Technical Data
CompareContinuous / Liquids
| Measuring Principle | Ultrasonic |
| Characteristic / Application | Separated version with Field housing or top hat rail housing for control cabinet instrumentation, up to 6 relays for pump / rake / limit control, 1 or 2 channel version |
| Specialities | Protection Class IP 66 / NEMA 4x automatic sensor recognition of FDU9x sensors option: flow measurement for open channel and weirs or additional pump control functions |
| Supply / Communication | 90 ... 253 VAC 10.5 ... 32 VDC up to 2x 4...20mA HART Profibus DP |
| Accuracy | +/- 2mm + 0.17% of measured distance |
| Ambient temperature | -40 °C ... 60 °C (-40 °F ... 140 °F) |
| Communication | up to 2x 4 ... 20 mA HART Profibus DP |
| Certificates / Approvals | ATEX, CSA |
| Options | Illuminated display, 6 line graphic display with country specific menu guidance, on-site diagnosis with envelope curve on display |
| Components | Sensors FDU9x |
Continuous / Solids
| Measuring Principle | Ultrasonic |
| Characteristic / Application | Separated version with Field housing or top hat rail housing for control cabinet instrumentation, up to 6 relays for limit control, 1 or 2 channel version |
| Specialities | Protection Class IP 66 / NEMA 4x automatic sensor recognition of FDU9x sensors |
| Supply / Communication | 90 ... 253 VAC 10.5 ... 32 VDC up to 2x 4...20mA HART Profibus DP |
| Accuracy | +/- 2mm + 0.17% of measured distance |
| Ambient temperature | -40 °C ... 60 °C (-4 °F ... 140 °F) |
| Communication | up to 2x 4 ... 20 mA HART Profibus DP |
| Certificates / Approvals | ATEX, CSA |
| Options | Illuminated display, 6 line graphic display with country specific menu guidance, on-site diagnosis with envelope curve on display |
| Components | Sensors FDU9x |
Liquids
| Measuring Principle | Ultrasonic |
| Product headline | Separated version with field housing or top hat rail housing for control cabinet instrumentation, up to 6 relays for tendency alarm, flow pulse output or backwater / sludge alarm, 1 or 2 channel version |
| Sensor features | pre-programed flow curves for typical open channel measurement |
| Degree of protection | IP66 (Fieldhousing) IP20 (top hat rail housing) |
| Display/Operation | Illuminated display, 6 line graphic display with country specific menu guidance, on-site diagnosis with envelope curve on display |
| Outputs | 4...20mA HART Optional: second 4...20 mA output (e.g. for 2 times flow measurement 1 relay (standard) Optional: 3 or 6 relays |
| Inputs | up to 2 FDU9x sensors |
| Digital communication | HART, Profibus DP |
| Hazardous area approvals | FMU allowed to operate FDU9x in Ex-zone |
The Prosonic FMU90 can be installed in the field or on a DIN rail in an instrument cabinet. It is suitable for continuous, non-contact level measurement of liquids, pastes, sludge, powders and coarse bulk solids. It can also be used for flow measurement in open channels and weirs; with a single sensor it can simultaneously measure the level and flow of stormwater overflow basins. Up to 6 relays can trigger trend alarms, flow pulse output alarms or backwater/sludge alarms, with single-channel or dual-channel versions available.
Benefits
Simple menu-guided on-site operation with a six-line plain text display, available in 15 languages
On-site envelope curve display for simple instrument fault diagnosis
The FieldCare operating software allows convenient remote operation, fault diagnosis and measuring point documentation
Time-of-flight calibration via built-in or external temperature sensor
Linearization function (up to 32 points) converts the measured value into length, volume or flow in any unit
Online calculation of channel/weir flow based on built-in flow curves
Automatic FDU9x sensor recognition function
Application areas
Level measurement: with 1 to 2 sensors for level measurement of liquids and bulk solids; measuring range up to 45 m; limit detection; pump control systems; target control systems; optional: additional pump control function; calculation: average, difference, total; Flow measurement: with 1 to 2 sensors for flow measurement in open channels and measuring weirs; return flow measurement or sludge monitoring; up to 3 totalizers and 3 counters; counter or time pulse output for external control units
Commonly used model:FMU90-R11CA111AA3A
Spare Parts & Accessories 35
35 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 52025713 | DIN rail mounting housingBasic version consists of: frame, 2 side frame and locking Din Rail Prosonic S "For E+H Service only" | Details |
| 52025695 | Mounting plateMaterial: plastics Prosonic S | Details |
| 52025702 | Circuit Board Mounting Bracketwith Torx screw, field housing Prosonic S | Details |
| 52025712 | blind coverMaterial: plastics Prosonic S | Details |
| 52025699 | Housing with displayMaterial: plastics Display cover with hinge Prosonic S | Details |
| 52025700 | CoverMaterial: plastics Blind cover with hinge Prosonic S | Details |
| 52025705 | front panelMaterial: plastics Basic version DIN rail Prosonic S | Details |
| 52025708 | front panelMaterial: plastics DIN Rail, extended Prosonic S | Details |
| 52025703 | with display panelwith display Material: plastics Basic version DIN Rail Prosonic S | Details |
| 52025710 | with display panelwith display Material: plastics DIN Rail, extended Prosonic S | Details |
| 71024576 | Field-mount housing screwconsists of: 2x hinge 4x screw | Details |
| 71024578 | screw setProsonic S | Details |
| 52025711 | panel with blind coverMaterial: plastics DIN Rail maximum version Prosonic S | Details |
