
Specs at a glance
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Process temperature
-60 °C...+280 °C
(-76 °F...+540 °F,
(300°C / 572 °F 50h, cumulated -
Process pressure absolute / max. overpressure limit
Vacuum...100 bar
(Vacuum...1450 psi)
Field of application
Liquiphant FT70 is a point level switch for use in hazardous areas with all international certificates. FTL70 is especially designed for applications with high process temperatures up to 280°C and can be used for Safety Instrumented Systems up to SIL2, in homogeneous redundancy up to SIL3. An integrated second line of defense offers the highest degree of safety. Reliable measurement values, not affected by: changing media properties, flow, turbulences, gas bubbles, foam, vibrations or build-up.
Point level switch for all liquids.
Process connections: Threads and flanges
Temperature: -60 to +280°C (-76 to +540°F)
Pressure: -1 to +100bar (-14.5 to +1,450psi)
Sensor material: 316L, Alloy (PFA and Enamel on request)
International explosion protection certificates, overfill prevention WHG, marine approvals, SIL
Benefits
Use in safety systems requiring functional safety to SIL2 in accordance with
IEC 61508/IEC 61511-1With welded gas tight feedthrough maximum safety in the event of damaged sensor
Wide variety of electronics, e.g. NAMUR, relay, thyristor, PFM signal output: the right connection for every process control system
Large number of process connections to choose from: universal usage
No calibration: quick, low-cost start-up
No mechanically moving parts: no maintenance, no wear, long operating life.
Monitoring of fork for damage: guaranteed functionFDA approved materials (PFA Edlon)
Videos
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 |
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Fundamental selection Meet your basic measurement needs |
Technical excellence
|
Simplicity
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Lean selection Handle your core processes easily |
Technical excellence
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Simplicity
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Extended selection Optimize your processes with innovative technologies |
Technical excellence
|
Simplicity
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Xpert selection Master your most challenging applications |
Technical excellence
|
Simplicity
Variable |
Predecessor
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Technical Information (TI)
Liquiphant S FTL70, FTL71 Technical Information
English version - 02/2017
High-temperature point level switch for all kinds of liquids
EN 13/02/201709/07/201016/06/200906/10/2005Language:
English
Version:
13/02/2017
File size:
962.1 KB
File name:
TI00354FEN_1316.pdf
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Technical Information (TI)
Liquiphant S FTL70, FTL71 Technical Information
High-temperature point level switch for all kinds of liquids
EN 13/02/201709/07/201016/06/200906/10/2005Language:
English
Version:
13/02/2017
File size:
962.1 KB
File name:
TI00354FEN_1316.pdf
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Operating Instruction (BA)
Liquiphant M/S FTL50, FTL51, FTL50H, FTL51H, FTL51C, FTL70, FTL71 Electronic insert FEL50A PA
Vibration Limit Switch Level limit switch for all liquids. Suitable for use in hazardous areas, food and pharmaceuticals
EN 10/08/2004Language:
English
Version:
10/08/2004
File size:
836 KB
File name:
BA141FEN.pdf
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Short Instruction (KA)
Liquiphant S FTL70, FTL71 Operating Instructions
High-temperature pointlevel switch for all kinds of liquids
EN 20/01/201729/06/201609/07/201001/02/2006Language:
English
Version:
20/01/2017
File size:
1.1 MB
File name:
KA00172FA6_1417.pdf
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Short Instruction (KA)
Liquiphant S FTL70-########7##, FTL71-########7## Operating Instructions
High-temperature point level switch for all kinds of liquids
EN 20/01/201730/06/201631/07/201018/03/2004Language:
English
Version:
20/01/2017
File size:
1.5 MB
File name:
KA00173FA6_1417.pdf
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Short Instruction (KA)
Exchange of sensor on Liquiphant M/S
Exchange of sensor on Liquiphant M/S
EN 24/04/2012Language:
English
Version:
24/04/2012
File size:
398.2 KB
File name:
KA00529FA2_0908.pdf
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Short Instruction (KA)
Bedienungsanleitung/ Operating Instuction Liquiphant.
