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TI396F/00/en/12.04
52024314

Technical Information

Prosonic S
FDU91, FDU92, FDU93, FDU95, FDU96

Ultrasonic sensors for non-contact continuous
level and flow measurement;
for connection to the transmitter FMU90

FDU91

FDU92

FDU93

FDU95

FDU96

Application

• Continuous, non-contact level measurement of fluids, 

pastes, sludges and powdery to coarse bulk materials

• Flow measurement in open channels and measuring 

weirs

• Maximum measuring range

– FDU91:

10 m in fluids
5 m in bulk materials

– FDU92:

20 m in fluids
10 m in bulk materials

– FDU93:

25 m in fluids
15 m in bulk materials

– FDU95:

45 m in bulk materials

– FDU96:

70 m in bulk materials

• Suited for explosion hazardous areas

Your benefits

• Non-contact measurement method, therefore almost 

independent of product properties

• Integrated temperature sensor for time-of-flight 

correction. Accurate measurements are possible, even 
if temperature changes are present

• Hermetically welded PVDF sensors FDU91/92 for 

fluid measurement; for highest chemical resistance

• Integrated automatical sensor detection for 

transmitters FMU90; simple commissioning

• Can be installed up to 300 m from the transmitter
• Suited for rough ambient conditions thanks to separate 

installation from the transmitter

• Insensitive to dirt and build-up because of the self-

cleaning effect

• Integrated heating against a build-up of ice at the 

sensor (optional)

• Weather resistant and flood-proof (IP68)
• Dust-Ex and Gas-Ex certificats available (ATEX, FM, 

CSA)

Summary of Contents for Prosonic S FDU91

Page 1: ...Suited for explosion hazardous areas Your benefits Non contact measurement method therefore almost independent of product properties Integrated temperature sensor for time of flight correction Accurat...

Page 2: ...hock resistance 11 Electromagnetic compatibility 11 Process conditions 11 Process temperature Process pressure 11 Mechanical construction 12 Dimensions 12 Weight 12 Materials 13 Connecting cable 13 Ce...

Page 3: ...volume V flow Q across measuring weirs or open channels Time of flight correction In order to compensate for temperature dependent time of flight changes a temperature sensor is integrated in every se...

Page 4: ...ming ask Endress Hauser Bulk material surface Attenuation hard rough e g rubble 40 dB soft e g peat dust covered clinker 40 60 dB Dust Attenuation no dust formation 0 dB little dust formation 5 dB hea...

Page 5: ...uency Output Signal transmission analogue voltages Auxiliary energy Power supply via transmitter FMU90 Sensor Operating frequency FDU91 43 kHz FDU92 30 kHz FDU93 27 kHz FDU95 1 low temperature version...

Page 6: ...n cable are not supplied Caution If the terminal box is installed in explosion hazardous areas then all national guidelines applicable must be observed Caution The cable screen serves as a return cabl...

Page 7: ...be used for zone separation C with a 1 sleeve welded to a grating L00 FDU9xxxx 17 00 00 xx 007 A Installation with cantilever and wall bracket B Installation with cantilever and mounting frame C The...

Page 8: ...ts through the filling curtain 3 Make sure that equipment 4 such as limit switches temperature sensors baffles etc are not located within the emitting angle Emitting angles of the individual sensors a...

Page 9: ...d joints In particular there should be no burr on the inside of the tank side nozzle end Note the specified limits for nozzle diameter and length To minimise disturbing factors we recommend an angled...

Page 10: ...nce of the channel or weir 1 Use a protective cover in order to protect the sensor from direct sun or rain A protective cover is available for the sensor FDU91 see chapter Accessories Example Khafagi...

Page 11: ...terference immunity to EN 61326 Appendix A Industrial Process conditions Process temperature Process pressure In narrow shafts with strong interference echoes we recommend using an ultrasound guide pi...

Page 12: ...DU90xxx 06 00 00 xx 001 Dimensions in mm Weight 154 ca 450 30 198 FDU96 230 110 20 70 FDU91 G1 NPT1 G1 NPT1 125 20 98 FDU92 G1 NPT1 235 25 FDU95 G1 NPT1 145 187 25 FDU93 G1 NPT1 Sensor Weight FDU91 ap...

Page 13: ...ntrol or installation drawings ZD External standards and guide lines EN 60529 Protection class of housing IP code EN 61326 Electromagnetic compatibility EMC requirements NAMUR Standards committee for...

Page 14: ...variable length up to 300 m A ft variable length up to 985 ft 035 Heater A w o heater B Connection to 24 VDC in preparation 040 Additional option A Basic version FDU91 product designation 010 Approva...

Page 15: ...e length up to 300 m A ft variable length up to 985 ft 040 Additional option A Basic version FDU93 product designation 010 Approval R Non hazardous area E ATEX II 1 2 D H ATEX II 3D P FM Cl II Div 1 G...

Page 16: ...I Div 1 Gr E G NT Ambient temperature 40 80 C 176 F in preparation T CSA Cl I II III Div 1 Gr E G HT Ambient temperature 40 140 C 284 F in preparation P FM Cl I II III Div 1 2 Gr A G HT Ambient temper...

Page 17: ...erature sensor e g FMT131 The cantilever can be mounted in the following ways by a mounting frame see below by a wall bracket see below Fixing screws are supplied Material PVDF Order code 52025686 L00...

Page 18: ...aterial Order Code 700 mm galv steel 919791 0000 700 mm 1 4301 AISI 304 919791 0001 1400 mm galv steel 919791 0002 1400 mm 1 4301 AISI 304 919791 0003 3 2 20 55 100 25 700 1400 45 76 100 200 6 5 13 33...

Page 19: ...re C An O ring in the spherical joint seals from the process D Grounding can be performed directly at the grounding screw D The alignment unit can be rotated up to 15 For further information see Techn...

Page 20: ...quired for a standard measuring task Additional functions are contained in the Descripiton of Instrument Functions BA 290F Description of Instrument Functions for transmitter FMU90 BA290F contains a d...

Page 21: ...Prosonic S FDU91 92 93 95 96 Endress Hauser 21...

Page 22: ...l Head Quarter Endress Hauser GmbH Co KG Instruments International Colmarer Str 6 79576 Weil am Rhein Deutschland Tel 49 76 21 9 75 02 Fax 49 76 21 9 75 34 5 www endress com info ii endress com TI396F...

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