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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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
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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
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Simplicity
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Xpert selection Master your most challenging applications |
Technical excellence
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Simplicity
Variable |
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Specs at a glance
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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) -
Max. measurement distance
5 m (16 ft)
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Accuracy
+/- 2mm + 0.17% of measured distance
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Main wetted parts
316L (fully welded IP68 / NEMA 6P)
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Loading alternative products
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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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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,...
Documents / Manuals / Software
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Prosonic S FDU91F
Ultrasonic measuring technology
Technical Information (TI) -
Alignment Unit FAU40
Technical Information
Mounting accessory for ultrasonic sensors with separate drive
electronicsTechnical Information (TI) -
Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
Ultrasonic measuring technology
Technical Information (TI) -
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
Ex ma IIC T5 Gb
Ex ma IIC T6 Gb
GYJ16.1246 (NEPSI)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 009Ex 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 IP68Ex 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 (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:
2Ex nA IIC T6...T3 Gc
Ex tc IIIC T55...95°C Dc
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 024Ex 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) -
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 009Ex 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) -
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) -
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)09/19Spanish -
Mesure de niveau
Aperçu des produits pour des applications dans des liquides et des
solides en vracFields of Activities (FA)03/19fr -
Level measurement
Product overview for applications in liquids and bulk solids
Fields of Activities (FA)03/17English -
Level measurement
Product overview for applications in liquids and bulk solids
Fields of Activities (FA)03/17English -
Füllstandmesstechnik
Produktübersicht für Anwendungen in Flüssigkeiten und Schüttgütern
Fields of Activities (FA)03/17German -
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)06/11English -
Prosonic S Transmitter via HART to the PlantPAx Process Automation
System
System using a ControlLogix 1756 HART Analog Input Module
Integration DocumentSystem Partner (SP)01/09English -
Radar or ultrasonic measurement
Animation DE 960x540 mp4
Animation07/16German -
Radar or ultrasonic measurement
Animation FR 1280x720 mp4
Animation07/16fr -
Radar or ultrasonic measurement
Animation mp4 EN
Animation06/15English -
Radar or ultrasonic measurement
Animation flv EN
Animation06/15English -
Prosonic S
Product Code: FDU91F-
Declaration Number: HE_00616_01.17
Manufacturer Specification: RoHSManufacturer DeclarationChinese -
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-
EU DeclarationGerman , English , fr -
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-
Declaration Number: EC_00196_03.16EU DeclarationGerman , English , fr -
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-
Declaration Number: EG 05 024EU DeclarationGerman , 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.05551MiscellaneousRussian -
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.05554MiscellaneousRussian -
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.02534MiscellaneousRussian -
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 T6Explosion ProtectionChinese -
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 GbExplosion ProtectionEnglish -
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 GbExplosion ProtectionGerman , 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/tbExplosion ProtectionRussian -
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, ExmExplosion ProtectionEnglish -
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 GbExplosion ProtectionGerman , 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/T4AExplosion ProtectionEnglish -
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-
Approval Agency: FM
Category: I,II,III 1,2 ABCDEFG
Protection: DIP, SExplosion ProtectionEnglish -
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-
Region/Country: Brazil
Approval Agency: TÜV
Protection: Ex m, Ex tbExplosion ProtectionPortuguese -
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/T3CExplosion ProtectionEnglish -
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-
Region/Country: Brazil
Approval Agency: TÜV
Protection: Ex m, Ex tbExplosion ProtectionPortuguese -
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 StandardsHygienic EquipmentEnglish -
Micropilot, Micropilot S, Minicap, Nivector, Prosonic M, Prosonic S, Prosonic T, Pumpenschutz, Solicap M, Solicap S, Soliphant M, Soliphant T, SYSTEM, Doppelstabsonde, Dreistabsonde, Einstabsonde, Levelflex, Liquicap M, Liquicap T, Liquiphant, Liquiphant FailSafe, Liquiphant M, Liquiphant S, Liquipoint, Liquipoint T, LIQUITREND
Product Code: FTL51C-, FTL51B-, FTL51-, FTL50H-, FTL50-, FTL41-, FTL33-, FTL31-, FTI77-, FTI56-, FTI55-, FTI52-, FTI51-, FTI26-, FTC968Z-, FTC262-, FTC260-, FMU44-, FMU43-, FTL51H-, FTL62-, FTL64-, FTL70-, FTL71-, FTL80-, FTL81-, FTL85-, FTM20-, FTM21-, FTM50-, FTM51-, FTM52-, FTW23-, FTW31-, FTW32-, FTW33-, NMR81-, NMR84-, QMW43-, FMU42-, 11362Z-, 11363Z-, 11371-, 11375Z-, 11961Z-, FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FMI21-, FMI51-, FMI52-, FMP50-, FMP51-, FMP52-, FMP53-, FMP54-, FMP55-, FMU41-, FMU40-, FMU30-, FMR67-, FMR62-, FMR60-, FMR57-, FMR56-, FMR540-, FMR54-, FMR532-, FMR53-, FMR52-, FMR51-, FMR50-, FMR20-, FMR10-, FMP57-, FMP56-
Approval Agency: TÜVPressure EquipmentGerman , English -
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-, FMU90-, FMU95-
Region/Country: Slovakia
Approval Agency: SMUB
Approval Number: 018/144/10Metrology -
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: 12134MetrologyRussian -
Prosonic S
Product Code: FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-, FDU96-, FMU90-, FMU95-
Region/Country: Slovakia
Approval Agency: SMUB
Approval Number: 144/10-018Metrology -
Prosonic M, Prosonic S, Prosonic T
Product Code: FMU95-, FMU90-, FMU44-, FMU43-, FMU42-, FMU41-, FMU40-, FMU30-, FDU96-, FDU95-, FDU93-, FDU92-, FDU91F-, FDU91-
Region/Country: Uzbekistan
Approval Agency: UZS
Approval Number: 02.6925MetrologyRussian -
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 № 50999/1MetrologyRussian -
Prosonic S
Product Code: FDU90-, FDU91-, FDU91F-, FDU92-, FDU93-, FDU95-
Region/Country: Canada
Approval Agency: CSAOrdinary Location Product SafetyEnglish
Accessories / Spare parts
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Order code
Unit is not repairable.
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Order code 71452315
Sensor support 500mm, 316L
Mounting Prosonic S, Mircopilot. Material: 316L. Usage: FDU90/FDU91/FDU91F/FDU92/FDU93/FDU95, FMR10, FMR20.
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Order code 71452316
Sensor support 1000mm, 316L, US-sensor
Mounting Prosonic S, Mircopilot. Material: 316L. Usage: FDU90/FDU91/FDU91F/FDU92/FDU93/FDU95, FMR10, FMR20.
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Predecessor
