Name: Liquiphant M FTL51C
Brand: Endress+Hauser
Availability: InStock

Vibronic Point level detection Liquiphant FTL51C

Phase out

Product is getting phased out

Phase out Product status

Vibronic Point level detection Liquiphant FTL51C

New alternatives available

Successor

Liquiphant FTL62

Phase out policy
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Phase out policy

Endress+Hauser are committed to the long term support of all our products

We undertake support and service for our products for a period of ten years after notice of product withdrawal (until spareparts are not available any more)

However we reserve us the right to offer alternative solutions including replacement products if deemed more appropriated.

Product status

Product root FTL51C

Name Vibronic Point level detection Liquiphant FTL51C

Product status In phase out

Phase out date 9/2021

Order stop 2/2028

Spare sensor until not applicable

Calibration until not applicable

Spares available 5/2031

Repair until not applicable

New alternative FTL62

Maintenance advice

Point level switch for liquids with highly corrosion-resistant coating

2 videos

Vibronic measuring principle

Liquiphant with permanent function check is the safe choice for point level detection in liquids

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Vibronic Point level detection Liquiphant FTL51C

Phase out

Point level switch for liquids with highly corrosion-resistant coating

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Successors

Liquiphant FTL62

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Liquiphant FTL62

A level switch for aggressive and pumpable liquids

Benefits

Use in safety systems requiring functional safety to SIL2/SIL3 in accordance with IEC 61508/IEC 61511-1
Different plastic coating (PFA) and enamel coating for applications with aggressive medias
International explosion protection certificates and overfill protection certificate (WHG)
No calibration required, easy to start up
No mechanically moving parts: no maintenance, no wear, long operating life. Monitoring of fork for damage: guaranteed function
Second line of defense to protect the environment
Variety of standardized process connections for all applications

Services and resources

Product Support Product documentation, troubleshooting articles, device details and more.

FLEXible answers to individual needs

Current product

Vibronic Point level detection Liquiphant FTL51C

High-end products
Highly functional and convenient

What is FLEX?

FLEX selections

Technical excellence

Simplicity

Fundamental selection Meet your basic measurement needs

Lean selection Handle your core processes easily

Extended selection Optimize your processes with innovative technologies

Xpert selection Master your most challenging applications

Variable

Learn more about the FLEX selections

Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

Learn more

Warranty terms apply

The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

Services by your side

Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

Learn more

24/7 customer portal

Personalized transaction space

Check prices and delivery times, save your favorite products, create quotes and place orders in just a few clicks and track deliveries at any time. With access to your complete order and quote history including all relevant documents you benefit from full transparency throughout the entire process.

Easy access to technical documentation

Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

My Endress+Hauser – all in one place

My Endress+Hauser is your 24/7 connection to Endress+Hauser – in the office, in the field or on the go. It brings together transaction management, documentation and software downloads, knowledge base access, customer support, engineering tools and cloud‑based IIoT services helping you work easier, faster and more efficiently.

Have questions about this product?

Selection of compatible products

Nivotester FTL325P - Vibronic point level detection

Vibronic Point level detection Nivotester FTL325P

Switching unit with intrinsically safe signal circuit for connection to Liquiphant or Soliphant

Nivotester FTL325N - Vibronic point level detection

Vibronic Point level detection Nivotester FTL325N

Switching unit with NAMUR input for rail mounting or single installation

RLN22 1- or 2-channel, 24 V DC, isolating amplifier with relay signal output for systems up to SIL 2

RLN22 NAMUR isolating amplifier

NAMUR isolating amplifier, 1/2-channel with 24 V DC and NAMUR or switching contact input as well as relay output, optionally with SIL and Ex

RN42 active barrier

Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex

Spare parts and accessories

Cover

Cover F16 grey, PBTP, gasket

Cover

Order code 52025606

Drawing number 20

Cover

Cover F16 transparent, gasket

Cover

Order code 52025790

Drawing number 20

Cover

Cover F13 Ex Alu, gasket

Cover

Order code 52002698

Drawing number 20

Cover

Cover F17 Alu, gasket

Cover

Order code 52002699

Drawing number 20

Spare parts and accessories

Choose from our suggested options

Looking for more options?

Use the extended configuration to configure from all available options.

