Ultrasonic measurement
Time-of-Flight
Prosonic FDU91F

Time-of-Flight measuring principle

Hygienic sensor for level and flow measurement for connection to FMU9x (measuring range up to 10m)

The FDU91F ultrasonic sensor for continuous, non-contact and maintenance-free level measurement of fluids, pastes, sludges and powdery to coarse bulk materials. Also for flow measurement in open channels and at weirs. Measurement is unaffected by dielectric constant, density or humidity and also unaffected by build-up due to the self-cleaning effect of sensors. Fully welded 316L with hygienic process connection available. Maximum measuring range in liquids 10m (33ft), solids 5m (16ft).

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Benefits
Integrated temperature sensor for Time-of-Flight correction. Accurate measurements are possible, even if temperature changes are present
Hermetically welded sensors (316L, 1.4404, 1.4435) for highest chemical resistance
Suited for rough ambient conditions...

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Integrated temperature sensor for Time-of-Flight correction. Accurate measurements are possible, even if temperature changes are present
Hermetically welded sensors (316L, 1.4404, 1.4435) for highest chemical resistance
Suited for rough ambient conditions thanks to separate installation from the transmitter
(up to 300m)
Reduced build-up formation because of the self-cleaning effect
Integrated automatic sensor detection for transmitters FMU90/FMU95 for simple commissioning
Weather resistant and flood-proof (IP 68)
Hygienic process connections available

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Field of application
Continuous, non-contact level measurement of fluids and bulk materials in silos, on belts, stockpiles or in crushers. Also for flow measurement in open channels and at weirs. Used in measurements in low structural heights.

Process connections: Thread,...

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Continuous, non-contact level measurement of fluids and bulk materials in silos, on belts, stockpiles or in crushers. Also for flow measurement in open channels and at weirs. Used in measurements in low structural heights.

Process connections: Thread, Tri-Clamp

Temperature: -40 to +105°C (-40 to +221°F)

Pressure: 0.7 to 4bar (10 to 58psi)

Max. measuring range: Liquids 10m (33ft), solids 5m (16ft)

Blocking distance: 0.3m (1ft)

International explosion protection certificates, hygienic certificates

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Features and specifications

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Details

Measuring principle

Ultrasonic
Characteristic / Application

Separated version with field housing or top hat rail housing for control cabinet instrumentation, 300 m in-between sensor and transmitter
Specialities

Specialities
Supply / Communication

4-wire (HART, Profibus DP)
Accuracy

+/- 2 mm + 0.17% of measured distance
Ambient temperature

-40 °C ... 105 °C
(-40 °F ... 221 °F)
Process temperature

-40 °C ... 105 °C

(-40 °F ... 221 °F)

CIP: 30 min: 135 °C

(30 min: 275 °F)
Process pressure absolute / max. overpressure limit

0.7 bar ... 4 bar abs
(10 psi ... 58 psi)
Main wetted parts

316L (fully welded IP68 / NEMA 6P)
Process connection

G / NPT 1", DN80 / 100, ASME 3" / 4"
Process connection hygienic

Tri-Clamp ISO2852, DN80 3 1/2", DN100 4"
Blocking distance

0.3 m (1 ft)
Application

Application
Max. measurement distance

Max. measurement distance
Communication

Transmitter:
4 ... 20 mA HART
Profibus DP
Certificates / Approvals

ATEX, FM, CSA, IEC Ex, INMETRO, NEPSI
Design approvals

EN 10204-3.1
Hygienic approvals

3A
Options

Options
Components

Transmitter:
FMU90, FMU95
Application limits

Application limits

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Measuring principle

Ultrasonic
Characteristic / Application

Separated version with field housing or top hat rail housing for control cabinet instrumentation, 300m in-between sensor and transmitter
Supply / Communication

4-wire (HART, Profibus DP)
Accuracy

+/- 2mm + 0.17% of measured distance
Ambient temperature

-40 °C ... 105 °C
(-40 °F ... 221 °F)
Process temperature

-40 °C ... 105 °C
(-40 °F ... 221 °F)
30 min: 135 °C / 275 °F)
Process pressure absolute / max. overpressure limit

0.7 bar ... 4 bar abs
(10 psi ... 58 psi)
Main wetted parts

316L (fully welded IP68 / NEMA 6P)
Process connection

G / NPT 1", DN80 / 100, ASME 3" / 4"
Process connection hygienic

Tri-Clamp ISO2852, DN80 (3 1/2"), DN100 (4")
Blocking distance

0.3 m (1 ft)
Max. measurement distance

5 m (16 ft)
Communication

Transmitter:
4 ... 20 mA HART
Profibus DP
Certificates / Approvals

ATEX, FM, CSA, IEC Ex, INMETRO, NEPSI
Design approvals

EN 10204-3.1
Options

Second 4...20 mA output
Components

Transmitter:
FMU90

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Documents / Manuals / Software

