{"id":31070,"date":"2026-01-13T09:58:43","date_gmt":"2026-01-13T09:58:43","guid":{"rendered":"https:\/\/instrava.com\/?p=31070"},"modified":"2026-01-22T07:27:53","modified_gmt":"2026-01-22T07:27:53","slug":"bi-colour-level-gauges-for-boilers-reliable-water-level-indication-in-high-pressure-steam-systems","status":"publish","type":"post","link":"https:\/\/instrava.com\/fr\/bi-colour-level-gauges-for-boilers-reliable-water-level-indication-in-high-pressure-steam-systems\/","title":{"rendered":"Indicateurs de niveau bicolores pour chaudi\u00e8res : Indication fiable du niveau d'eau dans les syst\u00e8mes de vapeur \u00e0 haute pression"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"31070\" class=\"elementor elementor-31070\" data-elementor-post-type=\"post\">\n\t\t\t\t\r\n\t\t<div class=\"default no-position show_shadow rs-sticky-default elementor-element elementor-element-451aeb52 e-flex e-con-boxed e-con e-parent\" data-id=\"451aeb52\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\r\n\t\t\t\t<div class=\"elementor-element elementor-element-42a88fe1 elementor-widget elementor-widget-text-editor\" data-id=\"42a88fe1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2 data-start=\"371\" data-end=\"386\">Introduction<\/h2><p data-start=\"388\" data-end=\"704\">Accurate water level measurement is one of the most critical safety requirements in boiler systems. Bi-colour level gauges are specifically designed to provide clear and reliable visual indication of water and steam levels under high-pressure and high-temperature conditions commonly found in industrial boilers.<\/p><p data-start=\"706\" data-end=\"1053\">In power plants, industrial steam boilers, and process heating systems, bi-colour level gauges are widely recognized as a dependable solution for continuous level monitoring. Their red and green color indication allows boiler operators to instantly distinguish between liquid water and steam, significantly reducing the risk of operational errors.<\/p><hr data-start=\"1055\" data-end=\"1058\" \/><h2 data-start=\"1060\" data-end=\"1127\">Why Bi-Colour Level Gauges Are Essential for Boiler Applications<\/h2><p data-start=\"1129\" data-end=\"1321\">Boiler systems operate under extreme conditions where conventional level indicators often fail to provide reliable readings. <strong><a href=\"https:\/\/instrava.com\/product\/bi-color-level-gauge-for-boilers\/\">Bi-colour level gauges<\/a><\/strong> are engineered to meet these challenges.<\/p><p data-start=\"1323\" data-end=\"1364\">Key boiler-specific requirements include:<\/p><ul data-start=\"1366\" data-end=\"1544\"><li data-start=\"1366\" data-end=\"1409\"><p data-start=\"1368\" data-end=\"1409\">High operating pressure and temperature<\/p><\/li><li data-start=\"1410\" data-end=\"1450\"><p data-start=\"1412\" data-end=\"1450\">Clear visibility from long distances<\/p><\/li><li data-start=\"1451\" data-end=\"1500\"><p data-start=\"1453\" data-end=\"1500\">Immediate distinction between water and steam<\/p><\/li><li data-start=\"1501\" data-end=\"1544\"><p data-start=\"1503\" data-end=\"1544\">Compliance with boiler safety standards<\/p><\/li><\/ul><p data-start=\"1546\" data-end=\"1679\">Bi-colour level gauges address all these requirements, making them a preferred choice for boiler drum and steam system installations.