Endress+Hauser
E+H ultrasonic sensor, FDU91-RG2AA
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**Product Overview** **Ultrasonic Measurement** **Time-of-Travel Principle** **Prosonic FDU91** **Ultrasonic sensor for level and flow measurement, compatible with FMU9x level transmitters (measuring range up to 10m).** **The FDU91 ultrasonic sensor is suitable for continuous, non-contact level measurement of liquids, slurries, sludge, powders, and solid lumps. It is maintenance-free and can also be used for flow measurement in open channels and measuring weirs. The measured value is unaffected by dielectric constant, density, or humidity. The sensor's self-cleaning function eliminates the influence of media adhesion on the measurement.** Suitable for use in explosion-hazardous areas; Maximum measurement range: 10m (33ft) for liquids, 5m (16ft) for solids.
Features
Built-in temperature sensor for travel time calibration.
Accurate measurements even with temperature variations.
Sealed welded PVDF sensor for the highest level of corrosion resistance measurement applications.
Suitable for use in harsh climatic conditions; sensor and transmitter can be installed separately with a maximum installation spacing of 300m.
Self-cleaning sensor function reduces adhesion formation.
Built-in automatic sensor detection; easy to connect to level transmitters FMU90/FMU95 for commissioning.
IP68 protection rating.
Optional sensor heating function to prevent icing and ensure reliable measurements.
Technical Specifications
Liquid
Measurement Principle |
Ultrasonic |
Main Features |
Detachable transmitter with field housing or top-mounted panel housing, an economical solution for water/sewage open channel flow measurement |
Measurement Error |
Measurement Accuracy, Range: ± 2mm + 0.17% of range, Range: 1mm |
Range |
Unlimited (maximum range up to 10m) |
Pressure Range |
Atmospheric Pressure |
Process Temperature |
-40...80℃ |
Electronic Component Protection |
IP68 |
Display/Operation |
Transmitter |
Output |
Transmitter: 4...20mA HART, Optional: 4...20mA Second Output |
Input |
Transmitter |
Communication |
Profibus DP, HART |
Explosion-proof Certification |
ATEX, FM, CSA |
Continuous Level Measurement
Measurement Principle |
Ultrasonic |
Features/Applications |
Separate transmitters with field housing or top-mounted panel housing, for cabinet-mounted instruments, probe and transmitter distance up to 300m |
Power/Communication |
Four-wire system (HART, Profibus DP) |
Measurement accuracy |
±2mm + 0.17% of range |
Ambient temperature |
-40…+80℃ |
Process temperature |
-40…+176℃ |
Process pressure (absolute pressure) / Maximum overpressure limit |
0.7 bar ... 4 bar abs |
Main Wetted Parts |
PVDF (Fully Insulated IP68 / NEMA 6P) |
Process Connection |
"G / NPT 1" |
Blind Zone Distance |
0.3 m |
Maximum Measurement Distance |
5 m |
Communication |
4 ... 20 mA HART, Profibus DP Transmitter |
Certificates/Certifications |
ATEX, FM, CSA |
Options |
4...20mA Second Output |
Components |
FMU90 Transmitter |
Continuous Level Measurement
Measurement Principle |
Ultrasonic |
Features/Applications |
Separate transmitter with field housing or top-mounted panel housing, for cabinet-mounted instruments, with a probe-to-transmitter distance up to 300m |
Power/Communication |
Four-wire (HART, Profibus DP) |
Measurement Accuracy |
±2mm + 0.17% of range |
Ambient Temperature |
-40…+80℃ (-40…+176℃) |
Process Temperature |
-40…+80℃(-40…+176℃) |
Process Pressure (Absolute) / Maximum Overpressure Limit |
0.7 bar ... 4 bar abs (10 psi ... 58 psi) |
Main Wetted Components |
PVDF (Fully Insulated Welded IP68 / NEMA6P) |
Process Connection |
"G / NPT 1" |
Blind Zone Distance |
0.3 m (1 ft) |
Maximum Measurement Distance |
10 m (33 ft) |
Communication |
4 ... 20 mA HART, Profibus DP Transmitter |
Certificates/Certifications |
ATEX, FM, CSA |
Options |
4...20mA Second Output |
Components |
FMU90 Transmitter |
Application Limitations |
"The minimum size for installing the short pipe is DN80 / 3"; if there are problems, please check the waveguide first; if there is a thick foam layer or large bubbles, please use a probe with higher accuracy; if there is strong adhesion or condensation, please consult Endress+Hauser; pay attention to the probe's range diagram." |
Product Applications
Suitable for continuous, non-contact level measurement of liquids, slurries, sludge, powders and solid lumps; flow measurement of open channels and measuring weirs. Maximum measurement range: Liquid: 10m, Solid: 5m; suitable for explosion-hazardous areas; other measurement ranges: FDU92: Liquid 20m, Solid: 10m; FDU93: Liquid: 25m, Solid: 15m; FDU95: Solid: 45m; FDU96: Solid: 70m.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | E+H/Endeshaus |
| Measuring Range | 0-10m |
| Blind Zone (cm) | 30 |
| Applicable Media | Liquid + Solid |
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| Brand Name: | Endress+Hauser | Certification: | ISO9001,CE |
|---|---|---|---|
| Place of Origin: | China | Condition: | New |
| Warranty: | 1 years | Customized design: | available |
What are your strengths?
Ans. Lehiy specializes in industrial automation and control components, offering fast sourcing, stable quality, and competitive prices for global customers.
What is your estimated delivery time?
Ans. Most items ship within 3–7 days. Customized or rare models may take 10–30 working days.
What are your primary product offerings?
Ans. Our main products include PLCs, sensors, valves, solenoid valves, actuators, power modules, transmitters, and complete industrial automation solutions.
How can I get in touch with you?
Ans. You can reach us anytime via Email, WhatsApp, LinkedIn, or our contact page. Our sales engineers respond quickly and provide technical support when needed.
What are your payment terms?
Ans. Standard terms are 50% TT in advance and 50% balance before delivery. We also support Alibaba Trade Assurance and L/C for qualified orders.
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