Specs at a glance
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Process temperature
-50 °C...+150 °C
(-58 °F...+302 °F) -
Process pressure absolute / max. overpressure limit
Vacuum...100 bar
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Min. density of medium
0.5g/cm³(0.4g/cm³ optional)
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 prevention WHG, SIL
Benefits
Use in safety systems requiring functional safety to SIL2/SIL3 in accordance with
IEC 61508/IEC 61511-1International explosion protection certificates and overfill prevention 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
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High-end products
- Highly functional and convenient
Technical excellence
Simplicity

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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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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
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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
Pipe extension up to 3 m (6 m option) -
Supply / Communication
Transmitter power supply (MUS)
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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 absolute
0...25 bar
>25..100 bar (with reduced technical data) -
Wetted parts
316L/C4
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Sensor length
115...3000 mm
>3000...6000 mm (Option) -
Output
Pulse
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Certificates / Approvals
ATEX, FM, CSA C/US, IEC Ex, TIIS, INMETRO, NEPSI
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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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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)
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 absolute / max. overpressure limit
Vacuum...100 bar
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Min. density of medium
0.5g/cm³(0.4g/cm³ optional)
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Main wetted parts
316L / Alloy
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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
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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
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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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