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Liquiphant FTL51B with Bluetooth® Technology
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Liquiphant FTL51B with LED module
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A large selection of product variants for different applications is available
Liquiphant FTL51B with Bluetooth® Technology
Specs at a glance
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Process temperature
-50 °C...+150 °C
(-58 °F...+302 °F) -
Process pressure / max. overpressure limit
Vacuum...100 bar
Vacuum...1450 psi -
Min. density of medium
0.5 g/cm³
(0.4 g/cm³ optional)
Field of application
The Liquiphant FTL51B is specialized for the process industry and developed to be used directly in SIL2 and SIL3 applications. You conduct periodic proof tests according to SIL or WHG mobile with an intuitive wizard. At the end you receive an automated documentation. Liquiphant measures reliably and is not affected by changing media properties, flow, turbulences, gas bubbles, foam, vibrations or build-up. The device is easy to use, has a digital connection and gives real-time data at hand.
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 +1450psi)
Sensor material: 316L, Alloy
International explosion protection certificates, overfill protection WHG, SIL, marine approvals
Benefits
Universal measuring principle for limit detection – proven vibronic technology
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Developed according IEC 61508 for highest safety – SIL2/3 applications (3rd party approved)
Periodic proof testing is quickly and simple organized with guided wizards via the SmartBlue-App or via a test button or magnetic pin from outside. Via digital communication you can initiate the device for a fast and easy testing of the safety loop.
Heartbeat Technology allows safe, continuous diagnostics and a simple verification, without process interruption
Centralized asset management with easy online access to all device information thanks to digital communication
Second line of defense to protect the environment
Videos
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Preventive maintenance is possible with corrosion detection via Heartbeat Technology
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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
Compact vibronic device with an optional pipe extension up to 6 m (19.7 ft);
Modular housing concept;
Wide range of certificates -
Specialities
Heartbeat Technology,
Bluetooth® Operation and maintenance SmartBlue App,
LED Module,
RFID TAG for easy identification,
Second line of defense,
Ambient temperature down to -50°C (-60°C optional),
Temperature spacer for high process temperature,
Plug and play functionalities -
Supply / Communication
19...253V AC / 2-wire,
10...55V / DC-PNP 3-wire,
9...20V DC with relay DPDT,
19...253V AC or 19...55V DC with relay DPDT,
2-wire NAMUR,
2-wire PFM,
4-20mA HART -
Ambient temperature
-60 °C...+70 °C
(-51 °F...+158 °F) -
Process temperature
-50 °C...+150 °C
(-58 °F...+302 °F) -
Process pressure / max. overpressure limit
Vacuum...100 bar
Vacuum...1450 psi -
Min. density of medium
0.5 g/cm³
(0.4 g/cm³ optional) -
Main wetted parts
316L
Alloy -
Process connection
Threads:
G3/4A, G1A, R3/4", R1, NPT3/4, NPT1
Flanges:
DN25...DN100
ASME 1"...4"
JIS 25A...100A -
Process connection hygienic
Tri-Clamp ISO2852
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Sensor length
Up to 6 m (19.7 ft)
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Communication
2-wire direct load
HART
DC-PNP 3-wire
Relays
NAMUR
PFM
Bluetooth® wireless technology -
Certificates / Approvals
ATEX, IEC Ex, CSA, NEPSI, KC, JPN Ex, INMETRO, UK Ex
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Safety approvals
Overfill protection WHG
SIL2/ SIL 3 according to IEC 61508 -
Design approvals
EN 10204-3.1
NACE MR0175, MR0103
ASME B31.3 Process Piping
AD2000
CRN
AD 2000 -
Marine approval
ABS/ LR/ BV/ DNV
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Options
Heavy duty stainless steel housing
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Components
FTL325P Interface PFM
FTL325N Interface NAMUR
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Measuring principle
Vibration Density
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Product Headline
Vibronic point level switch with optional extension tube for liquid applications in hazardous areas .
