Prosonic S FDU92

Summary

Product identification

Product Name: Prosonic S FDU92 Type: Ultrasonic sensor for level measurement and flow measurement Manufacturer: Endress+Hauser Document Number: TI01472F/00/EN/02.21 Revision Date: 2021-05-31

Application

• Continuous, non-contact level measurement of liquids and bulk solids in:
  • Silos
  • Conveyor belts
  • Material stockpiles
  • Crushers
• Flow measurement in open flumes and measuring weirs

Operating limits

• Maximum measuring range:
  • 20 m (66 ft) in liquids
  • 10 m (33 ft) in bulk solids
• Blocking distance (BD): Signals within this range cannot be measured.
• Process Temperature:
  • Non-Ex: –40 to +95 °C (–40 to +203 °F)
  • Ex: –40 to +80 °C (–40 to +176 °F)
• Process Pressure: 0.7 to 4 bar (10.15 to 58 psi)

Feed water / Medium characteristics

• Surface conditions affecting attenuation:
  • Calm surface: 0 dB
  • Waves on surface: 5 to 10 dB
  • Very turbulent surface: 10 to 20 dB
  • Frothy surface: Contact Endress+Hauser
• Bulk solids surface attenuation:
  • Hard, rough surface (e.g., rubble): 40 dB
  • Soft surface (e.g., peat, dust-covered clinker): 40 to 60 dB
• Dust formation:
  • No dust formation: 0 dB
  • Minor dust formation: 5 dB
  • Major dust formation: 5 to 20 dB
• Filling curtain attenuation:
  • No filling curtain: 0 dB
  • Small volumes: 5 dB
  • Large volumes: 5 to 20 dB
• Temperature difference attenuation:
  • Up to 20 °C (68 °F): 0 dB
  • Up to 40 °C (104 °F): 5 to 10 dB
  • Up to 80 °C (176 °F): 10 to 20 dB

Product water / Measurement characteristics

• Integrated temperature sensor: For time-of-flight correction.
• Operating frequency: 30 kHz
• Emitting angle (typical): α = 11 °
• Maximum beam length (L max): 20 m (66 ft)
• Maximum beam radius (r max): 1.92 m (6.3 ft)

Electrical

• Supply voltage: Provided by the transmitter (FMU90 or FMU95).
• Maximum transmitter connection distance: 300 m (984 ft)
• Maximum extension cable length: 30 m (98 ft)
• Total maximum length (sensor + extension): 300 m (984 ft)
• Extension cable wire cross-section: 0.75 to 2.5 mm² (18 to 14 AWG)
• Extension cable resistance: Max. 8 Ω per wire
• Extension cable capacitance (wire to shield): Max. 60 nF
• Electromagnetic compatibility: Meets EN 61326 series and NAMUR Recommendation EMC (NE 21). Designed for use in an "industrial environment".

Mechanical / hydraulic

• Sensor housing material: PVDF
• Degree of protection: IP68 / NEMA6P (tested 24 h at 1.83 m (6 ft) under water)
• Vibration resistance: DIN EN 60068-2-64; 20 to 2,000 Hz; 1 (m/s²)²/Hz; 3x100 min
• Storage temperature: Identical to process temperature
• Dimensions: See detailed drawings in the original document.
• Weight: Approx. 2 kg (4.41 lb) (including 5 m (16 ft) cable)
• Process connection: G 1" or NPT 1"
• Counter nut material: PA6.6 (supplied for G1" rear thread)
• Seal material: EPDM

Environment

• Degree of protection: IP68 / NEMA6P
• Vibration resistance: DIN EN 60068-2-64
• Storage temperature: Identical to process temperature
• Thermal shock resistance: Based on DIN EN 60068-2-14
• Electromagnetic compatibility: EN 61326 series, NAMUR Recommendation EMC (NE 21). Class A for industrial environment.

Certificates and approvals

• CE mark
• RoHS compliant (2011/65/EU)
• RCM-Tick marking
• Ex approval: Available (refer to Product Configurator)

Accessories

• Sensor extension cable: Max. 300 m (984 ft) total length. Order No: 71027742.
• Screw-in flange: FAX50
• Cantilever arm: Available in 500 mm and 1000 mm lengths.
• Mounting frame: Available in 700 mm and 1400 mm lengths.
• Wall bracket: For cantilever arms.
• Mounting bracket: For ceiling mounting.
• FAU40 alignment unit: For aligning sensor with bulk solids surface, swivel range 15°.
• Protective housing: IP66 for RNB130 power supply unit. Order No: 51002468.

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Disclaimer: This summary is extracted from a technical document and may omit figures, footnotes, or revisions. Contractual data must be confirmed against the specific revision of the OEM PDF used for the project.

Official datasheet (PDF)

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