Endress+Hauser FTL51B Tuning fork level switch

Tuning fork level switch

Endress+Hauser FTL51B

Configurable Models 20 models

The Liquiphant FTL51B is specialized for the process industry and already developed according to IEC 61508 to be used directly in SIL2 and SIL3 applications without big efforts. You conduct periodic proof tests according to SIL or WHG simply mobile with an intuitive wizard. At the end you receive an automated documentation. Liquiphant measures reliably and is not affected by changing media properties, flow, turbulences, gas bubbles, foam, vibrations or build-up.

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Density

Measuring Principle	Vibration Density
Product Headline	Vibronic point level switch with optional extension tube for liquid applications in hazardous areas . Reliable density measurement values not affected by: changing media properties, gas bubbles, foam, build-up, flow or turbulences.
Characteristic / Application	Compact vibronic device with an optional pipe extension up to 6 m (19.7 ft), Modular housing concept, Wide range of certificates
Ambient temperature	-60 °C...+70 °C (-51 °F...+158 °F)
Process temperature	-50 °C...+150 °C (-58 °F...+302 °F)
Process pressure	Vacuum...100 bar Vacuum...1450 psi
Wetted parts	316L Alloy
Sensor length	Up to 6 m (19.7 ft)
Certificates / Approvals	ATEX, IEC Ex, CSA, NEPSI, KC, JPN Ex, INMETRO
Specialities	Heartbeat Technology, Bluetooth® Operation and maintenance SmartBlue App, LED Module, RFID TAG for easy identification, Second line of defense, Ambient temperature down to -50°C (-60°C optional), Temperature spacer for high process temperature, Plug and play functionalities
Components	Density Computer FML621
Measuring range	Density range: 0.3 to 2 g/cm³
Other approvals and certificates	Overfill protection WHG SIL2/ SIL 3 according to IEC 61508

Point Level / Liquids

Measuring Principle	Vibration Liquids
Characteristic / Application	Compact vibronic device with an optional pipe extension up to 6 m (19.7 ft); Modular housing concept; Wide range of certificates
Specialities	Heartbeat Technology, Bluetooth® Operation and maintenance SmartBlue App, LED Module, RFID TAG for easy identification, Second line of defense, Ambient temperature down to -50°C (-60°C optional), Temperature spacer for high process temperature, Plug and play functionalities
Supply / Communication	19...253V AC / 2-wire, 10...55V / DC-PNP 3-wire, 9...20V DC with relay DPDT, 19...253V AC or 19...55V DC with relay DPDT, 2-wire NAMUR, 2-wire PFM, 4-20mA HART
Ambient temperature	-60 °C...+70 °C (-51 °F...+158 °F)
Process temperature	-50 °C...+150 °C (-58 °F...+302 °F)
Process pressure / max. overpressure limit	Vacuum...100 bar Vacuum...1450 psi
Min. density of medium	0.5 g/cm³ (0.4 g/cm³ optional)
Main wetted parts	316L Alloy
Process connection	Threads: G3/4A, G1A, R3/4", R1, NPT3/4, NPT1 Flanges: DN25...DN100 ASME 1"...4" JIS 25A...100A
Process connection hygienic	Tri-Clamp ISO2852
Sensor length	Up to 6 m (19.7 ft)
Communication	2-wire direct load HART DC-PNP 3-wire Relays NAMUR PFM Bluetooth® wireless technology
Certificates / Approvals	ATEX, IEC Ex, CSA, NEPSI, KC, JPN Ex, INMETRO, UK Ex
Safety approvals	Overfill protection WHG SIL2/ SIL 3 according to IEC 61508
Design approvals	EN 10204-3.1 NACE MR0175, MR0103 ASME B31.3 Process Piping AD2000 CRN AD 2000
Marine approval	ABS/ LR/ BV/ DNV
Options	Heavy duty stainless steel housing
Components	FTL325P Interface PFM FTL325N Interface NAMUR

The new-generation Liquiphant FTL51 is a limit switch dedicated to industrial process applications, designed in accordance with IEC 61508 and easily meeting SIL2 and SIL3 application requirements. An intuitive setup wizard helps users regularly perform SIL or WHG self-tests and automatically generates verification documentation.
Liquiphant measures reliably and is unaffected by changes in medium properties, turbulence, bubbles, foam or buildup.

Advantages
Diagnostics: permanent diagnostic functions increase plant safety. Connect the device via the SmartBlue App for easy online diagnostics
Verification: verify the device without interrupting the process. Query device status via the smart device.
Monitoring: online monitoring of the fork vibration frequency and real-time acquisition of sensor parameters for predictive maintenance and process optimization
Heartbeat Technology identifies signs of corrosion directly and at an early stage
Quick and easy periodic self-test at the push of a button using the setup wizard
No calibration required. Plug-and-play
Designed in accordance with IEC 61508, fully meeting the requirements of SIL2 and SIL3 applications

Application
Limit switch with extension tube, suitable for limit detection of all kinds of liquids.
Process connections: threaded, flanged and hygienic connections (Tri-Clamp)
Temperature range: -50...+150°C (-58...+302°F)
Pressure range: -1...+100 bar (-14.5...+1450 psi)
Sensor material: 316L, alloy
International explosion protection, WHG overfill protection, SIL and marine approvals