<\/p><hr data-start=\"1681\" data-end=\"1684\" \/><h2 data-start=\"1686\" data-end=\"1743\">Working Principle of Bi-Colour Level Gauges in Boilers<\/h2><p data-start=\"1745\" data-end=\"1886\">The working principle of bi-colour level gauges used in boilers is based on optical refraction through specialized glass or quartz tubes.<\/p><ul data-start=\"1888\" data-end=\"2094\"><li data-start=\"1888\" data-end=\"1996\"><p data-start=\"1890\" data-end=\"1996\">When the gauge chamber contains water, the optical system refracts light to display a green color.<\/p><\/li><li data-start=\"1997\" data-end=\"2094\"><p data-start=\"1999\" data-end=\"2094\">When the chamber contains steam, light absorption causes the vapor phase to appear red.<\/p><\/li><\/ul><p data-start=\"2096\" data-end=\"2336\">This clear color contrast enables operators to accurately monitor boiler water levels even during rapid load changes. Unlike transparent level gauges, bi-colour level gauges maintain stable visibility at elevated pressures and temperatures.<\/p><hr data-start=\"2338\" data-end=\"2341\" \/><h2 data-start=\"2343\" data-end=\"2399\">Typical Boiler Applications of Bi-Colour Level Gauges<\/h2><p data-start=\"2401\" data-end=\"2496\"><strong>Bi-colour level gauges are commo<\/strong>nly installed in the following boiler-related applications:<\/p><h3 data-start=\"2498\" data-end=\"2514\">Boiler Drums<\/h3><p data-start=\"2515\" data-end=\"2710\">In steam boiler drums, maintaining a stable water level is essential to prevent tube overheating and carryover. Bi-colour level gauges provide continuous visual confirmation of drum water levels.<\/p><h3 data-start=\"2712\" data-end=\"2743\">High-Pressure Steam Boilers<\/h3><p data-start=\"2744\" data-end=\"2920\">For high-pressure boilers, reliable level indication is critical for safe operation. Bi-colour level gauges perform consistently where standard sight glasses become unreliable.<\/p><h3 data-start=\"2922\" data-end=\"2953\">Waste Heat Recovery Boilers<\/h3><p data-start=\"2954\" data-end=\"3130\">These boilers often experience fluctuating operating conditions. The strong visual contrast of bi-colour level gauges supports accurate level monitoring during load variations.<\/p><h3 data-start=\"3132\" data-end=\"3162\">Industrial Process Boilers<\/h3><p data-start=\"3163\" data-end=\"3308\">In chemical and petrochemical plants, bi-colour level gauges help operators maintain safe boiler operation in continuous production environments.<\/p><hr data-start=\"3310\" data-end=\"3313\" \/><h2 data-start=\"3315\" data-end=\"3382\">Technical Specifications for Boiler-Grade Bi-Colour Level Gauges<\/h2><p data-start=\"3384\" data-end=\"3480\">Below is a boiler-oriented technical parameter table suitable for engineering documentation.<\/p><h3 data-start=\"3482\" data-end=\"3527\">Typical Technical Parameters (Boiler Use)<\/h3><div class=\"TyagGW_tableContainer\"><div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"><div class=\"table-responsive\"><table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"3529\" data-end=\"3902\"><thead data-start=\"3529\" data-end=\"3558\"><tr data-start=\"3529\" data-end=\"3558\"><th data-start=\"3529\" data-end=\"3541\" data-col-size=\"sm\">Param\u00e8tres<\/th><th data-start=\"3541\" data-end=\"3558\" data-col-size=\"sm\">Typical Range<\/th><\/tr><\/thead><tbody data-start=\"3586\" data-end=\"3902\"><tr data-start=\"3586\" data-end=\"3623\"><td data-start=\"3586\" data-end=\"3607\" data-col-size=\"sm\">Pression de fonctionnement<\/td><td data-start=\"3607\" data-end=\"3623\" data-col-size=\"sm\">Up to 16 MPa<\/td><\/tr><tr