{"id":2370,"date":"2023-05-17T11:35:08","date_gmt":"2023-05-17T03:35:08","guid":{"rendered":"https:\/\/sj-gauge.com\/?p=2370"},"modified":"2026-04-13T13:03:08","modified_gmt":"2026-04-13T05:03:08","slug":"bimetal-vs-gas-thermometers","status":"publish","type":"post","link":"https:\/\/www.sj-gauge.com\/ja\/bimetal-vs-gas-thermometers\/","title":{"rendered":"\u30d0\u30a4\u30e1\u30bf\u30eb\u6e29\u5ea6\u8a08\u3068\u30ac\u30b9\u81a8\u5f35\u5f0f\u6e29\u5ea6\u8a08\u306e\u9055\u3044\u306f\uff1f"},"content":{"rendered":"<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u5de5\u696d\u7528\u6e29\u5ea6\u8a08\u306b\u306f\u591a\u304f\u306e\u7a2e\u985e\u304c\u3042\u308b\u3002\u305d\u306e\u4e2d\u3067\u3082\u4e00\u822c\u7684\u306a\u306e\u306f\u30d0\u30a4\u30e1\u30bf\u30eb\u5f0f\u3068\u30ac\u30b9\u81a8\u5f35\u5f0f\u3067\u3042\u308b\u3002\u3057\u304b\u3057\u3001\u3053\u308c\u3089\u306e\u6e29\u5ea6\u8a08\u306e\u9577\u6240\u3068\u77ed\u6240\u306b\u3064\u3044\u3066\u3088\u304f\u6df7\u4e71\u3057\u3066\u3044\u308b\u4eba\u304c\u3044\u308b\u3002\u305d\u3053\u3067\u3001\u3053\u308c\u3089\u306e\u6e29\u5ea6\u8a08\u306e\u9055\u3044\u3092\u898b\u3066\u307f\u3088\u3046\u3002.<\/p>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"677\" height=\"532\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/01_SJ_bimetal_thermometer_gas-actuated_thermometer.png\" alt=\"\" class=\"wp-image-2371\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/01_SJ_bimetal_thermometer_gas-actuated_thermometer.png 677w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/01_SJ_bimetal_thermometer_gas-actuated_thermometer-300x236.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/01_SJ_bimetal_thermometer_gas-actuated_thermometer-600x471.png 600w\" sizes=\"(max-width: 677px) 100vw, 677px\" \/><\/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\">\u76ee\u6b21<\/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=\"\u30c8\u30b0\u30eb\u76ee\u6b21\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u30c8\u30b0\u30eb<\/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\/ja\/bimetal-vs-gas-thermometers\/#1-bimetal-thermometer\" >1.\u30d0\u30a4\u30e1\u30bf\u30eb\u6e29\u5ea6\u8a08<\/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\/ja\/bimetal-vs-gas-thermometers\/#2-gas-expansion-thermometer\" >2.\u30ac\u30b9\u81a8\u5f35\u6e29\u5ea6\u8a08<\/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\/ja\/bimetal-vs-gas-thermometers\/#4-still-unclear-click-the-video-below-or-contact-us\" >4.\u307e\u3060\u4e0d\u660e\u306a\u70b9\u304c\u3042\u308a\u307e\u3059\u304b\uff1f\u4e0b\u306e\u30d3\u30c7\u30aa\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u304b\u3001\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044\uff01<\/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\/ja\/bimetal-vs-gas-thermometers\/#5-summary\" >5.\u6982\u8981<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-c604247272d09666d64761a6c69e3620\"><span class=\"ez-toc-section\" id=\"1-bimetal-thermometer\"><\/span>1.\u30d0\u30a4\u30e1\u30bf\u30eb\u6e29\u5ea6\u8a08<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u30d0\u30a4\u30e1\u30bf\u30eb\u6e29\u5ea6\u8a08\u306f\u30012\u7a2e\u985e\u306e\u91d1\u5c5e\u3092\u8cbc\u308a\u5408\u308f\u305b\u3066\u4f5c\u3089\u308c\u3066\u3044\u308b\u3002\u305d\u308c\u305e\u308c\u306e\u91d1\u5c5e\u306f\u52a0\u71b1\u3055\u308c\u308b\u3068\u7570\u306a\u308b\u901f\u5ea6\u3067\u81a8\u5f35\u3057\u3001\u3053\u306e\u5dee\u3092\u6e2c\u5b9a\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u6e29\u5ea6\u3092\u6e2c\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