Spare Parts & Accessories 105

105 spare parts · click to collapse

Order code	Description
XPF0040-	Liquiphant 2-wire platform housingUsage: FTL41, FTL51B, FTL62, FTL63, FTL64.	Enquire
71487198	Blind plug, M20, 316L, O-ring EPDMConsists of: blind plug, O-ring PTFE coated 17.0x2.0. Usage: FHX50B, FTL51B, FTL62, FTL63, FTL64, FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, NMT81, PMC51B, PMC71B, PMD50, PMD55B, PMD75B, PMD78B, PMP50, PMP51B, PMP71B.	Details
71487199	Plug: M20, aluminum, EPDM sealing ringConsists of: blind plug, O-ring PTFE coated 17.0x2.0. Usage: FHX50B, FTL51B, FTL62, FTL63, FTL64, FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, NMT81, PMC51B, PMC71B, PMD50, PMD55B, PMD75B, PMD78B, PMP50, PMP51B, PMP71B.	Details
71487203	Blind plug, NPT1/2, 316LConsists of: blind plug, PTFE coated. Usage: FHX50B, FTL51B, FTL62, FTL63, FTL64, FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, NMT81, PMC51B, PMC71B, PMD50, PMD55B, PMD75B, PMD78B, PMP50, PMP51B, PMP71B.	Details
71487201	Blind plug, NPT1/2, aluminumConsists of: blind plug, PTFE coated. Usage: FHX50B, FTL51B, FTL62, FTL63, FTL64, FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, NMT81, PMC51B, PMC71B, PMD50, PMD55B, PMD75B, PMD78B, PMP50, PMP51B, PMP71B.	Details
71435135	Cable gland M20, plastic, suitable for models: FTL41, FTL51B, PMC51B, PConsists of: Cable gland, O-ring 17.0 x 2.0 PTFE coated. Usage: FHX50B, FMB70, FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL41, FTL51B, FTL62, FTL63, FTL64, PMC51B, PMC71B, PMD50, PMD55B, PMD63B, PMD75B, PMD78B, PMP50, PMP51B, PMP63B, PMP71B.	Details
71701449	Cable gland, blue, M20, plasticConsists of: Cable gland blue M20x1.5, PA, O-ring 17.0 x 2.0 PTFE coated. Usage: FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL64, PMC51B, PMC71B, PMD55B, PMD75B, PMD78B, PMP51B, PMP71B.	Details
71435136	Cable gland M20, nickel-plated brass, suitable for: FMG50, FTL41, FTL51B, PConsists of: Cable gland, O-ring 17.0 x 2.0 PTFE coated. Usage: FHX50B, FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL41, FTL51B, FTL62, FTL63, FTL64, PMC51B, PMC71B, PMD55B, PMD75B, PMD78B, PMP51B, PMP71B.	Details
71435137	Cable gland M20, 316L, suitable for models: FMG50, FTL51B, PMC51BConsists of: Cable gland, O-ring 17.0 x 2.0 PTFE coated. Usage: FHX50B, FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL63, FTL64, PMC51B, PMC71B, PMD55B, PMD75B, PMD78B, PMP51B, PMP71B.	Details
71440660	M20x1.5-G1/2 adapter, aluminumConsists of: Adapter set, O-ring, 17.0 x 2.0 PTFE coated. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL41, FTL51B, FTL62, FTL63, FTL64, PMC51B, PMC71B, PMD50, PMD55B, PMD75B, PMD78B, PMP50, PMP51B, PMP71B.	Details
71440667	M20x1.5-G1/2 adapter, 316LConsists of: Adapter, O-Ring 17.0 x 2.0 PTFE coated. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL41, FTL51B, FTL62, FTL64, PMC51B, PMC71B, PMD50, PMD55B, PMD75B, PMD78B, PMP50, PMP51B, PMP71B.	Details
71462833	M20x1.5-G1/2 adapter, plasticUsage: FTL41, FTL51B, FTL62, FTL63, FTL64.	Details
71462835	M20x1.5 to 1/2" NPT adapter, plasticUsage: FTL41, FTL51B, FTL62, FTL63, FTL64.	Details
71435138	Plug connector M20, nickel-plated brass, suitable for: screw-in thread, FMG50Usage: M12 screw-in thread, FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL64, PMC51B, PMC71B, PMD55B, PMD75B, PMD78B, PMP51B, PMP71B.	Details
71435139	M12 plug, 316L, APL, housing sideUsage: M12 screw-in thread. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL63, FTL64, FTM50, FTM51, FTM52, PMC51B, PMC71B, PMD55B, PMD75B, PMD78B, PMP51B, PMP71B.	Details
71474251	Enclosure grounding terminal L+PConsists of: spring washer, screw, earth handle, clamp. Usage Liquiphant: Only for digital communication. Usage: FHX50B, FMG50, PMD50, PMD55B, PMD63B, PMD75B, PMD78B, PMC51B, PMC71B, PMP50, PMP51B, PMP63B, PMP71B, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL63, FTL64.	Details
71589844	Ground terminal LiquiphantConsists of: spring washer, screw, Earth handle, clamp. Usage: Only for switch electronics. Usage: FTL41, FTL51B, FTL62, FTL63, FTL64.	Details
71589861	Ground terminal plastic housing L+PConsists of: spring, washer, clamp. Usage Liquiphant: For digital communication only Usage: FHX50B, FTL51B, FTL62, FTL63, FTL64, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B.	Details
71647970	Ground terminal, plastic housing, Liquiphant ESConsists of: spring washer, screw, grounding bracket. Usage: Only for switch electronics. Usage: FTL41, FTL51B, FTL62, FTL63, FTL64.	Details