data-start=\"3624\" data-end=\"3664\"><td data-start=\"3624\" data-end=\"3648\" data-col-size=\"sm\">Temp\u00e9rature de fonctionnement<\/td><td data-start=\"3648\" data-end=\"3664\" data-col-size=\"sm\">Up to 350 \u00b0C<\/td><\/tr><tr data-start=\"3665\" data-end=\"3710\"><td data-start=\"3665\" data-end=\"3686\" data-col-size=\"sm\">Application Medium<\/td><td data-start=\"3686\" data-end=\"3710\" data-col-size=\"sm\">Boiler Water \/ Steam<\/td><\/tr><tr data-start=\"3711\" data-end=\"3753\"><td data-start=\"3711\" data-end=\"3728\" data-col-size=\"sm\">Glass Material<\/td><td data-start=\"3728\" data-end=\"3753\" data-col-size=\"sm\">Borosilicate \/ Quartz<\/td><\/tr><tr data-start=\"3754\" data-end=\"3805\"><td data-start=\"3754\" data-end=\"3774\" data-col-size=\"sm\">Indication Colors<\/td><td data-start=\"3774\" data-end=\"3805\" data-col-size=\"sm\">Red (Steam) \/ Green (Water)<\/td><\/tr><tr data-start=\"3806\" data-end=\"3856\"><td data-start=\"3806\" data-end=\"3822\" data-col-size=\"sm\">Mat\u00e9riau du corps<\/td><td data-start=\"3822\" data-end=\"3856\" data-col-size=\"sm\">Carbon Steel \/ Stainless Steel<\/td><\/tr><tr data-start=\"3857\" data-end=\"3902\"><td data-start=\"3857\" data-end=\"3885\" data-col-size=\"sm\">Center-to-Center Distance<\/td><td data-start=\"3885\" data-end=\"3902\" data-col-size=\"sm\">300 \u2013 2000 mm<\/td><\/tr><\/tbody><\/table><\/div><\/div><\/div><p data-start=\"3904\" data-end=\"4079\">\ud83d\udcca <strong data-start=\"3907\" data-end=\"3927\">Chart suggestion<\/strong>:<br data-start=\"3928\" data-end=\"3931\" \/>A comparison chart showing maximum allowable pressure vs temperature for bi-colour level gauges used in boilers versus transparent level gauges.<\/p><hr data-start=\"4081\" data-end=\"4084\" \/><h2 data-start=\"4086\" data-end=\"4143\">Advantages of Bi-Colour Level Gauges in Boiler Systems<\/h2><p data-start=\"4145\" data-end=\"4264\">Compared with other level indication methods, bi-colour level gauges offer clear advantages in boiler environments:<\/p><ol data-start=\"4266\" data-end=\"4773\"><li data-start=\"4266\" data-end=\"4377\"><p data-start=\"4269\" data-end=\"4377\"><strong data-start=\"4269\" data-end=\"4306\">Immediate water-steam distinction<\/strong><br data-start=\"4306\" data-end=\"4309\" \/>Red and green colors eliminate guesswork in level interpretation.<\/p><\/li><li data-start=\"4379\" data-end=\"4477\"><p data-start=\"4382\" data-end=\"4477\"><strong data-start=\"4382\" data-end=\"4419\">High visibility for control rooms<\/strong><br data-start=\"4419\" data-end=\"4422\" \/>Suitable for long-distance viewing in boiler houses.<\/p><\/li><li data-start=\"4479\" data-end=\"4558\"><p data-start=\"4482\" data-end=\"4558\"><strong data-start=\"4482\" data-end=\"4504\">High safety margin<\/strong><br data-start=\"4504\" data-end=\"4507\" \/>Designed for severe boiler operating conditions.<\/p><\/li><li data-start=\"4560\" data-end=\"4668\"><p data-start=\"4563\" data-end=\"4668\"><strong data-start=\"4563\" data-end=\"4613\">Stable performance under pressure fluctuations<\/strong><br data-start=\"4613\" data-end=\"4616\" \/>Reliable during boiler start-up and load changes.<\/p><\/li><li data-start=\"4670\" data-end=\"4773\"><p data-start=\"4673\" data-end=\"4773\"><strong data-start=\"4673\" data-end=\"4716\">Compliance with boiler safety practices<\/strong><br data-start=\"4716\" data-end=\"4719\" \/>Widely accepted in industrial boiler installations.