
Specs at a glance
-
Process temperature
-40 °C ... 150 °C
(-40 °F ... 302 °F) -
Process pressure absolute / max. overpressure limit
Vacuum ... 40 bar
(Vacuum ... 580 psi) -
Min. density of medium
>0,7g/cm³
(>0,5g/cm³ optional)
Field of application
Liquiphant FTL31 is a point level switch for liquids. The FTL31 is designed for industrial applications in all industries, mainly the machinery industry. The Liquiphant is used for overfill prevention or pump dry-run protection in cleaning systems. The IO-Link capability allows easy parameter setting.
Compact:
- Smallest vibronic sensor in the market
Safe:
- Continuous self-monitoring
-Reliable switching independent of media properties
Easy:
- No calibration
- Plug & play
- IO-Link connectivity
Point level switch in compact design with stainless steel housing.
Process connections: Threads
Temperature: -40 to +150°C (-40 to +302°F)
Pressure: -1 to +40bar (-14.5 to 580psi)
Surface roughness: 3.2µm
Overfill prevention and leakage detection WHG, marine approvals, final inspection report
Benefits
Designed according to highest requirements to quality and environmental sustainability. The self-monitoring Liquiphant offers safe switching also in case of power supply loss.
Independent of changing media properties an accurate switching point is offered. IO-Link reduces costs and complexity due to easy configuration of the devices via engineering tools
A real plug & play sensor is offered without any need for adjustment even with changing media. Measurement is unaffected by conductivity, build-up, turbulence, flows or air bubbles
No calibration is required, no specific know-how or tools (e.g. software) necessary
Robust design made of stainless steel (316L) assures highest durability
A modular design offers different process temperatures and the widest variety of process connections and accessories in the market to fit every application
No mechanically moved parts, free of maintenance
Videos
Fundamental selection
-
Simple products
- Easy to select, install and operate
Technical excellence
Simplicity

-
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
-
-
Operating Instruction (BA)
Liquiphant FTL31 Operating Instructions
English version - 05/2015
Point level switch for liquids
EN 15/05/201530/09/201429/09/2014Language:
English
Version:
15/05/2015
File size:
1.1 MB
File name:
BA01285FA2_0315.pdf
-
-
-
Operating Instruction (BA)
Liquiphant FTL31 IO-Link
English version - 10/2020
Point level switch for liquids
EN 05/10/202021/12/201803/12/2018Language:
English
Version:
05/10/2020
File size:
1.4 MB
File name:
BA01935FEN_0320.pdf
-
-
-
Technical Information (TI)
Liquiphant FTL31
Vibronic
EN 26/01/202130/05/201630/09/2014Language:
English
Version:
26/01/2021
File size:
1.2 MB
File name:
TI01147FEN_0421.pdf
-
-
-
Technical Information (TI)
Liquiphant FTL31 IO-Link
Point level switch for liquids
EN 25/01/202103/12/2018Language:
English
Version:
25/01/2021
File size:
1.2 MB
File name:
TI01433FEN_0221.pdf
-
-
-
Technical Information (TI)
Weld-in adapter, process adapter and flanges
Level and pressure measurement
EN 28/10/202119/06/202008/11/201917/08/201730/06/2016Language:
English
Version:
28/10/2021
File size:
2.9 MB
File name:
TI00426FEN_2321.pdf
-
-
-
Operating Instruction (BA)
Liquiphant FTL31 IO-Link
Point level switch for liquids
EN 05/10/202021/12/201803/12/2018Language:
English
Version:
05/10/2020
File size:
1.4 MB
File name:
BA01935FEN_0320.pdf
-
-
-
Operating Instruction (BA)
