{"id":6782,"date":"2026-03-15T20:14:30","date_gmt":"2026-03-15T20:14:30","guid":{"rendered":"https:\/\/yunrui-controls.com\/?post_type=products&#038;p=6782"},"modified":"2026-03-29T16:26:23","modified_gmt":"2026-03-29T16:26:23","slug":"liquiphant-ftl51b-endresshauser-supplier","status":"publish","type":"products","link":"https:\/\/www.yunrui-controls.com\/ja\/products\/liquiphant-ftl51b-endresshauser-supplier\/","title":{"rendered":"Liquiphant FTL51B | Digital, Simple, and Safe Vibronic Level Switch\uff5cEndress+Hauser supplier"},"content":{"rendered":"<h2 data-path-to-node=\"2\">Technical Characteristics and Safety Performance<\/h2>\n<ul data-path-to-node=\"3\">\n<li>\n<p data-path-to-node=\"3,0,0\">Universal Vibronic Principle: The tuning fork vibrates at its resonance frequency. When submerged in liquid, the frequency drops; the electronics detect this change and trigger the switching state. This principle is extremely robust against changing process conditions.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"3,1,0\">SIL 2\/3 Functional Safety: The FTL51B is 3rd-party approved for the highest safety requirements. It features a &#8220;Second Line of Defense&#8221; (gas-tight feedthrough), ensuring that even if the primary sensor diaphragm is damaged, the process media cannot escape into the electronics housing or the environment.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"3,2,0\">Guided Proof Testing: Mandatory periodic safety tests (SIL or WHG) are simplified via the SmartBlue App. Guided wizards walk the operator through the process, and the device generates automated documentation upon completion, significantly reducing manual paperwork and human error.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"3,3,0\">Heartbeat Technology: This suite provides continuous internal self-diagnostics. It can detect sensor corrosion or heavy buildup in real-time, allowing for predictive maintenance. Verification can be performed at any time without interrupting the process or opening the vessel.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"3,4,0\">Digital Communication and Asset Management: With integrated Bluetooth and optional digital protocols, the FTL51B provides real-time data access. Users can monitor device status and process parameters remotely, facilitating centralized asset management and faster troubleshooting.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"3,5,0\">Extension Tube Versatility: Unlike compact versions, the FTL51B features an extension tube that can be customized to the exact length required for high-level or low-level switching in deep tanks.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"4\">\u6280\u8853\u4ed5\u69d8\u30de\u30c8\u30ea\u30c3\u30af\u30b9<\/h3>\n<table data-path-to-node=\"5\">\n<thead>\n<tr>\n<td><strong>\u7279\u5fb4<\/strong><\/td>\n<td><strong>\u6280\u8853\u8a73\u7d30<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"5,1,0,0\">\u6e2c\u5b9a\u539f\u7406<\/span><\/td>\n<td><span data-path-to-node=\"5,1,1,0\">\u632f\u52d5\u97f3\uff08\u97f3\u53c9\uff09<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,2,0,0\">\u30c7\u30d0\u30a4\u30b9\u8a2d\u8a08<\/span><\/td>\n<td><span data-path-to-node=\"5,2,1,0\">\u5ef6\u9577\u30c1\u30e5\u30fc\u30d6\u30d0\u30fc\u30b8\u30e7\u30f3<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,3,0,0\">\u30d7\u30ed\u30bb\u30b9\u6e29\u5ea6<\/span><\/td>\n<td><span data-path-to-node=\"5,3,1,0\">-50 to +150\u00b0C (-58 to +302\u00b0F)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,4,0,0\">\u30d7\u30ed\u30bb\u30b9\u5727\u529b<\/span><\/td>\n<td><span data-path-to-node=\"5,4,1,0\">-1 to +100 bar (-14.5 to +1450 psi)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,5,0,0\">\u30bb\u30f3\u30b5\u30fc\u6750\u6599<\/span><\/td>\n<td><span data-path-to-node=\"5,5,1,0\">316L Stainless Steel or Alloy (e.g., C22)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,6,0,0\">\u51fa\u529b\u4fe1\u53f7<\/span><\/td>\n<td><span data-path-to-node=\"5,6,1,0\">FEL61 (AC), FEL62 (DC-PNP), FEL64 (Relay), FEL67 (PFM), FEL68 (NAMUR), IO-Link<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,7,0,0\">\u5b89\u5168\u3068\u30b3\u30f3\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9<\/span><\/td>\n<td><span data-path-to-node=\"5,7,1,0\">SIL 2\/3, WHG, ATEX, IECEx, Marine approvals<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4 data-path-to-node=\"6\">\u4e3b\u306a\u7528\u9014<\/h4>\n<ul data-path-to-node=\"7\">\n<li>\n<p data-path-to-node=\"7,0,0\">Critical Overfill Prevention: Serving as the final safety barrier in chemical and oil &amp; gas storage tanks to prevent environmental catastrophes.