71647972	Ground terminal, hygienic housing, Liquiph. ESConsists of: spring washer, screw, clamp strap. Usage: Only for switch electronics. Usage: FTL41, FTL51B, FTL62, FTL63, FTL64.	Details
71647974	Ground terminal hygiene housing L+PConsists of: spring washer, screw, clamp strap. Usage Liquiphant: Only for digital communication. Usage: FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL63, FTL64.	Details
71435116	Housing cover, aluminum, sealed cover, O-ring, HNBR. Suitable for models: FMG50, FTL41, FTLSealing ring, HNBR. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL41, FTL51B, FTL62, FTL63, FTL64, PMC51B, PMC71B, PMD55B, PMD75B, PMD78B, PMP51B, PMP71B.	Details
71435118	Housing cover, aluminum, closed cover, Ex d seal, HNBR. Suitable for: FMG50, FTL4Sealing ring, HNBR. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL41, FTL51B, FTL62, FTL63, FTL64, NMT81, PMC51B, PMC71B, PMD55B, PMD75B, PMD78B, PMP51B, PMP71B.	Details
71435122	Housing cover, 316L, sealed cover, Ex d sealing ring, HNBR. Suitable for model: FMG50, FSealing ring, HNBR. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL63, FTL64, NMT81, PMC71B, PMD75B, PMD78B, PMP71B.	Details
71435126	Housing cover, plastic, sealed cover, O-ring, EPDM. Applicable models: FTL41, FTL51B.Sealing ring, EPDM. Usage: FMR54B, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL41, FTL51B, FTL62, FTL63, FTL64.	Details
71435127	Housing cover, plastic, BT/LED module sealing ring, EPDM. For Bluetooth/LSealing ring, EPDM. For Bluetooth/LED module. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71435123	Cover, 316L, with sight glass, Ex d gasket, HNBR. Suitable for: FMG50Sealing ring: HNBR. Sight glass: borosilicat. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL63, FTL64, NMT81, PMC71B, PMD75B, PMD78B, PMP71B.	Details
71435129	Housing cover, aluminum, window, BT/LED module seal, HNBR. Window material: plastic. ForSealing ring: HNBR. Sight glass: plastic. For Bluetooth/LED module. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71435130	Housing cover, aluminum, with window, Ex d, BT/LED seal ring, HNBR. Window material: glass.Sealing ring: HNBR. Sight glass: glass. For Bluetooth/LED module. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71439089	Aluminum cover with glass viewing windowSealing ring: HNBR. Sight glass: plastic. Usage: FHX50B, FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL41, FTL51B, FTL62, FTL63, FTL64, NMT81, PMC51B, PMC71B, PMD55B, PMD75B, PMD78B, PMP51B, PMP71B, QWX43.	Details
71435131	Sealing ring EPDM, 5 pcs. Applicable models: FTL41, FTL51B, PMC51B, PMUsage: FHX50B, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL41, FTL51B, FTL62, FTL63, FTL64.	Details
71435132	Seal ring HNBR, -40 °C, 5 pcs. Suitable for models: FMG50, FTL41, FTL5Usage: FHX50B, FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL41, FTL51B, FTL62, FTL63, FTL64, PMC51B, PMC71B, PMD55B,PMD75B, PMD78B, PMP51B, PMP71B.	Details
71435134	Sealing ring FVMQ, -60°C, 5 pcs. Applicable model: FTL51B.Usage: FHX50B, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL63, FTL64, NMT81, PMD75B, PMD78B, PMP71B.	Details
71435128	Housing cover, 316L, connection compartment, Ex d sealing ring, HSealing ring, HNBR. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, PMC71B, PMD75B, PMD78B, PMP71B.	Details
71439085	Cover, aluminum, connection compartmentSealing ring, HNBR. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, PMC51B, PMC71B, PMD55B, PMD75B, PMD78B, PMP51B, PMP71B.	Details
71671700	Locking screw, electronics compartment coverConsists of: 3x screw M4x5 and pin 29,9. Usage: Cover closed, electronics room single and dual compartment, or connection room dual compartment L-shape. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL41, FTL51B, FTL62, FTL63, FTL64, PMC51B, PMC71B, PMD55B, PMD75B, PMD78B, PMP51B, PMP71B.	Details
71671712	Locking screw, cover sight glass BT/LEDConsists of: 3x screw M4x5 and pin 62. Usage: Cover with sight glass, BT/LED. Usage: FLT51B, FTL62, FTL63, FTL64.	Details
71432518	Electronic insert FEL61, 19-253 VAC, 2-wire, with test button. Suitable for model: FTL512-wire incl. test button. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71432519	Electronic insert FEL62, PNP 10-55 VDC, 3-wire, with test button. Suitable for: FTL3-wire incl. test button. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71432547	Electronics FEL62, PNP 10-55 VDC, Low Temp3-wire incl. test button. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71432549	Electronic plug-in module FEL64 DC, relay DPDT 9-20VDC, contact rating 253V/9-20VDC, contact 253V/6A incl. test button. Usage: FTL51B, FTL62,FTL63, FTL64.	Details