Reliable density measurement values not affected by: changing media properties, gas bubbles, foam, build-up, flow or turbulences. -
Characteristic / Application
Compact vibronic device with an optional pipe extension up to 6 m (19.7 ft),
Modular housing concept,
Wide range of certificates -
Ambient temperature
-60 °C...+70 °C
(-51 °F...+158 °F) -
Process temperature
-50 °C...+150 °C
(-58 °F...+302 °F) -
Process pressure
Vacuum...100 bar
Vacuum...1450 psi -
Wetted parts
316L
Alloy -
Sensor length
Up to 6 m (19.7 ft)
-
Certificates / Approvals
ATEX, IEC Ex, CSA, NEPSI, KC, JPN Ex, INMETRO
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Specialities
Heartbeat Technology,
Bluetooth® Operation and maintenance SmartBlue App,
LED Module,
RFID TAG for easy identification,
Second line of defense,
Ambient temperature down to -50°C (-60°C optional),
Temperature spacer for high process temperature,
Plug and play functionalities -
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
Overfill protection WHG
SIL2/ SIL 3 according to IEC 61508
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Technical Information (TI)
TI Liquiphant FTL51B
English version - 10/2025
New version available in English
Vibronic
EN 13/10/202528/06/201901/04/2019Language:
English
Version:
13/10/2025
File size:
1.9 MB
File name:
TI01403FEN_0725-00.pdf
-
-
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Operating Instruction (BA)
BA Liquiphant FTL51B
English version - 10/2025
New version available in English
Vibronic
EN 13/10/2025Language:
English
Version:
13/10/2025
File size:
1.9 MB
File name:
BA01894FEN_0625-00.pdf
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-
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Technical Information (TI)
TI Weld-in adapter, process adapter and flanges
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Technical Information (TI)
English version - 09/2023New version available in EnglishLevel, pressure and temperature measurement
EN 15/09/202328/10/202130/07/202119/06/202008/11/2019Language:
English
Version:
15/09/2023
File size:
2.9 MB
File name:
TI00426FEN_2423.pdf
-
-
-
Technical Information (TI)
TI Liquiphant FTL51B
-
Technical Information (TI)
English version - 11/2025New version available in EnglishVibronic
HART,
PROFINET over Ethernet-APLEN 28/11/202531/03/2025Language:
English
Version:
28/11/2025
File size:
1.8 MB
File name:
TI01661FEN_0725-00.pdf
-
-
-
Technical Information (TI)
TI Liquiphant FTL51B
-
Technical Information (TI)
English version - 10/2025New version available in EnglishVibronic
EN 13/10/202528/06/201901/04/2019Language:
English
Version:
13/10/2025
File size:
1.9 MB
File name:
TI01403FEN_0725-00.pdf
-
-
-
Technical Information (TI)
Liquiphant Density and Density Computer FML621 Technical Information
-
Technical Information (TI)
English version - 06/2019New version available in EnglishDensity computer for liquids
EN 28/06/2019Language:
English
Version:
28/06/2019
File size:
1.5 MB
File name:
TI01466FEN_0119.pdf
-
-
-
Technical Information (TI)
TI Liquiphant FTL51B Density with Density Calculator QML51
-
Technical Information (TI)
English version - 02/2026New version available in EnglishVibronic
EN 27/02/2026Language:
English
Version:
27/02/2026
File size:
1.3 MB
File name:
TI01878FEN_0326-00.pdf
-
-
-
Operating Instruction (BA)
BA Liquiphant FTL51B
-
Operating Instruction (BA)
English version - 10/2025New version available in EnglishVibronic
EN 13/10/2025Language:
English
Version:
13/10/2025
File size:
1.9 MB
File name:
BA01894FEN_0625-00.pdf
-
-
-
Operating Instruction (BA)
BA Liquiphant FTL51B
-
Operating Instruction (BA)
English version - 11/2025New version available in EnglishVibronic
HARTEN 28/11/202531/03/2025Language:
English
Version:
28/11/2025
File size:
1.8 MB
File name:
BA02213FEN_0625-00.pdf
-
-
-
Operating Instruction (BA)
BA Liquiphant FTL51B Density with Density Calculator QML51
-
Operating Instruction (BA)
English version - 02/2026New version available in EnglishVibronic
EN 27/02/2026Language:
English
Version:
27/02/2026
File size:
1.1 MB
File name:
BA02593FEN_0326-00.pdf
-
-
-
Operating Instruction (BA)
BA Liquiphant FTL51B
-
Operating Instruction (BA)
English version - 11/2025New version available in EnglishVibronic
PROFINET over Ethernet-APLEN 28/11/2025Language:
English
Version:
28/11/2025
File size:
2 MB
File name:
BA02338FEN_0225-00.pdf
-
-
-
Device Parameter (GP)
GP Liquiphant FTL51B
-
Device Parameter (GP)
English version - 11/2025New version available in EnglishVibronic
PROFINET over Ethernet-APLEN 28/11/2025Language:
English
Version:
28/11/2025
File size:
1.2 MB
File name:
GP01251FEN_0125-00.pdf
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