{"id":6818,"date":"2026-03-15T21:19:01","date_gmt":"2026-03-15T21:19:01","guid":{"rendered":"https:\/\/yunrui-controls.com\/?post_type=products&#038;p=6818"},"modified":"2026-03-29T16:26:34","modified_gmt":"2026-03-29T16:26:34","slug":"liquiphant-ftl81-endresshauser-supplier","status":"publish","type":"products","link":"https:\/\/www.yunrui-controls.com\/ko\/products\/liquiphant-ftl81-endresshauser-supplier\/","title":{"rendered":"Liquiphant FTL81 | FailSafe Level Switch with Extension Pipe for SIL3 Safety\uff5cEndress+Hauser supplier"},"content":{"rendered":"<h2 data-path-to-node=\"2\">Technical Characteristics and FailSafe Reliability<\/h2>\n<ul data-path-to-node=\"3\">\n<li>\n<p data-path-to-node=\"3,0,0\">Single-Device SIL3 Integrity: The FTL81 is engineered for the highest level of risk reduction, meeting SIL3 standards (1oo1 architecture). This is achieved through internal redundancy and continuous self-monitoring of the tuning fork and electronics, ensuring any internal fault is immediately detected.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"3,1,0\">Long-Term Maintenance Efficiency: Thanks to its intelligent diagnostics, the FTL81 supports a proof test interval of up to 12 years. Verification can be performed remotely or at the press of a button, significantly lowering the total cost of ownership and increasing plant uptime.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"3,2,0\">Comprehensive Fork Monitoring: The device does not just check for the presence of liquid; it actively monitors the tuning fork for mechanical damage, corrosion, blocking, or heavy coating. This ensures the safety function is never compromised by the process conditions.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"3,3,0\">4-20mA NAMUR Interface: Using the NAMUR NE 06\/NE 43 standard, the FTL81 communicates its status (covered, free, or fault) via a current signal. This allows for simple integration into a safety PLC or the dedicated Nivotester FailSafe FTL825 switching unit for automated safety loops.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"3,4,0\">Second Line of Defense: The FTL81 includes a gas-tight feedthrough as standard. This secondary containment barrier prevents hazardous process media from leaking into the electronics housing or the environment if the primary sensor diaphragm is breached.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"3,5,0\">Extreme Process Versatility: Constructed from 316L or Alloy C, the sensor can handle extreme temperatures from -60 to +280\u00b0C and high-pressure environments up to 100 bar.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"4\">\uae30\uc220 \uc0ac\uc591 \ub9e4\ud2b8\ub9ad\uc2a4<\/h3>\n<table data-path-to-node=\"5\">\n<thead>\n<tr>\n<td><strong>\uae30\ub2a5<\/strong><\/td>\n<td><strong>\uae30\uc220 \uc138\ubd80 \uc815\ubcf4<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"5,1,0,0\">\uce21\uc815 \uc6d0\ub9ac<\/span><\/td>\n<td><span data-path-to-node=\"5,1,1,0\">\uc9c4\ub3d9\uc74c(\uc18c\ub9ac\uad7d\uc1e0)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,2,0,0\">\uc548\uc804 \ubb34\uacb0\uc131 \uc218\uc900<\/span><\/td>\n<td><span data-path-to-node=\"5,2,1,0\">SIL3 (Single device 1oo1)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,3,0,0\">Sensor Design<\/span><\/td>\n<td><span data-path-to-node=\"5,3,1,0\">Extension pipe version (up to 3m \/ 9.8ft)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,4,0,0\">\uacf5\uc815 \uc628\ub3c4<\/span><\/td>\n<td><span data-path-to-node=\"5,4,1,0\">-60 ~ +280\u00b0C (-76 ~ +540\u00b0F)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,5,0,0\">\uacf5\uc815 \uc555\ub825<\/span><\/td>\n<td><span data-path-to-node=\"5,5,1,0\">-1 ~ +100 bar (-14.5 ~ +1,450 psi)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,6,0,0\">\ucd9c\ub825 \uc2e0\ud638<\/span><\/td>\n<td><span data-path-to-node=\"5,6,1,0\">4-20mA (NAMUR NE 06 \/ NE 43)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,7,0,0\">\uc548\uc804 \ubc0f \uaddc\uc815 \uc900\uc218<\/span><\/td>\n<td><span data-path-to-node=\"5,7,1,0\">SIL3, WHG, ATEX, IECEx, \ud574\uc591<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4 data-path-to-node=\"6\">\uc8fc\uc694 \uc751\uc6a9 \ubd84\uc57c<\/h4>\n<ul data-path-to-node=\"7\">\n<li>\n<p data-path-to-node=\"7,0,0\">Deep Tank Overfill Protection: Providing a SIL3-rated high-level alarm in large storage tanks for volatile or toxic chemicals.