71432553	Electronics FEL64 DC, relay DPDT, Low Temp9-20VDC, contact 253V/6A Incl. test button. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71432570	Electronic module FEL64, relay DPDT 19-253VAC/19-55VDC, contact19-253VAC/19-55VDC, contact 253V/6A incl. test button. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71432572	Electronics FEL64, relay DPDT, Low Temp19-253VAC/19-55VDC, contact 253V/6A Incl. test button. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71432573	Electronic plug-in module FEL67 PFM 2-wire PFM, with test button. Suitable for model: FTL51B.2-wire PFM incl. test button. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71432574	Electronics FEL67 PFM, Low Temp2-wire PFM incl. test button. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71432575	Electronic insert FEL68 NAMUR 2-wire, NAMUR H-L signal, with test button. Applicable2-wire, NAMUR H-L signal incl. test button. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71432576	Electronic module FEL68 NAMUR, -50oC2-wire, NAMUR H-L signal incl. test button. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71432577	Electronic insert FEL60D, density/concentration, suitable for model: FTL51B.Usage: FTL51B, FTL62, FTL63, FTL64.	Details
XPF0055-	Communication electronics moduleUsage: FTL51B, FTL62, FTL63, FTL64.	Enquire
71458631	Power supply module TU100A, 4-20 mAInternal designation: TU100A, 1-channel terminal. Usage: FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, PMD75B, PMD78B, FTL51B, FMG50, FTL62, FTL63, FTL64.	Details
71458633	Terminal UnitTo connect FHX50B. Usage: FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FMG50, NMT81.	Details
71437381	Bluetooth module VU121, requires battery for operation: FEL68 NAMUR output, FTL51BUsage: FEL68 NAMUR Output, FTL51B, FTL62, FTL63, FTL64.	Details
71437383	Bluetooth module VU121, no additional battery required: FTL51BExcl. battery. Usage: FTL51B, FTL62, FTL63, FTL64.	Details
71437382	LED lamp module VU120, for FL51B use only: FTL51BUsage: FTL51B, FTL62, FTL63, FTL64.	Details
71435775	DisplayTouch control. Usage: FHX50B, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL63, FTL64, PMC71B, PMD75B, PMD78B, PMP71B.	Details
71435781	Display + Bluetooth VU113 with buttonsTouch control. Usage: FHX50B, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL63, FTL64, PMC71B, PMD75B, PMD78B, PMP71B.	Details
52014048	O-ringProcess gasket for process connections G1	Details
71185027	O-ringProcess gasket DIN7603-A. Usage: process connection, FMI51, FMI52, FTI51, FTI52, FMP50, FMP51, FMP56, FMR43, FMR60B, FMR62, QMW43, FTL31, FTL33, FTL41, FTW23, FTW33, FTL50, FTL50H, FTL51, FTL51B, FTL80, FTL81.	Details
71437508	Test magnet, FTL51B Applicable model: FTL51B.Usage: FTL43, FTL51B, FTL62, FTL63, FTL64.	Details
52010285	M12 connector, 90° angled, with 5 m cable适用于M12插头带5m电缆 PVC材质，铜镀锡/ 镍锁紧螺母	Details
52024216	Cable socketM12x1 plug 5m cable PVC, 316L lock Especially for sanitary applications	Details
52003663	Sliding sleeve 100 bar G1, 316L, switching point adjustable. Max. 100 bar process pressureFTL51/FTL71 Switch point adjustment max 100bar process pressure :: disassembly protection under pressure Material: 316L	Details
52011880	Sliding sleeve 100 bar G1, 316L, 3.1 switch point adjustable. Max. 100 bar overpressureFTL51/FTL71 Switch point adjustment max 100bar process pressure :: Disassembly protection under pressure Material: 316L Inspection cert. EN10204-3.1 material (316L wetted parts)	Details
52003665	Sliding sleeve 100 bar G1-1/2, 316L, switch actuation point adjustable. Max. 100 barFTL51/FTL71 Switch point adjustment max 100bar process pressure :: disassembly protection under pressure Material: 316L	Details
52011882	Sliding sleeve 100 bar G1-1/2, 316L, 3.1 switching point adjustable. Max. 100FTL51/FTL71 Switch point adjustment max 100bar process pressure :: Disassembly protection under pressure Material: 316L Inspection cert. EN10204-3.1 material (316L wetted parts)	Details
52003667	Sliding sleeve, 100 bar, NPT1, 316L; switch point adjustable. Max. process pressure 100 bar.FTL51/FTL71 Switch point adjustment max 100bar process pressure :: Disassembly protection under pressure Material: 316L	Details
52011881	Sliding sleeve 100 bar NPT1, 316L, 3.1 switching point adjustable. Max. 100 barFTL51/FTL71 Switch point adjustment max 100bar process pressure :: Disassembly protection under pressure Material: 316L Inspection cert. EN10204-3.1 material (316L wetted parts)	Details
52003669	Sliding sleeve 100 bar NPT1-1/2, 316L, switch actuation point adjustable. Max. 100 barFTL51/FTL71 Switch point adjustment max 100bar process pressure :: Disassembly protection under pressure Material: 316L	Details