4e00\u822c\u7684\u306b\u306f\u3001\u91d1\u5c5e\u677f\u3092\u30b3\u30a4\u30eb\u72b6\u306b\u3057\u3066\u3001\u300c\u81ea\u7531\u7aef\u300d\u3092\u6307\u91dd\u8ef8\u306b\u63a5\u7d9a\u3057\u3001\u300c\u56fa\u5b9a\u7aef\u300d\u3092\u6e29\u5ea6\u8a08\u306b\u53d6\u308a\u4ed8\u3051\u308b\u3002\u6e29\u5ea6\u304c\u4e0a\u304c\u308b\u3068\u81ea\u7531\u7aef\u306e\u91d1\u5c5e\u306f\u4e00\u65b9\u5411\u306b\u56de\u8ee2\u3057\u3001\u6e29\u5ea6\u304c\u4e0b\u304c\u308b\u3068\u53cd\u5bfe\u65b9\u5411\u306b\u56de\u8ee2\u3059\u308b\u3002\u30b3\u30a4\u30eb\u304c\u66f2\u304c\u308b\u3068\u3001\u81ea\u7531\u7aef\u304c\u6307\u91dd\u3092\u5236\u5fa1\u3059\u308b\u3002.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"736\" height=\"515\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/02_SJ_bimetal_thermometer_temperature.png\" alt=\"\" class=\"wp-image-2372\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/02_SJ_bimetal_thermometer_temperature.png 736w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/02_SJ_bimetal_thermometer_temperature-300x210.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/02_SJ_bimetal_thermometer_temperature-600x420.png 600w\" sizes=\"(max-width: 736px) 100vw, 736px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"724\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/\u6280\u8853\u7814\u8a0e\u96d9\u91d1\u5c6cEN-1024x724.jpg\" alt=\"\" class=\"wp-image-2374\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/\u6280\u8853\u7814\u8a0e\u96d9\u91d1\u5c6cEN-1024x724.jpg 1024w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/\u6280\u8853\u7814\u8a0e\u96d9\u91d1\u5c6cEN-300x212.jpg 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/\u6280\u8853\u7814\u8a0e\u96d9\u91d1\u5c6cEN-768x543.jpg 768w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/\u6280\u8853\u7814\u8a0e\u96d9\u91d1\u5c6cEN-1536x1086.jpg 1536w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/\u6280\u8853\u7814\u8a0e\u96d9\u91d1\u5c6cEN-2048x1448.jpg 2048w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/\u6280\u8853\u7814\u8a0e\u96d9\u91d1\u5c6cEN-600x424.jpg 600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u30e1\u30ea\u30c3\u30c8<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b3\u30b9\u30c8\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u512a\u308c\u305f\u30b7\u30f3\u30d7\u30eb\u306a\u69cb\u9020<\/li>\n\n\n\n<li>\u7d50\u679c\u306f\u5468\u56f2\u6e29\u5ea6\u306b\u5f71\u97ff\u3055\u308c\u306a\u3044<\/li>\n\n\n\n<li>\u5e83\u3044\u6e29\u5ea6\u7bc4\u56f2\u9650\u754c -70\u00b0C ~ 600\u00b0C<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c7\u30e1\u30ea\u30c3\u30c8<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9577\u3044\u5fdc\u7b54\u6642\u9593<\/li>\n\n\n\n<li>\u30aa\u30d6\u30b6\u30fc\u30d0\u30fc\u306f\u6e2c\u5b9a\u30dd\u30a4\u30f3\u30c8\u306e\u8fd1\u304f\u306b\u3044\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-6b97a7357a3448e9a73d5f2ef5f18a80\"><span class=\"ez-toc-section\" id=\"2-gas-expansion-thermometer\"><\/span>2.\u30ac\u30b9\u81a8\u5f35\u6e29\u5ea6\u8a08<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u30ac\u30b9\u81a8\u5f35\u5f0f\u6e29\u5ea6\u8a08\u306f\u30ac\u30b9\u4f5c\u52d5\u5f0f\u6e29\u5ea6\u8a08\u3068\u3082\u547c\u3070\u308c\u3001\u30ac\u30b9\u81a8\u5f35\u306e\u539f\u7406\u3092\u5229\u7528\u3057\u3066\u6e29\u5ea6\u3092\u6e2c\u5b9a\u3059\u308b\u3002\u4e00\u822c\u7684\u306b\u306f\u30d8\u30ea\u30a6\u30e0\uff08He\uff09\u304c\u63a8\u5968\u3055\u308c\u3066\u3044\u308b\u3002\u6e29\u5ea6\u304c\u4e0a\u6607\u3059\u308b\u3068\u3001\u6e29\u5ea6\u8a08\u5185\u306e\u30ac\u30b9\u304c\u81a8\u5f35\u3057\u3001\u30c1\u30e5\u30fc\u30d6\u5185\u306e\u5727\u529b\u304c\u5909\u5316\u3059\u308b\u3002\u3053\u306e\u5727\u529b\u304c\u6307\u91dd\u3092\u52d5\u304b\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"687\" height=\"487\" src=\"https:\/\/sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_gas-actuated_thermometer.png\" alt=\"\" class=\"wp-image-2375\" style=\"width:500px\" srcset=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_gas-actuated_thermometer.png 