Liquiphant FTL31 Operating Instructions
Point level switch for liquids
EN 15/05/201530/09/201429/09/2014Language:
English
Version:
15/05/2015
File size:
1.1 MB
File name:
BA01285FA2_0315.pdf
-
-
-
ZE (Certificate)
Liquiphant FTL31, FTL33
Allgemeine bauaufsichtliche Zulassung / Allgemeine Bauartzulassung Z-65.40-532 (DIBt) für Liquiphant Leckage
EN 22/07/201917/09/2014Language:
German
Version:
22/07/2019
File size:
1.5 MB
File name:
ZE01011FDE_0219.pdf
-
-
-
ZE (Certificate)
Liquiphant FTL31, FTL33
Allgemeine bauaufsichtliche Zulassung / Allgemeine Bauartzulassung Z-65.11-531 (DIBt) für Liquiphant
EN 22/07/201917/09/2014Language:
German
Version:
22/07/2019
File size:
1.5 MB
File name:
ZE01010FDE_0219.pdf
-
-
-
Special Documentation (SD)
M12 socket
Accessories for Liquipoint, Liquitrend, Liquiphant, Ceraphant,Cerabar, Deltabar, Gammapilot
EN 29/05/2020Language:
English
Version:
29/05/2020
File size:
102.3 KB
File name:
SD02586FEN_0120.pdf
-
-
-
Special Documentation (SD)
Valve plug
Valve plug
EN 24/03/201604/07/2012Language:
English
Version:
24/03/2016
File size:
63.1 KB
File name:
SD00356FEN_0216.pdf
-
-
-
Special Documentation (SD)
Mounting hints for weld-in adapter Level and pressure measurement Special Documentation
Mounting hints for weld-in adapter
EN 28/04/2018Language:
English
Version:
28/04/2018
File size:
294.2 KB
File name:
SD01622PA3_0218.pdf
-
-
Unit is not repairable.
-
further parts
-
-
Valve Plug ISO4400 M16, 4-pole
-
further parts
Order code71280307 -
-
Valve plug ISO4400 NPTF1/2, 4-pole
-
further parts
Order code71280349 -
-
Valve plug ISO4400 QUICKON, 4-pole
-
further parts
Order code71280350 -
-
Pressure ring f.weld-in adapt.G3/4" 316L
-
further parts
Order code52027421 -
-
Sealing ring G1/2, 21x26, FA, 5 pcs.
-
further parts
Drawing numberOrder code5771194296 -
-
Sealing ring G3/4, 27x32, FA, 5 pcs.
-
further parts
Drawing numberOrder code5771185027 -
-
Sealing ring G1, 33x39 FA, 5 pcs.
-
further parts
Drawing numberOrder code5752014048 -
-
Weld-in adapter and correspondig sealings
-
further parts
-
-
Sealing ring 15,08x2,62 EPDM, 5 pcs
-
further parts
Order code71529759 -
-
O-ring 14.9x2.7 VMQ, FDA, 5 pcs.
-
further parts
Order code52021717 -
-
O-ring 14.9x2.7 VMQ, FDA, USP, 3 pcs.
-
further parts
Order code71086117 -
-
O-ring 28.17x3.53 VMQ, FDA, 5 pcs.
-
further parts
Order code52014472 -
-
O-ring 28.17x3.53 VMQ, FDA, USP, 3 pcs.
-
further parts
Order code71086102 -
-
O-ring 28.17x3.53 EPDM, FDA, USP, 3 pcs.
-
further parts
Order code71140668 -
-
Profile gasket 29x36x3.7, FDA, 5 pcs.
-
further parts
Order code52014424 -
-
Profile gasket 29x36x3.7, FDA, USP, 5pcs
-
further parts
Order code71075662 -
-
M12-female plug connector, cable side
Order code52006263 -
M12-female plug connec., 90deg, 5m cable
Order code52010285 -
M12 socket,90o,316L,IP69,LED,cable L=5m
Order code52018763 -
Socket wrench 32AF
Order code52010156 -
Test magnet
Order code71267011 -
Weld-in adapter G3/4, d=29, 316L
Order code71258357 -
Weld-in adapter G3/4, d=29, 316L, 3.1
Order code52028295 -
Weld-in adapter G3/4 d=50, 316L
Order code71258355 -
Weld-in adapter G3/4 d=50, 316L, 3.1
Order code52018765 -
Weld-in adapter G1, d=53, 316L
Order code71258358 -
Weld-in adapter G1, d=53, 316L, 3.1
Order code71093129 -
Weld-in adapter G1, d=60, 316L
Order code52001051 -
Weld-in adapter G1, d=60, 316L, 3.1
Order code52011896 -
Weld-in adapter G1, adjustable, 316L
Order code52001221 -
Weld-in adapter G1, adjustable,316L, 3.1
Order code52011898