52011883	Sliding sleeve, 100 bar, NPT 1-1/2, 316L, 3.1 switch actuation point adjustable. Max. 1FTL51/FTL71 Switch point adjustment max 100bar process pressure :: Disassembly protection under pressure Material: 316L Inspection cert. EN10204-3.1 material (316L wetted parts)	Details
52003978	Sliding sleeve G1, 316L. Switching point adjustable. Low-pressure environment. Material: 316L. Applicable models:FTL51/FTL71 Switch point adjustment for pressureless condition Material: 316L	Details
52011888	Sliding sleeve G1, 316L, 3.1 switching point adjustable. Low-pressure environment. Material: 316L. Inspection.FTL51/FTL71 Switch point adjustment for pressureless condition Material: 316L Inspection cert. EN10204-3.1 material (316L wetted parts)	Details
71118691	Sliding sleeve 100 bar G1, Alloy C22, 3.1 switching point adjustable. Max. 100Switch point adjustment. Max 100bar process pressure. :: Disassembly protect. under pressure. Material: AlloyC22. Inspection cert. EN10204-3.1 material (AlloyC22 wetted parts). Usage: FTL41, FTL51, FTL51B, FTL71, FTL81.	Details
52003980	Sliding sleeve G1-1/2, 316L. Switch actuation point adjustable. Low-pressure environment. Material: 316L. SuitableFTL51/FTL71 Switch point adjustment For pressureless condition Material: 316L	Details
52011890	Sliding sleeve G1-1/2, 316L, 3.1 switch actuation point adjustable. Low pressure environment. Material: 316FTL51/FTL71 Switch point adjustment for pressureless condition Material: 316L Inspection cert. EN10204-3.1 material (316L wetted parts)	Details
71118693	Sliding sleeve 100 bar G1-1/2, Alloy C22, 3.1 switch actuation point adjustable. Max.Switch point adjustment. Max 100bar process pressure. :: Disassembly protect. under pressure. Material: AlloyC22. Inspection cert. EN10204-3.1 material (AlloyC22 wetted parts). Usage: FTL51, FTL51B, FTL64, FTL71, FTL81.	Details
52003979	Sliding sleeve NPT1, 316L, adjustable switching point. Low-pressure environment. Material: 316L. Applicable typeFTL51/FTL71 Switch point adjustment for pressureless condition Material: 316L	Details
52011889	Sliding sleeve NPT1, 316L, 3.1 switch actuation point adjustable. Low-pressure environment. Material: 316L.FTL51/FTL71 Switch point adjustment for pressureless condition Material: 316L Inspection cert. EN10204-3.1 material (316L wetted parts)	Details
71118694	Sliding sleeve, 100 bar, NPT1, Alloy C22, 3.1 switch actuation point adjustable. Max. 1Switch point adjustment. Max 100bar process pressure. :: Disassembly protect. under pressure. Material: AlloyC22. Inspection cert. EN10204-3.1 material (AlloyC22 wetted parts). Usage: FTL51, FTL51B, FTL64, FTL71, FTL81.	Details
52003981	sliding sleeveFTL51/FTL71 Switch point adjustment for pressureless condition Material: 316L	Details
52011891	Sliding sleeve NPT1-1/2, 316L, 3.1 switch actuation point adjustable. Low-pressure environment. Material: 3FTL51/FTL71 Switch point adjustment for pressureless condition Material: 316L Inspection cert. EN10204-3.1 material (316L wetted parts)	Details
71118695	Sliding sleeve 100 bar NPT 1-1/2, Alloy C22, 3.1 switch actuation point adjustable.Switch point adjustment. Max 100bar process pressure. :: Disassembly protect. under pressure. Material: AlloyC22. Inspection cert. EN10204-3.1 material (AlloyC22 wetted parts). Usage: FTL51, FTL51B, FTL64, FTL71, FTL81.	Details
71078875	Graphite gasket:: Replacement only in depressurised state Usage: sliding sleeve, FTL41, FTL51, FTL51B, FTL64, FTL81.	Details
52001052	weld socketFlush mount process connection FTL50/FTL50H "GQ2" Material: 316L Seal: Silicone O-ring	Details
52011897	weld socketFlush mount process connection. Material: 316L. Inspection cert. EN10204-3.1 material. Seal: silicone O-ring. FDA, 3-A compliant. additional EPDM O-ring. FDA, EHEDG, 3-A, USP Class VI compliant. Usage: FTL41, FTL43, FTL50, FTL50H, FTL51B, FTL63, FTL80, QMW43, TMR35.	Details
71093129	weld socketFlush mount process connection. Material: 316L. Inspection cert. EN10204-3.1 material Seal: silicone O-ring FDA, 3-A compliant. Additional EPDM O-ring. FDA, EHEDG, 3-A, USP Class VI compliant. Usage: FMI51, FMI52, FTI51, FTI52, FTL31, FTL20H, FTL33, FTL41, FTL43, FTL50, FTL50H, FTL51, FTL51B, FTL51H, FTL63, FTL80, FTL81, FTL260, PMP135, PTP35, PTP33B, PMP23, PMP43, PMP51, FTW23, FTW33, QMW43.	Details
71258358	Weld socket G1, d=53, 316LFlush mount process connection. Material: 316L. Seal: silicone O-ring. FDA, 3-A compliant. Additional EPDM O-ring. FDA, EHEDG, 3-A, USP Class VI compliant. Usage: FMI51, FMI52, FTI51, FTI52, FTL31, FTL33, FTL41, FTL43, FTL50, FTL50H, FTL51, FTL51H, FTL51B, FTL63, FTL80, FTL81, FTL260, FTL330H, FTL330L, PTP35, PTP33B, PMP23, PMP43, PMP51, FTW23, FTW33, QMW43.	Details
