Specs at a glance
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Process temperature
-60°C...+280°C
(-76°F...+540°F) -
Process pressure / max. overpressure limit
Vacuum...100 bar
(1450 psi) -
Min. density of medium
Density from 0.4 g/cm3
(0.4 SGU)
Field of application
Liquiphant FTL81 is a point level switch for use in hazardous areas with all international certificates. FailSafe overfill protection in applications with functional safety up to SIL3 with one device. Reliable measurement values, not affected by: changing media properties, flow, turbulences, gas bubbles, foam, vibrations or build-up.
Point level switch for liquids up to SIL3.
Process connections: Threads and flanges
Temperature: -60 to +280°C (-76 to +540°F)
Pressure: -1 to +100bar (-14.5 to +1,450psi)
Sensor length: Extension pipe up to 3m (9.8ft)
Sensor material: 316L, Alloy C
International explosion protection certificates, overfill protection WHG, SIL, marine approvals
Benefits
Use in safety systems requiring functional safety to SIL3 in accordance with DIN EN IEC 61508 Ed.2.0 and DIN EN ISO 13849
Proof test: proof testing interval up to 12 years, Slave devices tested at the press of a button
Permanent self-monitoring/internal redundancy
4-20mA interface (acc. to NAMUR NE 06/NE 43): easy integration via the switching unit (Nivotester FailSafe FTL825) with a two-channel output (safety contacts) and locking function or direct integration into a safety PLC
No adjustment: quick, low-cost startup
No mechanically moving parts: no maintenance, no wear, long operating life
Monitoring of fork for damage, corrosion, build-up and mechanical blocking
Videos
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Vibronic measuring principle
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Functional safety SIL in process instrumentation
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Liquiphant with permanent function check is the safe choice for point level detection in liquids
Xpert selection
-
Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable
-
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
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Measuring principle
Vibration Liquids
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Characteristic / Application
Reliable point level switch with extension pipe for MIN and MAX safety applications up to SIL3.
Dual Sealing / Second line of defense
Modular housing concept -
Specialities
Outstanding features:
- permanent LIVE signal
monitors function safety
- failsafe design and
- high availability of the measuring values -
Supply / Communication
2-wire 4...20 mA
-
Ambient temperature
-60°C...+70°C
(-76°F...+160°F) -
Process temperature
-60°C...+280°C
(-76°F...+540°F) -
Process pressure / max. overpressure limit
Vacuum...100 bar
(1450 psi) -
Min. density of medium
Density from 0.4 g/cm3
(0.4 SGU) -
Main wetted parts
316L
Alloy C -
Process connection
Flange:
DN25...DN100,
ASME 1"...4",
JIS 10K...20K
Thread:
G3/4, G1, R3/4,
R1, MNPT3/4, MNPT1 -
Sensor length
Extension pipe up to 3 m (9.8 ft)
-
Communication
2-wire 4...20 mA
-
Certificates / Approvals
ATEX, FM, CSA, CSA C/US, IEC Ex, NEPSI, EAC
-
Safety approvals
Overfill protection WHG
Leakage Detection
SIL3 -
Design approvals
EN 10204-3.1
NACE MR0175, MR0103
ASME B31.3
AD2000 -
Marine approval
GL/ ABS/ LR/ BV/ DNV
-
Options
PWIS free
Pressure tight feed through
Weather protection -
Components
Nivotester FTL825, Transmitter
-
-
Technical Information (TI)
TI Liquiphant FailSafe FTL81
-
Technical Information (TI)
English version - 01/2026New version available in EnglishVibronic
EN 12/01/2026Language:
English
Version:
12/01/2026
File size:
1.2 MB
File name:
TI01880FEN_0126-00.pdf
-
-
-
Technical Information (TI)
Weld-in adapter, process adapter and flanges
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Technical Information (TI)
English version - 10/2021New version available in EnglishLevel and pressure measurement
EN 28/10/202130/07/2021Language:
English
Version:
28/10/2021
File size:
2.9 MB
File name:
TI00426FEN_2321.pdf
-
-
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Operating Instruction (BA)
BA Liquiphant FailSafe FTL81
-
Operating Instruction (BA)
English version - 01/2026New version available in EnglishVibronic
EN 12/01/2026Language:
English
Version:
12/01/2026
File size:
1.6 MB
File name:
BA02596FEN_0126-00.pdf
-
-
-
Short Instruction (KA)
KA Liquiphant FailSafe FTL81
-
Short Instruction (KA)
English version - 01/2026New version available in EnglishVibronic
EN 12/01/202612/02/2025Language:
English
Version:
12/01/2026
File size:
982.5 KB
File name:
KA01748FEN_0226-00.pdf
-
-
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Installation Instructions (EA)
Cover for housing T13 terminal compartment Installation instruction
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Installation Instructions (EA)
English version - 02/2022New version available in EnglishLiquiphant M/S, Soliphant M, Liquicap M, Solicap M/S
EN 24/02/2022Language:
English
Version:
24/02/2022
File size:
119 KB
File name:
EA01050FA2_0322.pdf
-
-
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Ex Safety Instruction (XA)
Safety Instructions Liquiphant FailSafe FTL80, FTL81, FTL85
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Ex Safety Instruction (XA)
English version - 07/2013New version available in EnglishATEX: II 1/2 G Ex ia IIC T6 Ga/Gb, II 1/2 G Ex d IIC T6 Ga/Gb
IECEx: Ex ia IIC T6 Ga/Gb, Ex d IIC T6 Ga/GbEN 03/07/2013Language:
English
Version:
03/07/2013
File size:
619.1 KB
File name:
XA00654FA3_0213.pdf
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-
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ZE (Certificate)
RFID TAG Certificate/Declaration of Conformity
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ZE (Certificate)
English version - 08/2015New version available in EnglishATEX:
II 2 G Ex ia IIC T6 Gb
II 2 D Ex ia IIIC T80°C Db;
IECEx:
Ex ia IIC T6 Gb
Ex ia IIIC T80°C Db
EPS 15 ATEX 1 1009 X; IECEx EPS 15.0040XEN 20/08/2015Language:
English
Version:
20/08/2015
File size:
2.2 MB
File name:
ZE01020FA2_0115.pdf
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-
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Special Documentation (SD)
Manuel de sécurité fonctionnelle Liquiphant FailSafe FTL80/81/85 avec Nivotester FailSafe FTL825
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Special Documentation (SD)
French version - 02/2014New version available in EnglishSystème de mesure de limite de niveau avec signal de sortie 4 à 20 mA ou
relaisLanguage:
French
Version:
17/02/2014
File size:
1.1 MB
File name:
SD00350FFR_0513.pdf
-
-
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Special Documentation (SD)
RFID TAG Special Documentation
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Special Documentation (SD)
English version - 08/2015New version available in EnglishRFID TAG
Special DocumentationEN 12/08/2015Language:
English
Version:
12/08/2015
File size:
331 KB
File name:
SD01502FA2_0215.pdf
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Special Documentation (SD)
SD Tagging
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Special Documentation (SD)
English version - 04/2024New version available in EnglishLevel and pressure measuring instruments
EN 15/04/2024Language:
English
Version:
15/04/2024
File size:
806.1 KB
File name:
SD03128PEN_0224-00.pdf
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