Download type

Filter

Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
Ultrasonic measuring technology

Technical Information (TI)
Alignment Unit FAU40 Technical Information
Mounting accessory for ultrasonic sensors with separate drive
electronics

Technical Information (TI)
Safety Instructions Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
Ex ma IIC T5 Gb
Ex ma IIC T6 Gb
Ex tD A20/21 IP65 T
GYJ16.1246 (NEPSI)

Ex Safety Instructions (XA)
Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95 EAC: 2Ex nA IIC T6...T3 Gc Ex tc IIIC T55...95°C Dc Safety Instructions
Ultrasonic Level Measurement

Ex Safety Instructions (XA)
Prosonic S FDU90, FDU91, FDU91F, FDU92 EAC: 1Ex ma IIC T6, T5 Gb Safety Instructions
Ultrasonic Level Measurement

Ex Safety Instructions (XA)
Safety Instructions Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
II 3 G Ex nA IIC T5 Gc (FDU90)
II 3 G Ex nA IIC T6 Gc (FDU91-93/95, FDU91F)
II 3 D Ex tc IIIC Txx°C Dc
EG 05 024

Ex Safety Instructions (XA)
Safety Instructions Prosonic S FDU90, FDU91, FDU91F, FDU92
II 2 G Ex ma IIC T5 Gb (FDU90)
II 2 G Ex ma IIC T6 Gb (FDU91, FDU91F, FDU92)
BVS 05 ATEX E 009

Ex Safety Instructions (XA)
Safety Instructions Prosonic S FDU90/91, FDU91F, FDU92/93/95
Ex ma IIC T5 Gb (FDU90)
Ex ma IIC T6 Gb (FDU91/91F/92/93/95)
Ex ta/tb IIIC Txx°C Da/Db IP65
Ex tb IIIC Txx°C Db IP65
TÜV 13.0893 X (INMETRO)

Ex Safety Instructions (XA)
Safety Instructions Prosonic S FDU90, FDU91, FDU91F, FDU92
Ex ma IIC T5 Gb
Ex ma IIC T6 Gb
GYJ16.1246 (NEPSI)

Ex Safety Instructions (XA)
Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95, FDU96
IECEx BVS 08.0012

Ex ma IIC Tx Gb

Ex ta/tb IIIC Txx°C Da/Db IP68

Ex tb IIIC Txx°C Db IP68

Ex Safety Instructions (XA)
Safety Instructions Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
II 2 G Ex ma IIC T5 Gb (FDU90)
II 2 G Ex ma IIC T6 Gb (FDU91/91F/92/93/95)
II 1/2 D Ex ta/tb IIIC Txx°C Da/Db IP68
II 2 D Ex tb IIIC Txx°C Db IP68
BVS 05 ATEX E 009

Ex Safety Instructions (XA)
Safety Instructions Prosonic S FDU90, FDU91, FDU91F, FDU92
Ex ma IIC T5 Gb (FDU90)
Ex ma IIC T6 Gb (FDU91, FDU91F, FDU92)
TÜV 13.0893 X (INMETRO)

Ex Safety Instructions (XA)
Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95 EAC: Ex ta/tb IIIC T°C Da/Db Ex tb IIIC T°C Db 1Ex ma IIC T6, T5 Gb Safety Instructions
Ultrasonic Level Measurement

Ex Safety Instructions (XA)
Prosonic S FDU90, FDU91, FDU91F, FDU92
IECEx BVS 08.0012

Ex ma IIC T5 Gb (FDU90)

Ex ma IIC T6 Gb (FDU91/91F/92)

Ex Safety Instructions (XA)
Ultrasonic Sensors
Instructions for shortening the sensor cable

Special Documentation (SD)
Application conditions for seals and plastics in the food sector Level measurement, pressure measurement Special Documentation
Application conditions for seals and plastics in the food sector

Special Documentation (SD)
Catálogo Medición y Detección de nivel
Gama de productos para aplicaciones con líquidos y sólidos

Fields of Activities (FA)

09/19

Spanish
Mesure de niveau
Aperçu des produits pour des applications dans des liquides et des
solides en vrac

Fields of Activities (FA)

03/19

fr
Füllstandmesstechnik
Produktübersicht für Anwendungen in Flüssigkeiten und Schüttgütern

Fields of Activities (FA)

03/17

German
Level measurement
Product overview for applications in liquids and bulk solids

Fields of Activities (FA)

03/17

English
Level measurement
Product overview for applications in liquids and bulk solids

Fields of Activities (FA)

03/17

English
Level measurement in polymer station with ultrasonic level sensor
For the different treatment processes, wastewater plants produce huge
amounts of sewage sludge annually. Since this must be disposed of
through landfill or incineration, it is essential to try to render
residual
sludge as dry as possible.