52001051	Process connection \| Weld-in G1, d=60, 316L齐平安装式过程连接 FTL260 "0", FTL20 "7", FTL20H "GEJ", FTL330H/FTL330L "G", FTL50/FTL51, FTL50H/FTL51H "GW2", FMI51/FMI52, FTI51/FTI52 "GWJ", PMP135 "N", PTP35 "BB" 材质: 316L 密封: 硅橡胶 O-ring	Details
52011896	Welding socket, G1, d=60, 3.1 material certificateFlush mount process connection FTL260 "0", FTL20H "GEJ", FTL50/FTL51, FTL50H/FTL51H "GW2", FMI51/FMI52, FTI51/FTI52 "GWJ", PMP135 "N", PTP35 "BB" Material: 316L Seal: Silicone O-ring Inspection cert. EN10204-3.1 material (316L wetted parts)	Details
52001221	weld socketFlush mount process connection FTL260 "0", FTL20 "7", FTL20H "GEJ", FTL330H/FTL330L "G", FTL50/FTL51, FTL50H/FTL51H "GW2" Liquiphant is adjustable Material: 316L Seal: Silicone O-ring	Details
52011898	weld socketFlush mount process connection FTL260 "0", FTL20H "GEJ", FTL50/FTL51, FTL50H/FTL51H "GW2" Liquiphant is adjustable Material: 316L Seal: Silicone O-ring Inspection cert. EN10204-3.1 material (316L wetted parts)	Details
71102216	mounting kitMaterial: 316L. Usage: wall/pipe mounting (2"). FMB50, FMB51, FMB52, FMB53, FMB70, FMP50, FMP51, FMP52, FMP53, FMP54, FMP55, FMP56, FMP57, PMC51, PMC71, PMP50, PMP51, PMP55, PMP71, PMP75, PMP51B, PMC51B, PMP63B, PMD55B, PMD75B, PMD78B, PMP71B, PMC71B, FTL51B, FTL62, FTL63, FTL64.	Details
71639787	Fork protection screwedUsage: marine application. Usage: FTL51B, FTL64, FTL50, FTL51, FTL70, FTL71.	Details
71639788	Fork protection screwed and slittedUsage: marine application. Usage: FTL51B, FTL64, FTL50, FTL51, FTL70, FTL71.	Details
71438291	Sunshade, plastic, XW111, suitable for models: FTL41, FTL51B, PMC51B, PFor single compartment housing. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL63, FTL64, PMC51B, PMP51B, PMD55B, PMC71B, PMD75B, PMD78B, PMD63B, PMP63B, PMP71B.	Details
71438303	SunshadeFor dual compartment housing. Usage: FMG50, FTL51B, FTL62, FTL63, FTL64, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, PMC51B, PMP51B, PMD55B, PMC71B, PMD75B, PMD78B, PMD63B, PMP63B, PMP71B, NMT81.	Details
71547886	Simulation Software USB DongleBluetooth operation of device simulation. Usage: FMG50, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, FTL51B, FTL62, FTL63, FTL64, PMC51B, PMC71B, PMD55B, PMD75B, PMP51B, PMP71B.	Details
XPRFID-	Spare RFID TAGConsists of: RFID TAG, fixing wire, crimp sleeve.	Enquire
XPSPEC-	tagged spare partsAttention: Only 1 piece per position orderable in offer/order because of item category group ZTA1. Consists of: TAG, fixing wire, crimp sleeve.	Enquire
71675402	O-ringO-ring set for weld-in adapter G1. Material: FKM. Usage: FMI51, FMI52, FTI51, FTI52, FTL31, FTL33, FTL41, FTL50, FTL50H, FTL51, FTL51B, FTL51H, FTL63, FTL80, FTL81, FTW23, FTW33, PMP43, QMW43.	Details
71675408	gasketProfile gasket for weld-in adapter RD52, G1 adjustable. Material: FKM. Usage: FTL31, FTL33, FTL41, FTL50, FTL50H, FTL51, FTL51B, FTL51H, FTL63, FTL80, FTL81.	Details
71675410	Welding protective plug for weld-on connector; G1; brass materialWelding dummy for welding the weld-in adapter G1 71258358/71093129, 52001051/52011896. Material: Brass. Usage: FMI51, FMI52, FTI51, FTI52, FTL31, FTL33, FTL41, FTL43, FTL51B, FTL60, FTL63, FTL80, FTL81, FTW23, FTW33, PTP33B, PMP23, PMP43, TMR35, TM311, TM371, TM372, TM411, TT411.	Details
71675411	Welding dummy for weld-in adapter RD52, brassWelding dummy for welding the weld-in adapter RD52 and 52001047/52006909 und G1 ausrichtbar 52001221/52011898. Material: Brass. Usage: FTL31, FTL33, FTL41, FTL43, FTL51B, FTL60, FTL63, FTL80, FTL81, PMP43, TMR35, TM311, TM371, TM372, TM411, TT411.	Details
71675413	welding boss blind plugBlind plug with inspection certificate EN10204-3.1. for closing weld-in adapter G1 71258358/71093129, 52001051/52011896. Material: AISI 316L (1.4435). Roughness (process side): Ra < 0.76 μm (29.9 μin). Silicone O-ring. Usage: FMI51, FMI52, FTI51, FTI52, FTL31, FTL33, FTL41, FTL43, FTL51B, FTL60, FTL63, FTL80, FTL81, FTW23, FTW33, PTP33B, PMP23, PMP43, TMR35, TM311, TM371, TM372, TM411, TT411.	Details
71675414	Blind plug for weld-in adapter RD52, 316L, 3.1Blind plug for closing weld-in adapter RD52 52001047/52006909 and G1 adjustable 52001221/52011898. Material: AISI 316L (1.4435). Roughness (process side): Ra < 0.76 μm (29.9 μin). Silicone profile gasket. Usage: FTL31, FTL33, FTL41, FTL43, FTL51B, FTL60, FTL63, FTL80, FTL81, PMP43, TMR35, TM311, TM371, TM372, TM411, TT411.	Details

