
Specs at a glance
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Process temperature
-50 °C...+150 °C
(-58 °F...+302 °F) -
Process pressure / max. overpressure limit
Vacuum...64 bar
(Vacuum...928 psi) -
Min. density of medium
0.5g/cm³(0.4g/cm³ option)
Field of application
Liquiphant FTL50 is a point level switch for use in hazardous areas with all international certificates. Useable in all industries. FTL50 offers functional safety SIL2/SIL3. With the second line of defense the 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 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 +64bar (-14.5 to +928psi)
Sensor material: 316L, Alloy
International explosion protection certificates, overfill protection WHG, SIL, marine approvals
Benefits
Use in safety systems requiring functional safety to SIL2/SIL3 in accordance with
IEC 61508/IEC 61511-1International 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 functionSecond 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
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Vibronic measuring principle
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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

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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
-
Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable
FLEX selections | Technical excellence | Simplicity |
---|---|---|
Fundamental selection Meet your basic measurement needs |
Technical excellence
|
Simplicity
|
Lean selection Handle your core processes easily |
Technical excellence
|
Simplicity
|
Extended selection Optimize your processes with innovative technologies |
Technical excellence
|
Simplicity
|
Xpert selection Master your most challenging applications |
Technical excellence
|
Simplicity
Variable |
Predecessor
Success stories
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Measuring principle
Vibration Liquids
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Characteristic / Application
Modular housing concept
wide range of process connections
Analogue and bus interfaces
Extensive certificate range (e.g. Ex,WHG)
compact, e.g. pipes -
Specialities
Foamdetection
Detekt 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...64 bar
(Vacuum...928 psi) -
Min. density of medium
0.5g/cm³(0.4g/cm³ option)
-
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
-
Communication
PROFIBUS PA
19...253V AC
10...55V DC-PNP
19...253V AC or 10...55V DC
8/16mA, 11...36V DC
NAMUR
PFM -
Certificates / Approvals
ATEX, FM, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI
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Safety approvals
SIL2/ SIL3
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Design approvals
EN 10204-3.1
NACE MR0175, MR0103
ASME B31.3
AD2000 -
Marine approval
GL/ ABS/ DNV
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Options
Heavy duty stainless steel housing mainly for the oil and gas industry
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Components
FTL325P/FTL375P Interface PFM
FTL325N/FTL375N Interface NAMUR -
Successor
Liquiphant FTL51B
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Measuring principle
Vibration Density
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Characteristic / Application
Liquiphant M Density
with Density Computer FML621
Temperature and pressure measurement
Modular housing concept
Wide range of process connections -
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...64 bar (with reduced technical data) -
Wetted parts
316L/C4
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Sensor length
Compact: 50.5 mm
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Output
Pulse
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Certificates / Approvals
ATEX, FM, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI
-
Specialities
Commissioning with ReadWin2000
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Components
Density Computer FML621
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Other approvals and certificates
SIL2/ SIL3
-
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Technical Information (TI)
Liquiphant M FTL50, FTL51, FTL50H, FTL51H Technical Information
English version - 01/2020
New version available in English
Point level switch for all kinds of liquids
EN 10/01/202009/10/201730/11/201607/05/201504/04/2012Language:
English
Version:
10/01/2020
File size:
2.7 MB
File name:
TI00328FEN_1820.pdf
-
-
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Operating Instruction (BA)
Liquiphant M/S FTL50, FTL51, FTL50H, FTL51H, FTL51C, FTL70, FTL71 Electronic insert FEL50A PA
English version - 08/2004
New version available in English
Vibration Limit Switch Level limit switch for all liquids. Suitable for use in hazardous areas, food and pharmaceuticals
EN 10/08/2004Language:
English
Version:
10/08/2004
File size:
836 KB
File name:
BA141FEN.pdf
-
-
-
Technical Information (TI)
TI Weld-in adapter, process adapter and flanges
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Technical Information (TI)
English version - 12/2024Level, pressure and temperature measurement
EN 06/12/202425/03/202415/09/202328/10/202130/07/2021Language:
English
Version:
06/12/2024
File size:
1.3 MB
File name:
TI00426FEN_2624.pdf
-
-
-
Technical Information (TI)
Liquiphant M FTL51C Technical Information
-
Technical Information (TI)
English version - 08/2018Point level switch for all kinds of liquids
with high corrosion-resistant coatingEN 31/08/201813/02/201719/05/201029/11/2007Language:
English
Version:
31/08/2018
File size:
2 MB
File name:
TI00347FEN_1418.pdf
-
-
-
Technical Information (TI)
Liquiphant M FTL50, FTL51, FTL50H, FTL51H Technical Information
-
Technical Information (TI)
English version - 01/2020Point level switch for all kinds of liquids
EN 10/01/202009/10/201730/11/201607/05/201504/04/2012Language:
English
Version:
10/01/2020
File size:
2.7 MB
File name:
TI00328FEN_1820.pdf
-
-
-
Technical Information (TI)
Technical Information Liquiphant M Density and Density Computer FML621
-
Technical Information (TI)
English version - 10/2012Density computer for liquids
Also for use in hazardous areasEN 08/10/201212/02/200929/11/2007Language:
English
Version:
08/10/2012
File size:
800.4 KB
File name:
TI00420FEN_1312.pdf
-
-
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Operating Instruction (BA)
Liquiphant M/S FTL50, FTL51, FTL50H, FTL51H, FTL51C, FTL70, FTL71 Electronic insert FEL50A PA
-
Operating Instruction (BA)
English version - 08/2004Vibration Limit Switch
Level limit switch for all liquids.
Suitable for use in hazardous areas, food and pharmaceuticalsEN 10/08/2004Language:
English
Version:
10/08/2004
File size:
836 KB
File name:
BA141FEN.pdf
-
-
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Short Instruction (KA)
Exchange of sensor on Liquiphant M/S
-
Short Instruction (KA)
English version - 04/2012Exchange of sensor on Liquiphant M/S
EN 24/04/2012Language:
English
Version:
24/04/2012
File size:
398.2 KB
File name:
KA00529FA2_0908.pdf
-
-
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Short Instruction (KA)
Bedienungsanleitung/ Operating Instuction Liquiphant.
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Short Instruction (KA)
English version - 05/2008Sliding Sleeve
EN 01/05/200801/11/1998Language:
English
Version:
01/05/2008
File size:
314.8 KB
File name:
KA100fa6_0308.pdf
-
-
-
Short Instruction (KA)
FTL5x - Exchange of housing F13
-
Short Instruction (KA)
English version - 04/2021Liquiphant FTL5x - Exchange of housing F13
EN 15/04/2021Language:
English
Version:
15/04/2021
File size:
232.8 KB
File name:
KA00531F00_A2.pdf
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-
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Short Instruction (KA)
Liquiphant M FTL50, FTL51 Operating Instructions
-
Short Instruction (KA)
English version - 01/2017Point level switch for all kinds of liquids
EN 20/01/201729/06/201618/04/200601/04/2006Language:
English
Version:
20/01/2017
File size:
982.5 KB
File name:
KA00143FA6_1417.pdf
-
-
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Short Instruction (KA)
Liquiphant M Density FTL50, FTL51 Operating Instructions
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Short Instruction (KA)
English version - 06/2016Liquiphant M for density and concentration calculation
EN 29/06/201615/11/2007Language:
English
Version:
29/06/2016
File size:
999.4 KB
File name:
KA00284FA6_1316.pdf
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