Vibronic
Point level detection
Liquiphant FTL51

Point level switch with extension tube for liquids in all industries

FTL51

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Specs at a glance

Process temperature

-50 °C...+150 °C
(-58 °F...+302 °F)
Process pressure / max. overpressure limit

Vacuum...100 bar
Min. density of medium

0.5g/cm³(0.4g/cm³ optional)

See all specifications

Field of application

Liquiphant FTL51 is a point level switch with extension tube for use in hazardous areas with all international certificates. Useable in all industries. FTL51 offers functional safety SIL2/SIL3. With the second line of defense highest degree of safety and availability of the device can be guaranteed. Reliable measurement values, not affected by: changing media properties, flow, turbulences, gas bubbles, foam, vibrations or build-up.

Point level switch with extension tube for all liquids.

Process connections: Threads, flanges and hygienic process connection (Tri-Clamp)
Temperature: -50 to +150°C (-58 to +302°F)
Pressure: -1 to +100bar (-14.5 to +1,450psi)
Sensor material: 316L, Alloy
International explosion protection certificates, overfill protection WHG, SIL

Benefits

Use in safety systems requiring functional safety to SIL2/SIL3 in accordance with
IEC 61508/IEC 61511-1
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
Stainless steel (316L) and high-corrosion resistant sensor material (Alloy)

Videos

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

Extended selection

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Standard products
Reliable, robust and low-maintenance

Technical excellence

Simplicity

What is FLEX?

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Specialized products
Designed for demanding applications

Technical excellence

Simplicity

Variable

What is FLEX?

FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

Learn more about the FLEX selections

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Predecessor

CS1103
CS1113
CS1203
CS1213
CS1603
CS1613
FTL51K
FTL360

FTL361
FDL30
FDL31
FTL365
FTL366
FDL35
FDL36

Success stories

Optimized logistics concept for tank systems

We implemented a highly effective logistics concept at chemicals distributors Brenntag Schweizerhall AG's Basel site.
Read the full story
Time saved, safety increased

Employees of Returkraft regularly have to fulfill and document all requirements of the SIL measuring points in the plant.
Read the full story
Fit for purpose instrumentation for CNG compressors

The Egyptian government is working to replace liquid fuels with natural gas. To achieve this they targeted increasing the number of CNG stations in their country from 306 to 1000 by the end of 2021.
Read the full story
Extend SIL proof test intervals with new Liquiphant FTL51

Discover how our customer CABB was able to extend SIL proof test intervals with the new Liquiphant FTL51
Read the full story
Basics of continuous level measurement

Common technologies available for continuous level measurement are ultrasonic, free space radar, guided wave radar, capacitance, gamma and pressure.
Read the full story

Measuring principle

Vibration Liquids
Characteristic / Application

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
Detect a densitychange
second line of defense
Supply / Communication

PROFIBUS PA
19...253V AC
10...55V DC-PNP
19...253V AC or 10...55V DC
8/16mA, 11...36V DC
NAMUR
PFM
Ambient temperature

-50 °C...+70 °C
(-58 °F...+158 °F)
Process temperature

-50 °C...+150 °C
(-58 °F...+302 °F)
Process pressure / max. overpressure limit

Vacuum...100 bar
Min. density of medium

0.5g/cm³(0.4g/cm³ optional)
Main wetted parts

316L / Alloy
Process connection

Thread:
G3/4A, G1A, R3/4", R1, NPT3/4, NPT1
Flange:
DN25...DN100,
ASME 1"...4",
JIS 25A...100A
Process connection hygienic

Tri-Clamp ISO2852
Sensor length

Length 130mm (5.12") (Liquiphant II)
148mm...6000mm (5.83"...236")
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
NACE MR0175, MR0103
ASME B31.3
AD2000
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
Successor

Liquiphant FTL51B

Measuring principle

Vibration Density
Characteristic / Application

Liquiphant M Density
with Density Computer FML621
Temperature and pressure measurement
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...70°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..100 bar (with reduced technical data)
Wetted parts