687w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_gas-actuated_thermometer-300x213.png 300w, https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/04_SJ_gas-actuated_thermometer-600x425.png 600w\" sizes=\"(max-width: 687px) 100vw, 687px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u30e1\u30ea\u30c3\u30c8<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30b7\u30e7\u30fc\u30c8\u30c7\u30a3\u30ec\u30a4<\/li>\n\n\n\n<li>\u5e83\u3044\u6e29\u5ea6\u7bc4\u56f2\u9650\u754c -200\u00b0C ~ 700\u00b0C<\/li>\n\n\n\n<li>\u30ad\u30e3\u30d4\u30e9\u30ea\u30fc\u30c1\u30e5\u30fc\u30d6(60m)\u3092\u4ecb\u3057\u3001\u6e2c\u5b9a\u70b9\u304b\u3089\u96e2\u308c\u305f\u5834\u6240\u3067\u3082\u89b3\u6e2c\u53ef\u80fd(A\u70b9\u6e2c\u5b9a\u3001B\u70b9\u89b3\u6e2c)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c7\u30e1\u30ea\u30c3\u30c8<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30ac\u30b9\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u8907\u96d1\u306a\u69cb\u9020\u306b\u3088\u308b\u9ad8\u4fa1\u683c<\/li>\n\n\n\n<li>\u7d50\u679c\u306f\u5468\u56f2\u6e29\u5ea6\u306e\u5f71\u97ff\u3092\u53d7\u3051\u308b<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-131167d48f235b96b167df9fcc881398\">3.\u6e29\u5ea6\u8a08\u6bd4\u8f03\u8868\uff08\u4e00\u76ee\u77ad\u7136\uff09<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><\/td><td>\u30d0\u30a4\u30e1\u30bf\u30eb\u6e29\u5ea6\u8a08<\/td><td>\u30ac\u30b9\u81a8\u5f35\u6e29\u5ea6\u8a08<br>(\u30ac\u30b9\u4f5c\u52d5\u6e29\u5ea6\u8a08\uff09<\/td><\/tr><tr><td>\u6e29\u5ea6\u7bc4\u56f2\u9650\u754c<\/td><td>-70\u00b0C ~ 600\u00b0C<\/td><td>-200\u00b0C ~ 700\u00b0C<\/td><\/tr><tr><td>\u5468\u56f2\u6e29\u5ea6<\/td><td>\u52b9\u679c\u306a\u3057<\/td><td>\u5f71\u97ff\u3092\u53d7\u3051\u308b<\/td><\/tr><tr><td>\u5fdc\u7b54\u6642\u9593<\/td><td>\u9045\u3044<\/td><td>\u901f\u3044<\/td><\/tr><tr><td>\u6e2c\u5b9a\u8ddd\u96e2<\/td><td>\u6e2c\u5b9a\u306f\u6e2c\u5b9a\u30dd\u30a4\u30f3\u30c8\u3067\u306e\u307f\u53ef\u80fd<\/td><td>\u9577\u8ddd\u96e2\u6e29\u5ea6\u6e2c\u5b9a\u304c\u53ef\u80fd\uff08\u30ad\u30e3\u30d4\u30e9\u30ea\u30fc\u7d4c\u7531\uff09<\/td><\/tr><tr><td>\u4fa1\u683c<\/td><td>\u3088\u308a\u5b89\u3044<\/td><td>\u3088\u308a\u9ad8\u3044<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-ecbcb6d74eb0aa55ecc7e2e2dc6ad5d4\"><span class=\"ez-toc-section\" 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allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-0e231f6638aadc7e770ab21f9a7db460\"><span class=\"ez-toc-section\" id=\"5-summary\"><\/span>5.\u6982\u8981<span 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\/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Difference Between Bimetal and Gas Expansion Thermometers?\" \/>\n<meta property=\"og:description\" content=\"There are many types of industrial thermometers. Among them, the common types are bimetallic and gas expansion thermometers. However, some people are often confused about the advantages and disadvantages between these thermometers. So let&#8217;s look at the differences between these thermometers. 