Vibronic Point level switch Liquiphant FTL71

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Specs at a glance

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 bar)
Min. density of medium

0.5g/cm³ (0.4g/cm³ optional)

See all specifications

Field of application

Liquiphant FTL71 is a point level switch with extension tube for use in hazardous areas with all international certificates. FTL71 is especially designed for applications with high process temperatures up to 280°C and can be used 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, SIL, marine approvals

Benefits

Use in safety systems requiring functional safety to SIL2 in accordance with
IEC 61508/IEC 61511-1
With welded gas-tight feed-through 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 function
FDA approved materials (PFA Edlon)

Videos

Vibronic measuring principle
Liquiphant with permanent function check is the safe choice for point level detection in liquids

Extended selection

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Standard products
Reliable, robust and low-maintenance

Technical excellence

Simplicity

What is FLEX?

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Specialized products
Designed for demanding applications

Technical excellence

Simplicity

Variable

What is FLEX?

FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

Learn more about the FLEX selections

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Predecessor

CS5603
CS5613

Success stories

Extend SIL proof test intervals with new Liquiphant FTL51

Discover how our customer CABB was able to extend SIL proof test intervals with the new Liquiphant FTL51
Read the full story
Optimized logistics concept for tank systems

We implemented a highly effective logistics concept at chemicals distributors Brenntag Schweizerhall AG's Basel site.
Read the full story
Truck loading - safety solved through trusted partnership

Endress+Hauser provides global chemical and plastics distributor with “total turnkey solution”
Read the full story

Point Level / Liquids

Measuring principle

Vibration Liquids
Characteristic / Application

Modular housing concept
High process temperatures up to 280°C
wide range of process connections
Analogue and bus interfaces
Extensive certificate range (e.g. Ex,WHG)
compact, e.g. pipes
Dual Sealing / Second line of defense
Specialities

Foam detection
Detect a density change
second line of defense
Supply / Communication

PROFIBUS PA
19...253V AC
10...55V DC-PNP
19...253V AC bzw 10...55V DC
8/16mA, 11...36V DC
NAMUR
PFM
Ambient temperature

-50 °C...+70 °C
(-58 °F...+158 °F)
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 bar)
Min. density of medium

0.5g/cm³ (0.4g/cm³ optional)
Main wetted parts

316L / Alloy
PFA and Enamel on request
Process connection

Thread:
G3/4A, G1A, R3/4", R1, NPT3/4, NPT1
Flange:
DIN DN25...DN100,
ASME 1"...4",
JIS 25A...100A
Sensor length

Length 130mm (5.12") (Liquiphant II)
148mm...3000mm / 6000mm optional
(5.83"...118" / 236" optional)
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
Safety approvals

SIL
Design approvals

EN 10204-3.1
NACE MR0175, MR0103
ASME B31.3
AD2000
Marine approval

GL/ ABS
Options

Heavy duty stainless steel housing mainly for the oil and gas industry
Components

FTL325P/FTL375P Interface PFM
FTL325N/FTL375N Interface NAMUR

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Cover
Cover F13 Ex Alu, gasket

Cover

Drawing number

Order code

20

52002698
Cover
Cover F17 Alu, gasket

Cover

Drawing number

Order code

20

52002699
Cover
Cover T13 Alu, gasket EPDM

Cover

Drawing number

Order code

20

52006903
Cover
Cover F16 grey, PBTP, gasket

Cover

Drawing number

Order code

20

52025606
Cover
Cover F16 transparent, gasket

Cover

Drawing number

Order code

20

52025790
Cover
Cover F27 316L, gasket EPDM

Cover

Drawing number

Order code

20

71114754
Housing/housing accessories
Adapter set housing/electronics FTL5x/7x

Housing/housing accessories

Drawing number

Order code

12

52004236
Sealing
O-ring 71.0x3.55 EPDM, 5 pieces

Sealing

Drawing number

Order code

21

52004137
Sealing
Sealing set EPDM,cover F13/17/18/27,10pc

Sealing

Drawing number

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21

52004277
Sealing
Sealing set EPDM 73.0x3.0, 10 pieces

Sealing

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Order code

21

52008495
Sealing
Sealing set FVQM, cover F27, 3 pc.

Sealing

Drawing number

Order code

21

71114756
further parts
Adapter set cable entry NPT1/2

further parts

Order code

52004133
further parts
Adapter set cable gland M20

further parts

Order code

52004134
further parts
Adapter set cable entry G1/2

further parts

Order code

52004135
further parts
Cable gland M20 Metal F15, gasket

further parts

Order code

71185029
Cover
Cover T13 "Terminal" Alu, gasket EPDM

Cover

Drawing number

Order code

25

52007103
further parts
Lubricant "SYNTHESO GLEP1" (tube a 8g)

further parts

Order code

52005977
Electronic
Electronics FEL51 19-253VAC

Electronic

Drawing number

Order code

30

52002304
Electronic
Electronics FEL52 10-55VDC-PNP

Electronic

Drawing number

Order code

30

52002305
Electronic
Electronics FEL54 relays DPDT

Electronic

Drawing number

Order code

30

52002306
Electronic
Electronics FEL55 11-36VDC

Electronic

Drawing number

Order code

30

52002307
Electronic
Electronics FEL56 NAMUR

Electronic

Drawing number

Order code

30

52002308
Electronic
Electronics FEL57 PFM

Electronic

Drawing number

Order code

30

52002309
Electronic
Electronics FEL58 NAMUR

Electronic

Drawing number

Order code

30

52006454
Electronic
Electronics FEL50A,PA,HW02.00,SW01.03.00

Electronic

Drawing number

Order code

30

71074953
further parts
Modification name plate, non Ex

further parts

Order code

71067434
further parts
Sealing ring G1, 33x39 FA, 5 pcs.

