Specs at a glance
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Accuracy
+/- 2mm + 0.17% of measured distance
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Process temperature
-40 °C ... 95 °C
(-40 °F ... 203 °F) -
Process pressure / max. overpressure limit
0.7 bar ... 3 bar abs
(10 psi ... 43 psi) -
Max. measurement distance
Liquids: 25 m (85 ft),
Solids: 15 m (50 ft) -
Main wetted parts
UP (unsaturated polyester)
Field of application
The FDU93 ultrasonic sensor for continuous, non-contact and maintenance-free level measurement of fluids, pastes, sludges and powdery to coarse bulk materials. But also for flow measurement in open channels and measuring weirs. The measurement is unaffected by dielectric constant, density or humidity and also unaffected by build-up due to the self-cleaning effect of sensors. Suited for explosion hazardous areas. Maximum measuring range in liquids 25m (85ft), solids 15m (50ft).
Sensor for continuous, non-contact level measurement of fluids and of bulk materials in silos, on belts, stockpiles and in crushers. Also for flow measurement in open channels and at weirs. Typically used in measurements in low structural heights.
Process connection: Thread
Temperature: -40 to +95°C (-40 to +203°F)
Pressure: +0.7 to +3bar (+10 to +43psi)
Maximum measuring range: Liquids 25m (85ft), solids 15m (50ft)
Blocking distance: 0.6m (2ft)
International explosion protection certificates
Benefits
Integrated temperature sensor for Time-of-Flight correction. Accurate measurements are possible, even if temperature changes are present
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)
Non-contact measurement method minimizes service requirements
International Dust-Ex and Gas-Ex certificates available
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Predecessor
Success stories
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Technical Information (TI)
FAU40 alignment unit
Installation accessory for ultrasonic or microwave sensors with cable
connectionEN Select other language 01/03/202106/09/200501/07/2003Language:
English
Version:
01/03/2021
File size:
446.3 KB
File name:
TI00179FEN_1021.pdf
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Technical Information (TI)
TI Weld-in adapter, process adapter and flanges
Level, pressure and temperature measurement
EN Select other language 06/12/202425/03/202415/09/202328/10/202130/07/2021Language:
English
Version:
06/12/2024
File size:
1.3 MB
File name:
TI00426FEN_2624.pdf
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Technical Information (TI)
Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
Ultrasonic measuring technology
EN Select other language 25/01/201808/09/201516/01/201302/04/201231/03/2011Language:
English
Version:
25/01/2018
File size:
1013 KB
File name:
TI00396FEN_1818.pdf
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Technical Information (TI)
Prosonic S FDU93
Ultrasonic measuring technology
EN Select other language 14/09/2020Language:
English
Version:
14/09/2020
File size:
683.5 KB
File name:
TI01473FEN_0120.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
Ex ma IIC T* Gb
Ex ta/tb IIIC T** Da/Db
Ex tb IIIC T** DbEN Select other language 27/06/202222/01/2015Language:
English
Version:
27/06/2022
File size:
429.4 KB
File name:
XA01343FEN_0222-00.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU93, FDU95
Ex ta/tb IIIC T**°C Da/Db X
Ex tb IIIC T**°C Db XEN Select other language 11/07/202226/03/2018Language:
English
Version:
11/07/2022
File size:
400 KB
File name:
XA01391FEN_0222-00.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU93, FDU95
Ex tD A20/21 IP65 T*
EN Select other language 10/05/202101/08/201605/03/2012Language:
English
Version:
10/05/2021
File size:
495.5 KB
File name:
XA00667FEN_0321.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
II 2 G Ex ma IIC T5 Gb
II 2 G Ex ma IIC T6 Gb
II 1/2 D Ex ta/tb IIIC Txx°C Da/Db
II 2 D Ex tb IIIC Txx°C DbLanguage:
English
Version:
20/12/2021
File size:
416.7 KB
File name:
XA02643FEN_0121-00.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
II 3 G Ex ec IIC T5 Gc
II 3 G Ex ec IIC T6 Gc
II 3 D Ex tc IIIC Txx°C DcEN Select other language 27/09/202113/04/201621/11/201301/05/2012Language:
English
Version:
27/09/2021
File size:
416.9 KB
File name:
XA00609FEN_0421.pdf
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Ex Safety Instruction (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
EN Select other language 03/12/2018Language:
English
Version:
03/12/2018
File size:
149.1 KB
File name:
XA01818FEN_0118.pdf
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Ex Safety Instruction (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 IP68EN 31/12/201001/11/2008Language:
English
Version:
31/12/2010
File size:
283.3 KB
File name:
XA00481FEN_1310.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
Ex ma IIC T5 Gb
Ex ma IIC T6 Gb
Ex tD A20/21 IP65 T*EN Select other language 10/05/202101/08/201605/03/2012Language:
English
Version:
10/05/2021
File size:
519.5 KB
File name:
XA00665FEN_0321.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
II 2 G Ex ma IIC T5 Gb
II 2 G Ex ma IIC T6 Gb
II 1/2 D Ex ta/tb IIIC Txx°C Da/Db
II 2 D Ex tb IIIC Txx°C DbEN Select other language 14/06/202113/04/201631/12/201001/07/200729/08/2006Language:
English
Version:
14/06/2021
File size:
419.4 KB
File name:
XA00322FEN_1521.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU90, FDU91, FDU91F, FDU92, FDU93, FDU95
II 3 G Ex ec IIC T5 Gc
II 3 G Ex ec IIC T6 Gc
II 3 D Ex tc IIIC Txx°C DcLanguage:
English
Version:
20/12/2021
File size:
414.5 KB
File name:
XA02645FEN_0121-00.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU93, FDU95
II 1/2 D Ex ta/tb IIIC Txx°C Da/Db
II 2 D Ex tb IIIC Txx°C DbLanguage:
English
Version:
20/12/2021
File size:
399.2 KB
File name:
XA02644FEN_0121-00.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU93, FDU95, FDU96
IECEx BVS 08.0012
Ex ta/tb IIIC Txx°C Da/Db IP68
Ex tb IIIC Txx°C Db IP68EN 31/12/201001/11/2008Language:
English
Version:
31/12/2010
File size:
213.8 KB
File name:
XA00483FEN_1310.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU93, FDU95
II 1/2 D Ex ta/tb IIIC Txx°C Da/Db
II 2 D Ex tb IIIC Txx°C DbEN Select other language 14/06/202113/04/201631/12/201001/07/200705/01/2006Language:
English
Version:
14/06/2021
File size:
395.2 KB
File name:
XA00323FEN_1521.pdf
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Ex Safety Instruction (XA)
Prosonic S FDU91, FDU91F, FDU92, FDU93, FDU95
1Ex ma IIC T5 Gb X
1Ex ma IIC T6 Gb X
Ex ta/tb IIIC T**°C Da/Db X
Ex tb IIIC T**°C Db XEN Select other language 11/07/202226/03/2018Language:
English
Version:
11/07/2022
File size:
418.5 KB
File name:
XA01721FEN_0222-00.pdf
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Fields of Activities (FA)
Level measurement
Product overview for applications in liquids and bulk solids
Language:
English
Version:
29/09/2025
File size:
48.9 MB
File name:
FA00001F00EN2625.pdf
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Fields of Activities (FA)
Misura di livello
Misura di livello
Panoramica dei prodotti per applicazioni in liquidi e solidi sfusiLanguage:
Italian
Version:
03/03/2023
File size:
46.9 MB
File name:
FA00001F00IT2522.pdf
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