Case Studies (CS)

06/11

English
Prosonic S Transmitter via HART to the PlantPAx Process Automation System
System using a ControlLogix 1756 HART Analog Input Module
Integration Document

System Partner (SP)

01/09

English
Radar or ultrasonic measurement
Animation FR 1280x720 mp4

Animation

07/16

fr
Radar or ultrasonic measurement
Animation DE 960x540 mp4

Animation

07/16

German
Radar or ultrasonic measurement
Animation flv EN

Animation

06/15

English
Radar or ultrasonic measurement
Animation mp4 EN

Animation

06/15

English
Prosonic S
Product Code: FDU91F-
Declaration Number: HE_00616_01.17
Manufacturer Specification: RoHS

Manufacturer Declaration

Chinese
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-
Declaration Number: EC_00196_03.16

EU Declaration

German , English , fr
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-

EU Declaration

German , English , fr
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-
Declaration Number: EG 05 024

EU Declaration

German , English , fr
Levelflex, Micropilot, Soliphant T, Soliphant M, Solicap S, Solicap M, Prosonic S, Prosonic M, Nivector, Minicap
Product Code: FMP57-, FMP56-, FMR57-, FMR56-, FMR67-, FTM52-, FTM51-, FTM50-, FTM21-, FTM20-, FTI77-, FTI56-, FTI55-, FTC968Z-, FTC968-, FTC262-, FTC260-, FMU95-, FMU90-, FMU44-, FMU43-, FMU42-, FMU41-, FMU40-, FDU95-, FDU93-, FDU92-, FDU91F-, FDU91-, FDU90-
Region/Country: Russia (Declaration of Conformity), Russia (TR CU)
Approval Agency: EAC
Approval Number: RU D-DE.MO10.B.05551

Miscellaneous

Russian
Prosonic M, Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FMU40-, FMU41-, FMU42-, FMU43-, FMU44-, FMU90-, FMU95-
Region/Country: Russia (TR CU)
Approval Agency: EAC
Approval Number: TС RU D-DE.MU62.B.02534

Miscellaneous

Russian
Levelflex, Micropilot, Soliphant T, Soliphant M, Solicap S, Solicap M, Prosonic S, Prosonic M, Nivector, Minicap
Product Code: FMP57-, FMP56-, FMR57-, FMR56-, FMR67-, FTM52-, FTM51-, FTM50-, FTM21-, FTM20-, FTI77-, FTI56-, FTI55-, FTC968Z-, FTC968-, FTC262-, FTC260-, FMU95-, FMU90-, FMU44-, FMU43-, FMU42-, FMU41-, FMU40-, FDU95-, FDU93-, FDU92-, FDU91F-, FDU91-, FDU90-
Region/Country: Russia (Declaration of Conformity), Russia (TR CU)
Approval Agency: EAC
Approval Number: RU D-DE.MO10.B.05554

Miscellaneous

Russian
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-
Region/Country: Canada, USA
Approval Agency: CSA
Category: I,II,III 1 ABCDEFG
Protection: 6P, Exm

Explosion Protection

English
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-
Region/Country: Europe (ATEX)
Approval Agency: EXAM (DMT, BVS)
Category: II 2 D, II 2 G, II 1/2 D
Protection: Ex tb IIIC Txxx°C Db, Ex ta/tb IIIC Txxx°C Da/Db, Ex ma IIC T5 Gb, Ex ma IIC T6 Gb

Explosion Protection

German , English
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-
Approval Agency: FM
Category: I,II,III 1,2 ABCDEFG
Protection: DIP, S

Explosion Protection

English
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-
Region/Country: Brazil
Approval Agency: TÜV
Protection: Ex m, Ex tb

Explosion Protection

Portuguese
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-
Region/Country: China
Approval Agency: NEPSI
Category: zone 0, zone 20,21
Protection: Ex tD A20/A21 IP6X IIIC Txxx°C Da/Db, Ex ma II T5, Ex ma II T6

Explosion Protection

Chinese
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-
Region/Country: Brazil
Approval Agency: TÜV
Protection: Ex m, Ex tb

Explosion Protection

Portuguese
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-
Region/Country: International (IECEx)
Approval Agency: DEKRA
Protection: Ex tb IIIC Txxx°C Db, Ex ta/tb IIIC Txxx°C Da/Db, Ex ma IIC T5 Gb, Ex ma IIC T6 Gb

Explosion Protection

English
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-
Region/Country: Canada, USA
Approval Agency: CSA
Category: I/2/A,B,C,D/T5, I/2/A,B,C,D/T3C, I,II,III/1,2/A,B,C,D,E,F,G/T5, I,II,III/1,2/A,B,C,D,E,F,G/T6, II,III/1/E,F,G/T5, II,III/1/E,F,G/T3C