<\/p><\/li><\/ol><hr data-start=\"4775\" data-end=\"4778\" \/><h2 data-start=\"4780\" data-end=\"4838\">Bi-Colour Level Gauges vs Other Boiler Level Indicators<\/h2><h3 data-start=\"4840\" data-end=\"4873\">Boiler Application Comparison<\/h3><div class=\"TyagGW_tableContainer\"><div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\"><div class=\"table-responsive\"><table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"4875\" data-end=\"5308\"><thead data-start=\"4875\" data-end=\"4960\"><tr data-start=\"4875\" data-end=\"4960\"><th data-start=\"4875\" data-end=\"4885\" data-col-size=\"sm\">Fonctionnalit\u00e9<\/th><th data-start=\"4885\" data-end=\"4910\" data-col-size=\"sm\">Bi-Colour Level Gauges<\/th><th data-start=\"4910\" data-end=\"4932\" data-col-size=\"sm\">Reflex Level Gauges<\/th><th data-start=\"4932\" data-end=\"4960\" data-col-size=\"sm\">Transparent Level Gauges<\/th><\/tr><\/thead><tbody data-start=\"5039\" data-end=\"5308\"><tr data-start=\"5039\" data-end=\"5098\"><td data-start=\"5039\" data-end=\"5068\" data-col-size=\"sm\">Water\/Steam Identification<\/td><td data-start=\"5068\" data-end=\"5080\" data-col-size=\"sm\">Excellent<\/td><td data-start=\"5080\" data-end=\"5090\" data-col-size=\"sm\">Limit\u00e9e<\/td><td data-start=\"5090\" data-end=\"5098\" data-col-size=\"sm\">Poor<\/td><\/tr><tr data-start=\"5099\" data-end=\"5156\"><td data-start=\"5099\" data-end=\"5126\" data-col-size=\"sm\">High-Pressure Boiler Use<\/td><td data-start=\"5126\" data-end=\"5138\" data-col-size=\"sm\">Excellent<\/td><td data-start=\"5138\" data-end=\"5145\" data-col-size=\"sm\">Bon<\/td><td data-start=\"5145\" data-end=\"5156\" data-col-size=\"sm\">Limit\u00e9e<\/td><\/tr><tr data-start=\"5157\" data-end=\"5204\"><td data-start=\"5157\" data-end=\"5179\" data-col-size=\"sm\">Visibility Distance<\/td><td data-start=\"5179\" data-end=\"5186\" data-col-size=\"sm\">Longues<\/td><td data-start=\"5186\" data-end=\"5195\" data-col-size=\"sm\">Moyen<\/td><td data-start=\"5195\" data-end=\"5204\" data-col-size=\"sm\">Short<\/td><\/tr><tr data-start=\"5205\" data-end=\"5253\"><td data-start=\"5205\" data-end=\"5227\" data-col-size=\"sm\">Boiler Safety Level<\/td><td data-start=\"5227\" data-end=\"5234\" data-col-size=\"sm\">Haut<\/td><td data-start=\"5234\" data-end=\"5243\" data-col-size=\"sm\">Moyen<\/td><td data-start=\"5243\" data-end=\"5253\" data-col-size=\"sm\">Moyen<\/td><\/tr><tr data-start=\"5254\" data-end=\"5308\"><td data-start=\"5254\" data-end=\"5277\" data-col-size=\"sm\">Operator Readability<\/td><td data-start=\"5277\" data-end=\"5290\" data-col-size=\"sm\">Very Clear<\/td><td data-start=\"5290\" data-end=\"5301\" data-col-size=\"sm\">Mod\u00e9r\u00e9<\/td><td data-start=\"5301\" data-end=\"5308\" data-col-size=\"sm\">Faible<\/td><\/tr><\/tbody><\/table><\/div><\/div><\/div><p data-start=\"5310\" data-end=\"5437\">For high-pressure and critical boiler systems, bi-colour level gauges provide the highest level of operational reliability.<\/p><hr data-start=\"5439\" data-end=\"5442\" \/><h2 data-start=\"5444\" data-end=\"5504\">Installation Guidelines for Boiler Bi-Colour Level Gauges<\/h2><p data-start=\"5506\" data-end=\"5582\">Proper installation is essential for accurate boiler water level indication.<\/p><ul data-start=\"5584\" data-end=\"5877\"><li data-start=\"5584\" data-end=\"5644\"><p data-start=\"5586\" data-end=\"5644\">Install the gauge vertically on the boiler drum or column.