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Measuring principle video

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21 models · click to collapse

Model	Name
FTL51B-AAA2ABAAA1AJI1VCJ	Tuning fork level switch
FTL51B-BCA4ABFAA1AJI1VBJ	Tuning fork level switch
FTL51B-AAA4ABAAA1AJI1VBJ	Tuning fork level switch
FTL51B-AAA4ACAAA2CJI1VBJLA	Tuning fork level switch
FTL51B-AAA8AAAAA2CJI1VCJLALD	Tuning fork level switch
FTL51B-BCA2ABFAA1AJI1W5JLA	Tuning fork level switch
FTL51B-AAA4BBAAA2CJI1VCJLD	Tuning fork level switch
FTL51B-AAA2AAAAA2CJI1VCJLALD	Tuning fork level switch
FTL51B-BBA7ABAAA2CJEBEZJ	Tuning fork level switch
FTL51B-BBA7ABAAA2CJEBEZJI7JAJBLD	Tuning fork level switch
FTL51B-BBGAABACA2CJEBEZJJAZ1	Tuning fork level switch
FTL51B-AAA4ABAAA3BJI1VBJJAZ1	Tuning fork level switch
FTL51B-NCA4ABFAA1AJEBEZJ+LA	Tuning fork level switch
FTL51B-NCA4ABGAA1AJI1W5J+LA	Tuning fork level switch
FTL51B-NCA4ABFAA2CJI1VBJ+LA	Tuning fork level switch
FTL51B-AAA4ABAAA1AJI1VCJ	Tuning fork level switch
FTL51B-11E7/0	Tuning fork level switch
FTL51B-1M71/0	Tuning fork level switch
FTL51B-1VH3/0	Tuning fork level switch
FTL51B-AAA4ABAAA1AJI1VCJ+LA	Tuning fork level switch

All documents for this model

12 documents · click to expand

BA Liquiphant FTL51B Chinese

Rev. 0625 64 pages

Preview

BA Liquiphant FTL51B Chinese

Rev. 0625 64 pages

Preview

BA Liquiphant FTL51B Density音叉密度计与密度计算仪QML51配套使用 Chinese

Rev. 0426 36 pages

Preview

BA Liquiphant FTL51B Density音叉密度计 Chinese

Rev. 0323 36 pages

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BA Liquiphant FTL51B Chinese

Rev. 0225 68 pages

Preview

BA Liquiphant FTL51B English

Rev. 0625 64 pages

Preview

BA Liquiphant FTL51B English

Rev. 0625 68 pages

Preview

BA Liquiphant FTL51B Density with Density Calculator QML51 English

Rev. 0426 40 pages

Preview

BA Liquiphant FTL51B Density English

Rev. 0323 36 pages

Preview

BA Liquiphant FTL51B English

Rev. 0225 76 pages

Preview

TI 焊接接头、过程转接头和法兰 Chinese

Rev. 2726 130 pages

Preview

TI Liquiphant FTL51B Chinese

Rev. 0725 52 pages

Preview

The New Liquiphant FTL51 Detects Corrosion in Advance LiquiphantFTL51, FTL51 Products · Level Liquiphant M FTL51 with FEL51 Electronics: Setup FTL51 Technical Support · Level Liquiphant M FTL51 with FEL52 Electronics: Setup FTL51 Technical Support · Level

Municipal Wastewater Treatment

Municipal Wastewater Treatment · tuning fork — Application Case

Site Conditions

This is a Municipal Wastewater Treatment customer whose plant is at the inlet, biological and outlet stages of a municipal plant. The main task was vibrating-fork point level detection and high/low alarms.