further parts

Drawing number

Order code

57

52014048
further parts
Sealing ring G1-1/2, 48x55 FA, 5 pcs.

further parts

Drawing number

Order code

57

52014047
further parts
Sliding sleeve 100bar NPT1, AlloyC22,3.1

further parts

Order code

71118694

Protection cover F16 housing

Order code

71127760
Weather protection cover F13/F17/F18/F27

Order code

71040497
Weather protection cover F6/F10

Order code

942262-0000
Sliding sleeve 100bar G1, AlloyC22, 3.1

Order code

71118691
Sliding sleeve 100bar G1, 316L

Order code

52003663
Sliding sleeve 100bar G1, 316L, 3.1

Order code

52011880
Sliding sleeve 100bar G1, AlloyC4

Order code

52003664
Sliding sleeve 100bar G1-1/2, 316L

Order code

52003665
Sliding sleeve 100bar G1-1/2, 316L, 3.1

Order code

52011882
Sliding sleeve 100bar G1-1/2, AlloyC4

Order code

52003666
Sliding sleeve NPT1, 316L, 3.1

Order code

52011889

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Often bought together

Accessories

Protection cover F16 housing

Weather protection cover F13/F17/F18/F27

See more accessories

VibronicPoint level switchLiquiphant FTL71

Point level switch with extension tube for liquids in high-temperature applications

Specs at a glance

Process temperature

Process pressure absolute / max. overpressure limit

Min. density of medium

Field of application

Benefits

Videos

Extended selection

Predecessor

Success stories

Extend SIL proof test intervals with new Liquiphant FTL51

Optimized logistics concept for tank systems

Truck loading - safety solved through trusted partnership

Measuring principle

Characteristic / Application

Specialities

Supply / Communication

Ambient temperature

Process temperature

Process pressure absolute / max. overpressure limit

Min. density of medium

Main wetted parts

Process connection

Sensor length

Communication

Certificates / Approvals

Safety approvals

Design approvals

Marine approval

Options

Components

Cover F13 Ex Alu, gasket

Cover F17 Alu, gasket

Cover T13 Alu, gasket EPDM

Cover F16 grey, PBTP, gasket

Cover F16 transparent, gasket

Cover F27 316L, gasket EPDM

Adapter set housing/electronics FTL5x/7x

O-ring 71.0x3.55 EPDM, 5 pieces

Sealing set EPDM,cover F13/17/18/27,10pc

Sealing set EPDM 73.0x3.0, 10 pieces

Sealing set FVQM, cover F27, 3 pc.

Adapter set cable entry NPT1/2

Adapter set cable gland M20

Adapter set cable entry G1/2

Cable gland M20 Metal F15, gasket

Cover T13 "Terminal" Alu, gasket EPDM

Lubricant "SYNTHESO GLEP1" (tube a 8g)

Electronics FEL51 19-253VAC

Electronics FEL52 10-55VDC-PNP

Electronics FEL54 relays DPDT

Electronics FEL55 11-36VDC

Electronics FEL56 NAMUR

Electronics FEL57 PFM

Electronics FEL58 NAMUR

Electronics FEL50A,PA,HW02.00,SW01.03.00

Modification name plate, non Ex

Sealing ring G1, 33x39 FA, 5 pcs.

Sealing ring G1-1/2, 48x55 FA, 5 pcs.

Sliding sleeve 100bar NPT1, AlloyC22,3.1

Protection cover F16 housing

Weather protection cover F13/F17/F18/F27

Weather protection cover F6/F10

Sliding sleeve 100bar G1, AlloyC22, 3.1

Sliding sleeve 100bar G1, 316L

Sliding sleeve 100bar G1, 316L, 3.1

Sliding sleeve 100bar G1, AlloyC4

Sliding sleeve 100bar G1-1/2, 316L

Sliding sleeve 100bar G1-1/2, 316L, 3.1

Sliding sleeve 100bar G1-1/2, AlloyC4

Sliding sleeve NPT1, 316L, 3.1

VibronicPoint level detectionNivotester FTL325P

VibronicPoint level detectionNivotester FTL325N

RN221NActive barrier with optional HART® diagnosis

Input

Output

RLN22 isolating amplifier

Input

Vibronic
Point level switch
Liquiphant FTL71

Vibronic
Point level detection
Nivotester FTL325P

Vibronic
Point level detection
Nivotester FTL325N

RN221N
Active barrier with optional HART® diagnosis