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,1,0\">High-Pressure Process Vessels: Reliable switching in reactors and separators where pressures reach up to 100 bar.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,2,0\">Corrosive Media Detection: Utilizing Alloy sensor materials to monitor aggressive acids or bases that would corrode standard stainless steel.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,3,0\">Safety Loops (SIS): Integration into safety-instrumented systems where high-demand or low-demand reliability is required.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,4,0\">Turbulent Liquid Monitoring: Level detection in mixing tanks with heavy agitation or gas bubbles where float switches or ultrasonic sensors might fail.<\/p>\n<\/li>\n<\/ul>\n<hr data-path-to-node=\"8\" \/>","protected":false},"excerpt":{"rendered":"<p>The Liquiphant FTL51B is a high-end vibronic point level switch specifically engineered for the global process industry. It is a &#8220;Safety by Design&#8221; instrument, developed according to IEC 61508 for direct use in SIL2 and SIL3 safety applications. Featuring an extension tube, the FTL51B allows for precise point level detection at specific depths in large tanks and vessels. Its measurement remains completely unaffected by physical fluid properties such as conductivity, density fluctuations, turbulence, foam, or significant build-up.<\/p>","protected":false},"author":1,"featured_media":6784,"parent":0,"menu_order":142,"comment_status":"open","ping_status":"open","template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"tags":[335],"brands":[115,341,347],"model_series":[],"industries":[54,53,55,59],"product_cat":[342],"class_list":["post-6782","products","type-products","status-publish","format-standard","has-post-thumbnail","hentry","tag-endresshauser-supplier","brands-endress-hauser","brands-level-measurement","brands-vibronic-point-level-detection","industries-chemical-petrochemical","industries-oil-gas","industries-power-generation","industries-water-wastewater","product_cat-level-measurement"],"acf":{"measuring_principle":"Vibration Liquids","characteristic__application":"Compact vibronic device with an optional pipe extension up to 6 m (19.7 ft);\r\nModular housing concept;\r\nWide range of certificates","interface_measurement":"","specialities":"Heartbeat Technology,\r\nBluetooth\u00ae Operation and maintenance SmartBlue App,\r\nLED Module,\r\nRFID TAG for easy identification,\r\nSecond line of defense,\r\nAmbient temperature down to -50\u00b0C (-60\u00b0C optional),\r\nTemperature spacer for high process temperature,\r\nPlug and play functionalities","supply__communication":"19...253V AC \/ 2-wire,\r\n10...55V \/ DC-PNP 3-wire,\r\n9...20V DC with relay DPDT,\r\n19...253V AC or 19...55V DC with relay DPDT,\r\n2-wire NAMUR,\r\n2-wire PFM,\r\n4-20mA HART","accuracy":"","ambient_temperature":"-60 \u00b0C...+70 \u00b0C\r\n(-51 \u00b0F...+158 \u00b0F)","process_temperature":"-50 \u00b0C...+150 \u00b0C\r\n(-58 \u00b0F...+302 \u00b0F)","process_pressure__max_overpressure_limit":"Vacuum...100 bar\r\nVacuum...1450 psi","min_density_of_medium":"0.5 g\/cm\u00b3\r\n(0.4 g\/cm\u00b3 optional)","main_wetted_parts":"316L\r\nAlloy","process_connection":"Threads:\r\nG3\/4A, G1A, R3\/4\", R1, NPT3\/4, NPT1\r\nFlanges:\r\nDN25...DN100\r\nASME 1\"...4\"\r\nJIS 25A...100A","process_connection_hygienic":"Tri-Clamp ISO2852","sensor_length":"Up to 6 m (19.7 ft)","max_measurement_distance":"","communication":"2-wire direct load\r\nHART\r\nDC-PNP 3-wire\r\nRelays\r\nNAMUR\r\nPFM\r\nBluetooth\u00ae wireless technology","certificates__approvals":"ATEX, IEC Ex, CSA, NEPSI, KC, JPN Ex, INMETRO, UK Ex","safety_approvals":"Overfill protection WHG\r\nSIL2\/ SIL 3 according to IEC 61508","design_approvals":"EN 10204-3.1\r\nNACE MR0175, MR0103\r\nASME B31.3 Process Piping\r\nAD2000\r\nCRN\r\nAD 2000","hygienic_approvals":"","marine_approval":"ABS\/ LR\/ BV\/ DNV","options":"Heavy duty stainless steel housing","application_limits":"","components":"FTL325P Interface PFM\r\nFTL325N Interface NAMUR","datasheet":6787},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.8 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Source Original Liquiphant FTL51B from China<\/title>\n<meta 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