| 52025721 | cableConnection cable between display and basic electronics field housing Prosonic S FMU90 | Details |
| 52025722 | cableConnection cable between display and basic electronics DIN Rail mounting Prosonic S FMU90 | Details |
| FMU90X- | FMU90X basic version electronic insertElectronics basic version FMU90X | Enquire |
| 52025714 | Output boardConnection 2 sensor FDU Prosonic S FMU90 | Details |
| 52025715 | Output BoardProsonic S FMU90 | Details |
| 52025716 | Output BoardProsonic S FMU90 | Details |
| 52025718 | Output boardfor version 3 relay FMU90 1 relay included in electronics FMU90X Prosonic S | Details |
Configurator / Comparison
Measuring principle video
Click to playManuals & Documents 12
All documents for this model12 documents · click to expand
BA Prosonic S FMU90 HART Chinese
BA Prosonic S FMU90 HART Chinese
BA Prosonic S FMU90 PROFIBUS DP Chinese
BA Prosonic S FMU90 PROFIBUS DP Chinese
BA Prosonic S FMU90 HART English
BA Prosonic S FMU90 HART English
BA Prosonic S FMU90 PROFIBUS DP English
BA Prosonic S FMU90 PROFIBUS DP English
Prosonic S FMU90 English
Prosonic S FMU90 English
Prosonic S FMU90 Description of Instrument Functions English
Prosonic S FMU90 Operating Instructions Flow HART English
Product Videos
Case Studies
Municipal Wastewater Treatment · ultrasound — Application Case
Application Context
the inlet, biological and outlet stages of a municipal plant is a typical Municipal Wastewater Treatment duty. The project started from ultrasound , focusing on ultrasonic liquid level measurement or interface detection.
Process Constraints
effluent parameters drift and probes foul with sludge and biofilm, and high solids and corrosive fractions, with large diurnal flow swings only amplify it. The ultrasound specification must therefore cover sizing range against dead zone, mounting height and medium temperature.
Delivery Approach
Delivery was handled as the level range — level solution matched to the actual tank and silo geometry. Execution centred on sizing range against dead zone, mounting height and medium temperature, together with stable compliance with Grade 1A discharge limits and online data reporting.
Field Results
Operation shows the benefit clearly — retrofit without touching the tank, with short installation time, with confidence in this measuring point improving markedly.
Food & Beverage · ultrasound — Application Case
Customer Profile
The typical setting in Food & Beverage is dosing, pasteurising, filling and CIP stages. The measuring point is ultrasound ; the focus is ultrasonic liquid level measurement or interface detection.
Key Difficulties
Conditions are syrups, dairy and beverages that scale easily, under strict hygienic requirements and, on top of that, frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles, which a standard configuration cannot handle for long. The design therefore starts with sizing range against dead zone, mounting height and medium temperature.
Implementation
The scope ran through the level range: level solution matched to the actual tank and silo geometry. Technically it hinges on sizing range against dead zone, mounting height and medium temperature, and on these requirements: food-safety and hygienic design per 3-A / EHEDG.
Customer Benefit
In practice this means retrofit without touching the tank, with short installation time, which cut the workload on the site maintenance team.
Chemical & Pharmaceutical · ultrasound — Application Case
Project Background
The project covers reactors, metering vessels and finished-product tanks. The work centres on ultrasound and the core task is ultrasonic liquid level measurement or interface detection.
Operating Challenges
The medium and duty are characterised by highly corrosive media with solvents and crystallisation, partly in explosive atmospheres, and corrosion plus Ex protection shortens instrument life and makes downtime costly. So ultrasound cannot be specified generically — it calls for sizing range against dead zone, mounting height and medium temperature.
Solution
The Ainstru engineering team worked through the level range: level solution matched to the actual tank and silo geometry. The configuration involves sizing range against dead zone, mounting height and medium temperature, with these requirements in view: Ex certification and GMP traceability of records.
Results
Since start-up the system has run steadily; the practical result is retrofit without touching the tank, with short installation time.
Power & Energy · ultrasound — Application Case
Project Overview
The site is boiler feedwater, turbine condensate and FGD/DeNOx systems. The customer wanted ultrasound properly configured on the existing plant, with the aim of ultrasonic liquid level measurement or interface detection.
Technical Challenges
What actually causes trouble is high temperature and pressure with both steam and saline water, and drift under high temperature and pressure, with very costly unplanned outages. All of this means the ultrasound configuration has to involve sizing range against dead zone, mounting height and medium temperature.
Configuration
Supply and installation were organised through the level range: level solution matched to the actual tank and silo geometry. On site this meant sizing range against dead zone, mounting height and medium temperature, checked line by line against: compliance with power-industry codes and unit availability targets.
Performance
After commissioning the outcome is retrofit without touching the tank, with short installation time, and the readings are now used for process tuning.
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