E+H Prosonic FDU90 Ultrasonic Level Sensor

The Endress+Hauser Prosonic FDU90 ultrasonic level transducer is an industry-proven solution for non-contact continuous level measurement in liquid storage tanks, open flumes, storm water basins, and small bulk solids hoppers. Working in combination with the Prosonic FMU90 transmitter series, the sensor emits focused high-frequency acoustic waves that reflect off the medium surface, guaranteeing precise time-of-flight distance calculation without touching the process fluid.

Designed to operate reliably in challenging outdoor and humid industrial environments, the FDU90 incorporates an internal temperature sensor that continuously compensates for acoustic speed variations caused by ambient temperature fluctuations. Its rugged sensor housing options—including PVDF and heavy-duty IP68 enclosure constructions—provide exceptional chemical resistance against harsh weather, wastewater fumes, and corrosive splashes. Furthermore, the acoustic diaphragm features self-cleaning properties to minimize dust, condensation, and surface buildup.

Equipped with optional integrated heating features to prevent ice formation on the sensor face, the Prosonic FDU90 excels in all-weather open-channel flow metering and wastewater control applications. Whether you are outfitting a municipal treatment station or retrofitting an industrial chemical storage facility, partnering with our company ensures authentic, factory-tested instruments complete with custom order code selection support and fast global logistics.

Applications

• Water & Wastewater Treatment: Continuous monitoring of water levels in storm water basins, inlet screens, clarifiers, and equalization tanks.

• Open Channel Flow Metering: Precise flow rate calculation in flumes, weirs, and open channels in municipal and industrial drainage systems.

• Chemical & Liquid Storage: Non-contact level measurement in small storage tanks, sumps, and neutralizing pits handling water-based liquids.

• Bulk Solids Handling: Continuous level tracking in small hoppers, transfer chutes, and buffer bins containing coarse grains or gravel.

• Environmental & River Monitoring: Outdoor water level monitoring for flood prevention systems, canals, and river gauging stations.

Technical Specifications

• Measurement Principle: Ultrasonic non-contact (Time-of-Flight)

• Measuring Range in Liquids: Up to 5 m (16 ft)

• Measuring Range in Solids: Up to 2 m (6.5 ft)

• Operating Temperature Range: -40 °C to +80 °C (-40 °F to +176 °F)

• Operating Pressure Range: 0.7 bar to 4 bar absolute (10.15 psi to 58 psi)

• Process Connections: Thread G 1½” or NPT 1½”, optional slip-on flanges

• Housing Materials: PVDF / PBT or Stainless Steel

• Ingress Protection: IP68 (NEMA 6P) submersible rating or IP66/IP67

• Integrated Functions: Built-in temperature sensor for signal compensation; optional sensor face heating element

• Matching Transmitters: Fully compatible with Prosonic FMU90 transmitter series

• Certifications & Approvals: ATEX, FM, CSA, IECEx, NEPSI hazardous area approvals

FAQ

Q: Are the Endress+Hauser FDU90 sensors supplied by your company genuine brand-new items? A: Yes, as an independent international supplier, we guarantee that all instruments are 100% authentic, factory-new products complete with original serial numbers, manufacturer documentation, and standard quality certificates.

Q: Does the FDU90 sensor work as a standalone unit or does it require a controller? A: The Prosonic FDU90 is an ultrasonic transducer designed to operate in combination with a separate controller/transmitter unit, such as the Endress+Hauser Prosonic FMU90 series.

Q: What is your standard shipping lead time for international buyers? A: We hold stock for common sensor configurations and can dispatch standard orders quickly via international express couriers (DHL, FedEx, TNT). For customized part numbers, we provide clear shipping schedules upon quotation.