Specs at a glance
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Process temperature
-40 °C ... 80 °C
(-40 °F ... 176 °F) -
Process pressure absolute / max. overpressure limit
0.7 bar ... 4 bar abs
(10 psi ... 58 psi) -
Max. measurement distance
Max. measurement distance
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Accuracy
+/- 2mm + 0.17% of measured distance
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Main wetted parts
PVDF (IP68 / NEMA6P)
Field of application
The FDU90 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 3m (9.8ft), solids 1.2m (3.9ft).
Sensor for continuous, non-contact level measurement of fluids and bulk materials in silos, on belts, stockpiles and in crushers. Also flow measurement in open channels and at weirs. Typically used in measurements in low structural heights.
Process connection: Thread
Temperature: -40 to +80°C (-40 to +176°F)
Pressure: +0.7 to +4bar (+10 to +58psi)
Maximum measuring range: Liquids 3m (9.8ft), solids 1.2m (3.9ft)
Blocking distance: 0.07m (0.23ft)
International explosion protection certificates
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
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Standard products
- Reliable, robust and low-maintenance
Technical excellence
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Specialized products
- Designed for demanding applications
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| FLEX selections | Technical excellence | Simplicity |
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Fundamental selection Meet your basic measurement needs |
Technical excellence
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Lean selection Handle your core processes easily |
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further parts
Unit is not repairable.
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Locking nuts G1, plastic PA
Order code71395801 -
Extension cable FDU91/FDU92, PVC
Order code71027742 -
Extension cable FDU91, PVC + heater
Order code71027746 -
Flooding protection tube FDU90
Order code71091216 -
Wall bracket for sensor support, 316L
Order code71452323 -
Bracket 1400mm, 316L
Order code71452326 -
Bracket 700mm, 316L
Order code71452327 -
Alignment device TTP FAU40
Order codeFAU40- -
Screw in flange FAX50
Order codeFAX50- -
Sensor support 500mm, 316L
Order code71452315 -
Sensor support 1000mm, 316L, US-sensor
Order code71452316 -
Mounting bracket Prosonic S, Micropilot
Order code71093130 -
Mounting bracket adjustable, 316L
Order code71325079 -
Weather protect. cover FDU90/91,FMR10/20
Order code52025686
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