
Specs at a glance
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Process temperature
-50 °C...+150 °C
(-58 °F...+302 °F)
up to 230 °C / 450°F on request -
Process pressure absolute / max. overpressure limit
Vacuum...40 bar
(Vacuum...580 psi) -
Min. density of medium
0.5g/cm³ (0.4g/cm³ optional)
Field of application
Liquiphant FTL51C is a point level switch with extension tube and highly corrosion resistant coating. 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 for all liquids with highly corrosion-resistant coating.
Process connections: Flanges and hygienic process connection (FDA conform with PFA)
Temperature: -50 to +150°C (-58 to +302°F)
Pressure: -1 to +40bar (-14.5 to +580psi)
Sensor material: ECTFE, PFA (Edlon, Rubyred, conductive), Enamel
International explosion protection certificates, overfill prevention WHG, SIL, hygienic certificates, marine approvals
Benefits
Use in safety systems requiring functional safety to SIL2/SIL3 in accordance with
IEC 61508/IEC 61511-1Different plastic coating (PFA) and enamel coating for applications with aggressive medias
International 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
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 Liquids
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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 absolute / 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)
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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
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Safety approvals
SIL2/ SIL3
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Design approvals
EN 10204-3.1
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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
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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
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)
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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 absolute
0...25 bar
>25...40 bar (with reduced technical data) -
Wetted parts
ECTFE, PFA and Enamel
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Sensor length
115...3000 mm
(depends by the covering) -
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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Measuring range
Density range: 0.3 to 2 g/cm³
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Other approvals and certificates
SIL2/ SIL3
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