Explosion Protection

English
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-
Approval Agency: FM
Category: I/1,2/A,B,C,D/T5, I/1,2/A,B,C,D/T6, II,III/1,2/E,F,G/T4A

Explosion Protection

English
Prosonic S
Product Code: FDU96-, FDU95-, FDU93-, FDU92-, FDU91F-, FDU91-, FDU90-
Region/Country: Europe (ATEX)
Approval Agency: EXAM (DMT, BVS)
Category: II 2 G, II 1/2 D, II 2 D
Protection: Ex ta/tb IIIC Txx°C Da/Db IP65, Ex tb IIIC Txx°C Db IP65, Ex ma IIC T6/T5 Gb

Explosion Protection

German , English
Prosonic M, Prosonic S, Prosonic T
Product Code: FMU95-, FMU90-, FMU44-, FMU43-, FMU42-, FMU41-, FMU40-, FMU30-, FDU95-, FDU93-, FDU92-, FDU91F-, FDU91-, FDU90-
Region/Country: Russia (TR CU)
Approval Agency: EAC
Protection: Ex d [ia], Ex ia, Ex m, Ex nA, Ex t, Ex ta/tc, Ex ta/tb

Explosion Protection

Russian
Prosonic S, Nivector, Micropilot, LIQUITREND, Liquipoint, Liquiphant M, Liquicap M, Levelflex, Deltapilot S, Deltapilot M, Deltabar S, Deltabar, Ceraphant, Cerabar T, Cerabar S, Cerabar M, Cerabar
Product Code: QMW43-, PTP33B-, PMP75-, PMP55-, PMP51-, PMP23-, PMC71-, PMC51-, FTW33-, FTW23-, FTL51H-, FTL50H-, FTL33-, FDU91F-, FMB50-, FMB70-, FMD71-, FMD72-, FMD78-, FMI51-, FMP52-, FMP53-, FMR52-, FMR62-, FTI26-, FTI51-
Region/Country: USA
Approval Agency: 3-A Sanitary Standards

Hygienic Equipment

English
Micropilot S, Liquiphant S, Levelflex, Micropilot, Liquiphant M, Minicap, Nivector, Prosonic M, Prosonic S, Prosonic T, Pumpenschutz, Solicap M, Solicap S, Soliphant M, Soliphant T, SYSTEM, Liquipoint T, Liquipoint, Liquiphant FailSafe, Liquiphant, Liquicap T, Liquicap M, Einstabsonde, Dreistabsonde, Doppelstabsonde
Product Code: FTL51-, FMP54-, FMP52-, FMR52-, FMR54-, FMP57-, FMP55-, FMP51-, FMR51-, FMR57-, FMP53-, FMR56-, FMP56-, FMR53-, FMR50-, FMP50-, FMU41-, FMU42-, FTL51H-, FTL50H-, FMU43-, FMU44-, FTL51C-, FTL70-, FMU40-, FMI52-, FTL50-, FTL71-, FTM51-, FTI52-, FMR532-, FTL81-, FMI51-, FMR533-, FTI51-, FTL85-, FTM52-, FTL33-, FTL31-, FTI77-, FTI56-, FTI55-, FTC968Z-, FTC262-, FTC260-, FTL80-, FTM20-, FTM21-, FTM50-, FTW23-, FTW31-, FTW32-, FTW33-, FTW360-, NMR84-, NMR81-, 11263-, 11362Z-, 11363Z-, 11375Z-, 11961Z-, FDU90-, FDU91-, FDU91F-, FDU92-, FDU95-, FDU96-, FDU93-, FMI21-, FMU30-, FMR540-, FMR530-, FMR10-, FMR20-
Approval Agency: TÜV

Pressure Equipment

German , English
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-, FMU90-, FMU95-
Region/Country: Slovakia
Approval Agency: SMUB
Approval Number: 018/144/10

Metrology
Prosonic S
Product Code: FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-, FMU90-, FMU95-
Region/Country: Slovakia
Approval Agency: SMUB
Approval Number: 144/10-018

Metrology
Prosonic M, Prosonic S, Prosonic T
Product Code: FMU95-, FMU90-, FMU44-, FMU43-, FMU42-, FMU41-, FMU40-, FMU30-, FDU96-, FDU95-, FDU93-, FDU92-, FDU91F-, FDU91-, FDU90-
Region/Country: Kazakhstan
Approval Agency: KazInMetr
Approval Number: 12134

Metrology

Russian
Prosonic M, Prosonic S
Product Code: FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-, FMU40-, FMU41-, FMU42-, FMU43-, FMU44-, FMU90-, FMU95-
Region/Country: Russia (GOST)
Approval Agency: Rosstandart
Approval Number: OC.C.29.004.A № 50999/1

Metrology

Russian
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-
Region/Country: Canada
Approval Agency: CSA

Ordinary Location Product Safety

English