Ultrasonic measurement Time-of-Flight Prosonic FDU91 | Endress Hauser E+H

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

Specs at a glance

  • Accuracy +/- 2mm + 0.17% of measured distance
  • Process temperature -40 °C … 80 °C (-40 °F … 176 °F)
  • Process pressure / max. overpressure limit 0.7 bar … 4 bar abs (10 psi … 58 psi)
  • Max. measurement distance Liquids: 10 m (33 ft), Solids: 5 m (16 ft)
  • Main wetted parts PVDF (fully welded IP68 / NEMA 6P)

Field of application

The FDU91 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 10m (33ft), solids 5m (16ft).

Benefits

  • Integrated temperature sensor for Time-of-Flight correction. Accurate measurements are possible, even if temperature changes are present
  • Hermetically welded PVDF sensor 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)
  • Integrated heating against a build-up of ice at the sensor (optional) ensures reliable measurement

Spare parts & accessories

DescriptionCategoryDrawing No.Order Code
1Locking nuts G1, plastic PA71395801
2Wall bracket for sensor support, 316L71452323
3Sensor support 500mm, 316L71452315
4Sensor support 1000mm, 316L, US-sensor71452316
5Mounting bracket Prosonic S, Micropilot71093130
6Bracket 1400mm, 316L71452326
7Bracket 700mm, 316L71452327
8Weather protect. cover FDU90/91,FMR10/2052025686
9Extension cable FDU91/FDU92, PVC71027742
10Extension cable FDU91, PVC + heater71027746
11Screw in flange FAX50FAX50-
12Alignment device TTP FAU40FAU40-