<\/p><\/li><li data-start=\"5645\" data-end=\"5695\"><p data-start=\"5647\" data-end=\"5695\">Ensure correct alignment with boiler centerline.<\/p><\/li><li data-start=\"5696\" data-end=\"5757\"><p data-start=\"5698\" data-end=\"5757\">Use isolation valves and drain valves for safe maintenance.<\/p><\/li><li data-start=\"5758\" data-end=\"5821\"><p data-start=\"5760\" data-end=\"5821\">Verify pressure and temperature ratings before commissioning.<\/p><\/li><li data-start=\"5822\" data-end=\"5877\"><p data-start=\"5824\" data-end=\"5877\">Perform leak and functional tests after installation.<\/p><\/li><\/ul><p data-start=\"5879\" data-end=\"5997\">Correct installation ensures stable readings and extends the service life of bi-colour level gauges in boiler systems.<\/p><hr data-start=\"5999\" data-end=\"6002\" \/><h2 data-start=\"6004\" data-end=\"6062\">Maintenance and Safety Practices in Boiler Applications<\/h2><p data-start=\"6064\" data-end=\"6192\">Although bi-colour level gauges require minimal maintenance, regular inspection is recommended for boiler safety compliance.<\/p><h3 data-start=\"6194\" data-end=\"6225\">Maintenance Recommendations<\/h3><ul data-start=\"6226\" data-end=\"6386\"><li data-start=\"6226\" data-end=\"6287\"><p data-start=\"6228\" data-end=\"6287\">Clean the glass surface to maintain clear color indication.<\/p><\/li><li data-start=\"6288\" data-end=\"6341\"><p data-start=\"6290\" data-end=\"6341\">Inspect sealing components and valves periodically.<\/p><\/li><li data-start=\"6342\" data-end=\"6386\"><p data-start=\"6344\" data-end=\"6386\">Check for scale buildup from boiler water.<\/p><\/li><\/ul><h3 data-start=\"6388\" data-end=\"6413\">Safety Considerations<\/h3><ul data-start=\"6414\" data-end=\"6596\"><li data-start=\"6414\" data-end=\"6476\"><p data-start=\"6416\" data-end=\"6476\">Always isolate and depressurize the boiler before servicing.<\/p><\/li><li data-start=\"6477\" data-end=\"6537\"><p data-start=\"6479\" data-end=\"6537\">Follow boiler safety regulations and inspection intervals.<\/p><\/li><li data-start=\"6538\" data-end=\"6596\"><p data-start=\"6540\" data-end=\"6596\">Use protective covers in high-risk boiler installations.<\/p><\/li><\/ul><hr data-start=\"6598\" data-end=\"6601\" \/><h2 data-start=\"6603\" data-end=\"6654\">How to Select Bi-Colour Level Gauges for Boilers<\/h2><p data-start=\"6656\" data-end=\"6732\">When selecting <strong data-start=\"6671\" data-end=\"6697\">indicateurs de niveau bicolores<\/strong> for boiler applications, consider:<\/p><ol data-start=\"6734\" data-end=\"6928\"><li data-start=\"6734\" data-end=\"6778\"><p data-start=\"6737\" data-end=\"6778\">Boiler operating pressure and temperature<\/p><\/li><li data-start=\"6779\" data-end=\"6819\"><p data-start=\"6782\" data-end=\"6819\">Boiler type (fire-tube or water-tube)<\/p><\/li><li data-start=\"6820\" data-end=\"6846\"><p data-start=\"6823\" data-end=\"6846\">Required visible length<\/p><\/li><li data-start=\"6847\" data-end=\"6887\"><p data-start=\"6850\" data-end=\"6887\">Body and glass material compatibility<\/p><\/li><li data-start=\"6888\" data-end=\"6928\"><p data-start=\"6891\" data-end=\"6928\">Applicable boiler standards and codes<\/p><\/li><\/ol><p data-start=\"6930\" data-end=\"7036\">Selecting the right model ensures long-term reliability and compliance with boiler operation requirements.