The Problem

The difficulty lies in high solids and corrosive fractions, with large diurnal flow swings; at the same time effluent parameters drift and probes foul with sludge and biofilm. Specification therefore means choosing fork length and surface finish by density and stickiness.

What We Did

We took a level range approach — level solution matched to the actual tank and silo geometry. Delivery was built around choosing fork length and surface finish by density and stickiness, with point-by-point checks on: stable compliance with Grade 1A discharge limits and online data reporting.

Operating Outcome

In service the system performs as intended — no calibration needed, with dependable switching, with routine maintenance falling noticeably.

Food & Beverage

Food & Beverage · tuning fork — Application Case

Application Context

dosing, pasteurising, filling and CIP stages is a typical Food & Beverage duty. The project started from tuning fork, focusing on vibrating-fork point level detection and high/low alarms.

Process Constraints

frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles, and syrups, dairy and beverages that scale easily, under strict hygienic requirements only amplify it. The tuning fork specification must therefore cover choosing fork length and surface finish by density and stickiness.

Delivery Approach

Delivery was handled as the level range — level solution matched to the actual tank and silo geometry. Execution centred on choosing fork length and surface finish by density and stickiness, together with food-safety and hygienic design per 3-A / EHEDG.

Field Results

Operation shows the benefit clearly — no calibration needed, with dependable switching, with confidence in this measuring point improving markedly.

Chemical & Pharmaceutical

Chemical & Pharmaceutical · tuning fork — Application Case

Customer Profile

The typical setting in Chemical & Pharmaceutical is reactors, metering vessels and finished-product tanks. The measuring point is tuning fork; the focus is vibrating-fork point level detection and high/low alarms.

Key Difficulties

Conditions are highly corrosive media with solvents and crystallisation, partly in explosive atmospheres and, on top of that, corrosion plus Ex protection shortens instrument life and makes downtime costly, which a standard configuration cannot handle for long. The design therefore starts with choosing fork length and surface finish by density and stickiness.

Implementation

The scope ran through the level range: level solution matched to the actual tank and silo geometry. Technically it hinges on choosing fork length and surface finish by density and stickiness, and on these requirements: Ex certification and GMP traceability of records.

Customer Benefit

In practice this means no calibration needed, with dependable switching, which cut the workload on the site maintenance team.

Power & Energy

Power & Energy · tuning fork — Application Case

Project Background

The project covers boiler feedwater, turbine condensate and FGD/DeNOx systems. The work centres on tuning fork and the core task is vibrating-fork point level detection and high/low alarms.

Operating Challenges

The medium and duty are characterised by high temperature and pressure with both steam and saline water, and drift under high temperature and pressure, with very costly unplanned outages. So tuning fork cannot be specified generically — it calls for choosing fork length and surface finish by density and stickiness.

Solution

The Ainstru engineering team worked through the level range: level solution matched to the actual tank and silo geometry. The configuration involves choosing fork length and surface finish by density and stickiness, with these requirements in view: compliance with power-industry codes and unit availability targets.

Results

Since start-up the system has run steadily; the practical result is no calibration needed, with dependable switching.

Endress+Hauser

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FTL51B Tuning fork level switch

Technical Data

Density

Point Level / Liquids

Spare Parts & Accessories 105

Configurator / Comparison

Measuring principle video

Related Models 20 / 21

Manuals & Documents 12

BA Liquiphant FTL51B Chinese

BA Liquiphant FTL51B Chinese

BA Liquiphant FTL51B Density音叉密度计 与密度计算仪QML51配套使用 Chinese

BA Liquiphant FTL51B Density音叉密度计 Chinese

BA Liquiphant FTL51B Chinese

BA Liquiphant FTL51B English

BA Liquiphant FTL51B English

BA Liquiphant FTL51B Density with Density Calculator QML51 English

BA Liquiphant FTL51B Density English

BA Liquiphant FTL51B English

TI 焊接接头、过程转接头和法兰 Chinese

TI Liquiphant FTL51B Chinese

Product Videos

Case Studies

Municipal Wastewater Treatment · tuning fork — Application Case

Site Conditions

The Problem

What We Did

Operating Outcome

Food & Beverage · tuning fork — Application Case

Application Context

Process Constraints

Delivery Approach

Field Results

Chemical & Pharmaceutical · tuning fork — Application Case

Customer Profile

Key Difficulties

Implementation

Customer Benefit

Power & Energy · tuning fork — Application Case

Project Background

Operating Challenges

Solution

Results

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BA Liquiphant FTL51B Density音叉密度计与密度计算仪QML51配套使用 Chinese