316L/C4
Sensor length

115...3000 mm
>3000...6000 mm (Option)
Output

Pulse
Certificates / Approvals

ATEX, FM, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI
Specialities

Commissioning with ReadWin2000
Components

Density Computer FML621
Other approvals and certificates

SIL2/ SIL3

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	EN
10/01/2020
09/10/2017
30/11/2016
07/05/2015
04/04/2012

Language:	English
Version:	10/01/2020
File size:	2.7 MB
File name:	TI00328FEN_1820.pdf

Language:	English
Version:	10/08/2004
File size:	836 KB
File name:	BA141FEN.pdf

	EN
10/01/2020
09/10/2017
30/11/2016
07/05/2015
04/04/2012

Language:	English
Version:	10/01/2020
File size:	2.7 MB
File name:	TI00328FEN_1820.pdf

	EN
10/08/2004

	EN
25/03/2024
15/09/2023
28/10/2021
30/07/2021
19/06/2020

	EN
31/08/2018
13/02/2017
19/05/2010
29/11/2007

	EN
08/10/2012
12/02/2009
29/11/2007

VibronicPoint level detectionLiquiphant FTL51

Point level switch with extension tube for liquids in all industries

Specs at a glance

Process temperature

Process pressure / max. overpressure limit

Min. density of medium

Field of application

Benefits

Videos

Extended selection

Predecessor

Success stories

Optimized logistics concept for tank systems

Time saved, safety increased

Fit for purpose instrumentation for CNG compressors

Extend SIL proof test intervals with new Liquiphant FTL51

Basics of continuous level measurement

Measuring principle

Characteristic / Application

Specialities

Supply / Communication

Ambient temperature

Process temperature

Process pressure / max. overpressure limit

Min. density of medium

Main wetted parts

Process connection

Process connection hygienic

Sensor length

Communication

Certificates / Approvals

Safety approvals

Design approvals

Marine approval

Options

Components

Successor

Measuring principle

Characteristic / Application

Supply / Communication

Ambient temperature

Process temperature

Process pressure

Wetted parts

Sensor length

Output

Certificates / Approvals

Specialities

Components

Other approvals and certificates

Back

Liquiphant M FTL50, FTL51, FTL50H, FTL51H Technical Information

Liquiphant M/S FTL50, FTL51, FTL50H, FTL51H, FTL51C, FTL70, FTL71 Electronic insert FEL50A PA

Liquiphant M FTL50, FTL51, FTL50H, FTL51H Technical Information

TI Weld-in adapter, process adapter and flanges

Liquiphant M FTL51C Technical Information

Technical Information Liquiphant M Density and Density Computer FML621

Liquiphant M/S FTL50, FTL51, FTL50H, FTL51H, FTL51C, FTL70, FTL71 Electronic insert FEL50A PA

FTL5x - Exchange of housing F13

FTL5x - sealing set

Bedienungsanleitung/ Operating Instuction Liquiphant.

Liquiphant M FTL50, FTL51 Operating Instructions

Liquiphant M FTL50-########7#, FTL51-########7#, Operating Instructions

Back

Cover F13 Ex Alu, gasket

Cover F17 Alu, gasket

Cover T13 Alu, gasket EPDM

Cover F16 grey, PBTP, gasket

Cover F16 transparent, gasket

Cover F15 316L, gasket

Cover F15 316L, sight glass, gasket

Cover F15, sight glass PC, 316L, gasket

Cover F27 316L, gasket EPDM

Adapter set housing/electronics FTL5x/7x

O-ring 71.0x3.55 EPDM, 5 pieces

Sealing set EPDM,cover F13/17/18/27,5pc

Sealing set EPDM 73.0x3.0, 10 pieces

Gasket 67.5x2.9x1.5 VMQ/PTFE, 5 pieces

Sealing set FVQM, cover F27, 5 pc.

Cable entry G1/2, gasket

Vibronic
Point level detection
Liquiphant FTL51