1. Bimetal Thermometer Bimetal thermometers are made of two different kinds of metal bonded together. Each metal expands at different rates when heated, and by measuring this difference, we can measure temperature. Generally, the metal sheets are made into a coil, with the &#8220;free end&#8221; connected to the pointer shaft and the &#8220;fixed end&#8221; where the thermometer will be attached. When the temperature rises, the metal at the free [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sj-gauge.com\/ja\/bimetal-vs-gas-thermometers\/\" \/>\n<meta property=\"og:site_name\" content=\"SJ Gauge | Pressure Gauges, Thermometers &amp; Pressure Sensors\" \/>\n<meta property=\"article:published_time\" content=\"2023-05-17T03:35:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-13T05:03:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.sj-gauge.com\/wp-content\/uploads\/2025\/12\/3-02_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=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"SJ Gauge\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"2\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/\"},\"author\":{\"name\":\"SJ Gauge\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/#\\\/schema\\\/person\\\/cbc9e642e49a53b18b3eb832486bd52c\"},\"headline\":\"The Difference Between Bimetal and Gas Expansion Thermometers?\",\"datePublished\":\"2023-05-17T03:35:08+00:00\",\"dateModified\":\"2026-04-13T05:03:08+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/\"},\"wordCount\":389,\"publisher\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.sj-gauge.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/3-02_BN.jpg\",\"keywords\":[\"Temperature\"],\"articleSection\":[\"Knowledge\"],\"inLanguage\":\"ja\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/\",\"url\":\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/\",\"name\":\"The Difference Between Bimetal and Gas Expansion Thermometers? - SJ Gauge | Pressure Gauges, Thermometers &amp; Pressure Sensors\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.sj-gauge.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/3-02_BN.jpg\",\"datePublished\":\"2023-05-17T03:35:08+00:00\",\"dateModified\":\"2026-04-13T05:03:08+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.sj-gauge.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/3-02_BN.jpg\",\"contentUrl\":\"https:\\\/\\\/www.sj-gauge.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/3-02_BN.jpg\",\"width\":800,\"height\":500},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.sj-gauge.com\\\/bimetal-vs-gas-thermometers\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.sj-gauge.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"The Difference Between Bimetal and Gas Expansion Thermometers?\"}]},{\"@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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Among them, the common types are bimetallic and gas expansion thermometers. However, some people are often confused about the advantages and disadvantages between these thermometers. So let&#8217;s look at the differences between these thermometers. 1. Bimetal Thermometer Bimetal thermometers are made of two different kinds of metal bonded together. Each metal expands at different rates when heated, and by measuring this difference, we can measure temperature. Generally, the metal sheets are made into a coil, with the &#8220;free end&#8221; connected to the pointer shaft and the &#8220;fixed end&#8221; where the thermometer will be attached. 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