Configuring Endress Hauser FMU90-R11CA111AA3A for remote ultrasonic level, pump-control or open-channel flow duties
Industrial buyers searching for Endress Hauser FMU90-R11CA111AA3A usually need three things at the same time: correct product identity, usable technical parameters and a clear boundary around configuration-dependent options. This corrected page addresses those points without repeating administrative tables.
Level, pump and open-channel flow tasks
Application review for Endress Hauser FMU90-R11CA111AA3A should start with the actual process or machine duty. Applications include tanks, wet wells, bulk-solids storage, weirs and flumes. Sensor choice determines usable distance and process exposure, while the FMU90 code determines power, channels, relays, communication and housing.
FMU90 transmitter capabilities
The following table gives the relevant technical profile for Endress Hauser FMU90-R11CA111AA3A. It appears once on this page and separates confirmed family data from configuration-dependent details.
| Exact product reference | Endress Hauser FMU90-R11CA111AA3A |
| Product type | Endress+Hauser Prosonic S FMU90 ultrasonic transmitter configuration |
| Product family | Prosonic S FMU90 |
| Measurement principle | Ultrasonic time-of-flight transmitter |
| Sensor inputs | One or two FDU9x sensors, version-dependent |
| Relay capacity | Up to 6 relays, version-dependent |
| Outputs / communication | Up to two 4...20 mA HART or PROFIBUS DP variants |
| Supply variants | 90...253 VAC or 10.5...32 VDC |
| Reference accuracy | +/- 2 mm + 0.17% of measured distance |
| Ambient temperature | -40 to +60 deg C |
| Housing protection | IP66 field housing; IP20 DIN-rail housing |
Endress+Hauser identifies FMU90 as a one- or two-channel Prosonic S transmitter with up to six relays and HART or PROFIBUS DP variants. Exact functions depend on the complete order code.
Transmitter versus ultrasonic sensor
Endress Hauser FMU90-R11CA111AA3A is identified here as a Endress+Hauser Prosonic S FMU90 ultrasonic transmitter configuration. FMU90 is the remote transmitter and controller used with FDU9x ultrasonic sensors. Depending on configuration, it can handle level, pump or rake control and open-channel flow calculations rather than serving as the acoustic sensor itself.
Order-code inputs for a correct configuration
To obtain a technically comparable offer for Endress Hauser FMU90-R11CA111AA3A, the inquiry should go beyond price and availability. Provide the complete FMU90 suffix, sensor type, number of measuring points, supply voltage, output protocol, relay functions, housing style and hazardous-area arrangement. Existing parameter backups and linearization data are valuable for replacement.
- Keep the complete Endress Hauser FMU90-R11CA111AA3A phrase on the quotation and purchase order.
- Ask the supplier to identify inclusions, exclusions and the supporting document revision.
- Resolve technical deviations before order release rather than during receiving inspection.
FDU9x sensor relationship
Compatibility for Endress Hauser FMU90-R11CA111AA3A must be established by function and configuration, not enclosure appearance. FMU90 works with FDU9x sensors but is not interchangeable with an FDU sensor. FMU95 supports larger multi-sensor systems and should not be treated as the same configuration.
Parameter restoration and functional test
Installation planning for Endress Hauser FMU90-R11CA111AA3A should protect the existing wiring, process and configuration evidence. Confirm sensor wiring and automatic recognition, then restore measuring-point geometry, empty/full calibration, relay logic and flow tables where used. Functional tests should cover each sensor, analog output and alarm/pump relay.
Compatible Prosonic sensor family
When alternatives to Endress Hauser FMU90-R11CA111AA3A are discussed, use nearby families only as comparison points. Common companion sensors include FDU90, FDU91, FDU92, FDU93 and FDU95, selected by range, temperature, pressure and application.
FMU90 reference image

The image is used as a stock or family reference for Endress Hauser FMU90-R11CA111AA3A. Confirm the delivered label, connectors, housing and included accessories against the approved quotation.
Final order review for Endress Hauser FMU90-R11CA111AA3A
Before release, compare Endress Hauser FMU90-R11CA111AA3A with the nameplate, current manufacturer data and the installed application. Keep Endress Hauser FMU90-R11CA111AA3A on the RFQ, supplier offer, purchase order and incoming-inspection record so engineering and procurement review the same item.