Sliding Sleeve
EN 01/05/200801/11/1998Language:
English
Version:
01/05/2008
File size:
314.8 KB
File name:
KA100fa6_0308.pdf
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Short Instruction (KA)
Bedienungsanleitung/ Operating Instuctions Liquiphant M/S + FEL57
Selbsttest Self test
EN 27/02/201701/03/2002Language:
English
Version:
27/02/2017
File size:
227.1 KB
File name:
KA00147FA6_1316.pdf
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Installation Instructions (EA)
Cover for housing T13 electronic compartment with sight glas Installation instruction
Liquicap M, Solicap M, Liquphant M/S/FailSafe, Soliphant M
EN 09/08/2012Language:
English
Version:
09/08/2012
File size:
158.7 KB
File name:
EA01049FA2_01.12.pdf
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Installation Instructions (EA)
Cover for housing F13 Installation instruction
Liquiphant M/S, SoliphantM, Liquicap M, Solicap M/S
EN 11/08/201409/08/2012Language:
English
Version:
11/08/2014
File size:
134.4 KB
File name:
EA01046FA2_0214.pdf
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Installation Instructions (EA)
Cover for housing T13 electronic compartment Installation instruction
Liquiphant M/S, Soliphant M, Liquicap M, Solicap M/S
EN 11/08/201409/08/2012Language:
English
Version:
11/08/2014
File size:
164.3 KB
File name:
EA01048FA2_0214.pdf
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Cover F13 Ex Alu, gasket
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Cover
Drawing numberOrder code2052002698 -
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Cover F17 Alu, gasket
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Cover
Drawing numberOrder code2052002699 -
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Cover T13 Alu, gasket EPDM
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Cover
Drawing numberOrder code2052006903 -
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Cover F16 grey, PBTP, gasket
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Cover
Drawing numberOrder code2052025606 -
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Cover F16 transparent, gasket
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Cover
Drawing numberOrder code2052025790 -
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Cover F27 316L, gasket EPDM
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Cover
Drawing numberOrder code2071114754 -
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Adapter set housing/electronics FTL5x/7x
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Housing/housing accessories
Drawing numberOrder code1252004236 -
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O-ring 71.0x3.55 EPDM, 5 pieces
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Sealing
Drawing numberOrder code2152004137 -
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Sealing set EPDM,cover F13/17/18/27,10pc
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Sealing
Drawing numberOrder code2152004277 -
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Sealing set EPDM 73.0x3.0, 10 pieces
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Sealing
Drawing numberOrder code2152008495 -
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Sealing set FVQM, cover F27, 3 pc.
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Sealing
Drawing numberOrder code2171114756 -
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Adapter set cable entry NPT1/2
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further parts
Order code52004133 -
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Adapter set cable gland M20
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further parts
Order code52004134 -
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Adapter set cable entry G1/2
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further parts
Order code52004135 -
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Cable entry G1/2, gasket
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further parts
Order code52002447 -
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Cable entry NPT1/2, gasket
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further parts
Order code52002448 -
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Cable gland M20, gasket
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further parts
Order code52004278 -
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Cable gland M20 Metal F15, gasket
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further parts
Order code71185029 -
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Cover T13 "Terminal" Alu, gasket EPDM
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Cover
Drawing numberOrder code2552007103 -
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Lubricant "SYNTHESO GLEP1" (tube a 8g)
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further parts
Order code52005977 -
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Electronics FEL51 19-253VAC
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Electronic
Drawing numberOrder code3052002304 -
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Electronics FEL52 10-55VDC-PNP
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Electronic
Drawing numberOrder code3052002305 -
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Electronics FEL54 relays DPDT
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Electronic
Drawing numberOrder code3052002306 -
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Electronics FEL55 11-36VDC
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Electronic
Drawing numberOrder code3052002307 -
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Electronics FEL56 NAMUR
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Electronic
Drawing numberOrder code3052002308 -
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Electronics FEL57 PFM
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Electronic
Drawing numberOrder code3052002309 -
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Electronics FEL58 NAMUR
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Electronic
Drawing numberOrder code3052006454 -
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Electronics FEL50A,PA,HW02.00,SW01.03.00
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Electronic
Drawing numberOrder code3071074953 -
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Modification name plate, non Ex
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further parts
Order code71067434 -
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Protection cover F16 housing
Order code71127760 -
Weather protection cover F6/F10
Order code942262-0000 -
Weather protection cover F13/F17/F18/F27
Order code71040497