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Configuration details

Vibronic - Liquiphant FTL51C

Section	ID	Selected option
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CAD Drawings

Configuration support

Spare parts and accessories

Cover

Cover F16 grey, PBTP, gasket

Cover

Order code 52025606

Drawing number 20

Cover

Cover F16 transparent, gasket

Cover

Order code 52025790

Drawing number 20

Cover

Cover F13 Ex Alu, gasket

Cover

Order code 52002698

Drawing number 20

Cover

Cover F17 Alu, gasket

Cover

Order code 52002699

Drawing number 20

Spare parts and accessories

Selection of compatible products

Vibronic Point level detection Nivotester FTL325P

Switching unit with intrinsically safe signal circuit for connection to Liquiphant or Soliphant

Vibronic Point level detection Nivotester FTL325N

Switching unit with NAMUR input for rail mounting or single installation

RLN22 NAMUR isolating amplifier

NAMUR isolating amplifier, 1/2-channel with 24 V DC and NAMUR or switching contact input as well as relay output, optionally with SIL and Ex

RN42 active barrier

Active barrier, 1 channel for 4 to 20 mA, HART® transparent with 24 to 230 V AC/DC as well as active/passive input and output, optionally with SIL and Ex

Measuring principle	Vibration Liquids
Characteristic / Application	High protection against aggressive media by using antistatic coating Modular housing concept wide range of process connections Analogue and bus interfaces Extensive certificate range (e.g.Ex,WHG) pipe extension up to 3m (6m option)
Specialities	Foamdetection Detekt a densitychange second line of defense
Supply / Communication	PROFIBUS PA 19...253V AC, 2-wire 10...55V DC-PNP, 3-wire DPDT, 19...253V AC, 10...55V DC 8/16mA, 11...36V DC NAMUR PFM, 2-wire NAMUR with testbutton
Ambient temperature	-50 °C...+70 °C (-58 °C...+158 °F)
Process temperature	-50 °C...+150 °C (-58 °F...+302 °F) up to 230 °C / 450°F on request
Process pressure / max. overpressure limit	Vacuum...40 bar (Vacuum...580 psi)
Min. density of medium	0.5g/cm³ (0.4g/cm³ optional)
Main wetted parts	ECTFE PFA (Edlon) PFA (Rubyred) PFA (conductive) Enamel
Process connection	Flange: DN25...DN100, ASME 1"...3", JIS RF10 K 50
Process connection hygienic	FDA conform with PFA (Edlon)
Sensor length	ECTFE, PFA 130mm, 148mm...3000mm (ECTFE, PFA 5.12", 5.83"...118") Enamel 130mm, 148mm...1200mm (Enmal 5.12", 5.83"...47.24")
Communication	PROFIBUS PA 19...253V AC 10...55V DC-PNP 19...253V AC bzw 10...55V DC 8/16mA, 11...36V DC NAMUR PFM
Certificates / Approvals	ATEX, FM, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI
Safety approvals	SIL2/ SIL3
Design approvals	EN 10204-3.1
Marine approval	GL/ ABS/ DNV
Options	Heavy duty stainless steel housing mainly for the oil and gas industry
Components	FTL325P/FTL375P Interface PFM FTL325N/FTL375N Interface NAMUR
Measuring principle	Vibration Density
Characteristic / Application	Liquiphant M Density with Density Computer FML621 Temperature and pressure measurement High protection against aggressive media by using antistatic coating Modular housing concept Wide range of process connections Pipe extension up to 3 m (6 m option)
Supply / Communication	Transmitter power supply (MUS)
Ambient temperature	-50...80°C -50...60°C for hazardous applications
Process temperature	0...80 °C (validity of accuracy data) -50...0°C / 80...150 °C (with reduced technical data)
Process pressure	0...25 bar >25...40 bar (with reduced technical data)
Wetted parts	ECTFE, PFA and Enamel
Sensor length	115...3000 mm (depends by the covering)
Output	Pulse
Certificates / Approvals	ATEX, FM, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI
Specialities	Commissioning with ReadWin2000
Components	Density Computer FML621
Measuring range	Density range: 0.3 to 2 g/cm³
Other approvals and certificates	SIL2/ SIL3

Product is getting phased out

New alternatives available

Phase out policy

Product status

Vibronic Point level detection Liquiphant FTL51C

Phase out

Vibronic Point level detection Liquiphant FTL51C

Product information

Selection of compatible products

Spare parts and accessories

Choose from our suggested options

Spare parts and accessories

Selection of compatible products

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Product is getting phased out

New alternatives available

Phase out policy

Product status

Vibronic Point level detection Liquiphant FTL51C Phase out

Vibronic Point level detection Liquiphant FTL51C

Product information

Selection of compatible products

Spare parts and accessories

Choose from our suggested options

Spare parts and accessories

Selection of compatible products

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Industries

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Company

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Vibronic Point level detection Liquiphant FTL51C

Phase out