eabn.<br>Ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m \u2013 Ki\u1ec3m so\u00e1t \u00e1p su\u1ea5t trong c\u00e1c quy tr\u00ecnh \u00e9p ho\u1eb7c \u0111\u00f3ng g\u00f3i.<br>S\u1ea3n xu\u1ea5t c\u01a1 kh\u00ed \u2013 Gi\u00e1m s\u00e1t h\u1ec7 th\u1ed1ng th\u1ee7y l\u1ef1c v\u00e0 kh\u00ed n\u00e9n.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-intrinsic-safety-768x1024.jpg\" alt=\"\" class=\"wp-image-2170\" style=\"width:300px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-intrinsic-safety-768x1023.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-intrinsic-safety-225x300.jpg 225w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-intrinsic-safety-1153x1536.jpg 1153w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-intrinsic-safety-300x400.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-intrinsic-safety-600x800.jpg 600w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/11\/SJ-Gauge-blog-pressure-transmitter-intrinsic-safety.jpg 1500w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-769891b387633ad7bf62346269d21f07\" id=\"h-6-conclusion\"><span class=\"ez-toc-section\" id=\"6-conclusion\"><\/span>6. K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>C\u00e1c b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 \u01b0u ti\u00ean an to\u00e0n trong m\u00f4i tr\u01b0\u1eddng nguy hi\u1ec3m, \u0111\u01b0\u1ee3c trang b\u1ecb v\u1ecf b\u1ecdc ch\u1eafc ch\u1eafn, m\u1ea1ch \u0111i\u1ec7n chuy\u00ean d\u1ee5ng v\u00e0 c\u00e1c ch\u1ee9ng nh\u1eadn nghi\u00eam ng\u1eb7t. C\u00e1c m\u00f4 h\u00ecnh th\u00f4ng d\u1ee5ng t\u1eadp trung v\u00e0o hi\u1ec7u qu\u1ea3 chi ph\u00ed v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111o l\u01b0\u1eddng cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p ti\u00eau chu\u1ea9n.<br>Vi\u1ec7c l\u1ef1a ch\u1ecdn b\u1ed9 ph\u00e1t ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o r\u1ee7i ro m\u00f4i tr\u01b0\u1eddng: n\u1ebfu c\u00f3 kh\u00ed d\u1ec5 ch\u00e1y ho\u1eb7c b\u1ee5i, c\u1ea7n s\u1eed d\u1ee5ng m\u00f4 h\u00ecnh ch\u1ed1ng ch\u00e1y n\u1ed5. Trong tr\u01b0\u1eddng h\u1ee3p kh\u00e1c, m\u00f4 h\u00ecnh th\u00f4ng th\u01b0\u1eddng l\u00e0 l\u1ef1a ch\u1ecdn kinh t\u1ebf h\u01a1n.<\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t ph\u00f9 h\u1ee3p cho m\u1ed9t \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3? B\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb c\u1ea3m bi\u1ebfn c\u00f4ng nghi\u1ec7p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111o \u00e1p su\u1ea5t c\u1ee7a kh\u00ed, ch\u1ea5t l\u1ecfng ho\u1eb7c h\u01a1i n\u01b0\u1edbc v\u00e0 chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh t\u00edn hi\u1ec7u \u0111i\u1ec7n ti\u00eau chu\u1ea9n (v\u00ed d\u1ee5: 4-20mA, 0-10V). Tuy nhi\u00ean, c\u00e1c m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c kh\u00e1c nhau \u0111\u1eb7t ra nh\u1eefng y\u00eau c\u1ea7u ri\u00eang bi\u1ec7t \u0111\u1ed1i v\u1edbi b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t. B\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t ch\u1ed1ng ch\u00e1y n\u1ed5 v\u00e0 b\u1ed9 truy\u1ec1n \u00e1p su\u1ea5t th\u00f4ng th\u01b0\u1eddng [\u2026]<\/p>","protected":false},"author":2,"featured_media":2165,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[71],"class_list":["post-2164","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-pressure"],"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 an Explosion-Proof Pressure Transmitter? A Comprehensive Guide to Key Technologies and Applications - 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\/explosion-proof-pressure-transmitter\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is an Explosion-Proof Pressure Transmitter? A Comprehensive Guide to Key Technologies and Applications\" \/>\n<meta property=\"og:description\" content=\"How to Choose the Right Pressure Transmitter for a Specific Application? A pressure transmitter is a widely used industrial sensing device designed to measure the pressure of gases, liquids, or steam and convert it into a standard electrical signal (e.g., 4-20mA, 0-10V).However, different working environments impose distinct requirements on pressure transmitters. 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