<\/p><hr data-start=\"7038\" data-end=\"7041\" \/><h2 data-start=\"7043\" data-end=\"7078\">Frequently Asked Questions (FAQ)<\/h2><p data-start=\"7080\" data-end=\"7234\"><strong data-start=\"7080\" data-end=\"7137\">Why are bi-colour level gauges preferred for boilers?<\/strong><br data-start=\"7137\" data-end=\"7140\" \/>They provide clear visual distinction between water and steam under extreme boiler conditions.<\/p><p data-start=\"7236\" data-end=\"7393\"><strong data-start=\"7236\" data-end=\"7300\">Can bi-colour level gauges be used on high-pressure boilers?<\/strong><br data-start=\"7300\" data-end=\"7303\" \/>Yes, they are specifically designed for high-pressure and high-temperature boiler systems.<\/p><p data-start=\"7395\" data-end=\"7545\"><strong data-start=\"7395\" data-end=\"7464\">Are bi-colour level gauges suitable for boiler drum installation?<\/strong><br data-start=\"7464\" data-end=\"7467\" \/>Yes, they are commonly installed on boiler drums and associated level columns.<\/p><p data-start=\"7547\" data-end=\"7690\"><strong data-start=\"7547\" data-end=\"7615\">What glass materials are used for boiler bi-colour level gauges?<\/strong><br data-start=\"7615\" data-end=\"7618\" \/>Borosilicate and quartz glass are commonly used for boiler applications.<\/p><hr data-start=\"7692\" data-end=\"7695\" \/><h2 data-start=\"7697\" data-end=\"7710\">Conclusion<\/h2><p data-start=\"7712\" data-end=\"8035\">For boiler systems operating under demanding conditions, bi-colour level gauges offer a reliable and safe solution for water level monitoring. Their clear red and green indication, robust construction, and suitability for high-pressure steam environments make them an essential component in modern boiler installations.<\/p><p data-start=\"8037\" data-end=\"8194\">By selecting and installing the correct bi-colour level gauges, boiler operators can improve safety, operational stability, and long-term system performance.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction Accurate water level measurement is one of the most critical safety requirements in boiler systems. Bi-colour level gauges are specifically designed to provide clear and reliable visual indication of water and steam levels under high-pressure and high-temperature conditions commonly found in industrial boilers. In power plants, industrial steam boilers, and process heating systems, bi-colour&#8230;<\/p>","protected":false},"author":1,"featured_media":31065,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[295],"tags":[533,537,534,538,535,522,540,539,536,529],"class_list":["post-31070","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-level-gauge","tag-bi-colour-level-gauges","tag-boiler-instrumentation","tag-boiler-level-gauge","tag-boiler-safety-equipment","tag-boiler-water-level-indication","tag-high-pressure-level-gauge","tag-industrial-level-gauges","tag-steam-boiler-level-measurement","tag-steam-drum-level-gauge","tag-visual-level-gauge"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bi-Colour Level Gauges for Boilers - Instrava<\/title>\n<meta name=\"description\" content=\"We provide bi-colour level gauges designed for boiler and steam drum applications, offering clear water and steam level indication under high-pressure and high-temperature conditions.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/instrava.com\/fr\/bi-colour-level-gauges-for-boilers-reliable-water-level-indication-in-high-pressure-steam-systems\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bi-Colour Level Gauges for Boilers - 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