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,1,0\">Sumps and Underground Reservoirs: Using the extension pipe to detect liquid levels at specific depths where standard sensors cannot reach.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,2,0\">Safety-Critical Chemical Reactors: Monitoring levels in high-pressure, high-temperature reactors where the media is highly aggressive.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,3,0\">Environmental Protection: Serving as a &#8220;FailSafe&#8221; barrier for hazardous liquids to comply with strict WHG regulations and prevent spills.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,4,0\">Remote Safety Nodes: Ideal for installations where frequent manual proof testing is difficult or dangerous, utilizing the 12-year testing interval.<\/p>\n<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>The Liquiphant FTL81 is a high-integrity vibronic point level switch designed for hazardous areas and critical safety-instrumented systems. While it shares the advanced FailSafe architecture of the FTL80, the FTL81 features an extension pipe of up to 3 meters (9.8 ft), allowing for precise level detection at specific heights in deep tanks or vessels. It is developed to achieve SIL3 functional safety with a single device, providing a robust and active measuring technology that is immune to changing media properties, foam, turbulence, or significant build-up.<\/p>","protected":false},"author":1,"featured_media":6820,"parent":0,"menu_order":134,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","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":"","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":""}},"ast-content-background-meta":{"desktop":{"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":""},"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],"product_cat":[342],"class_list":["post-6818","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","product_cat-level-measurement"],"acf":{"measuring_principle":"Vibration Liquids","characteristic__application":"Reliable point level switch with extension pipe for MIN and MAX safety applications up to SIL3.\r\nDual Sealing \/ Second line of defense\r\nModular housing concept","interface_measurement":"","specialities":"Outstanding features:\r\n- permanent LIVE signal\r\nmonitors function safety\r\n- failsafe design and\r\n- high availability of the measuring values","supply__communication":"2-wire 4...20 mA","accuracy":"","ambient_temperature":"-60\u00b0C...+70\u00b0C\r\n(-76\u00b0F...+160\u00b0F)","process_temperature":"-60\u00b0C...+280\u00b0C\r\n(-76\u00b0F...+540\u00b0F)","process_pressure__max_overpressure_limit":"Vacuum...100 bar\r\n(1450 psi)","min_density_of_medium":"Density from 0.4 g\/cm3\r\n(0.4 SGU)","main_wetted_parts":"316L\r\nAlloy C","process_connection":"Flange:\r\nDN25...DN100,\r\nASME 1\"...4\",\r\nJIS 10K...20K\r\nThread:\r\nG3\/4, G1, R3\/4,\r\nR1, MNPT3\/4, MNPT1","process_connection_hygienic":"","sensor_length":"Extension pipe up to 3 m (9.8 ft)","max_measurement_distance":"","communication":"2-wire 4...20 mA","certificates__approvals":"ATEX, FM, CSA, CSA C\/US, IEC Ex, NEPSI, EAC","safety_approvals":"Overfill protection WHG\r\nLeakage Detection\r\nSIL3","design_approvals":"EN 10204-3.1\r\nNACE MR0175, MR0103\r\nASME B31.3\r\nAD2000","hygienic_approvals":"","marine_approval":"GL\/ ABS\/ LR\/ BV\/ DNV","options":"PWIS free\r\nPressure tight feed through\r\nWeather protection","application_limits":"","components":"Nivotester FTL825, Transmitter","datasheet":6821},"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>Liquiphant FTL81 | Fast Shipping &amp; Best Price<\/title>\n<meta name=\"description\" content=\"Searching for a trusted Liquiphant FTL81 supplier? 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