Specs at a glance
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Accuracy
+/- 2mm + 0.17% of measured distance
Field of application
Prosonic FMU90 separated version with field housing or top hat rail housing for control cabinet instrumentation are suited for continuous, non-contact level measurement of fluids, pastes, sludge and powdery to coarse bulk solids. Also the flow measurement in open channels and weirs is possible as the simultaneous measurement of level and flow in a storm water overflow basin with only 1 sensor. Up to 6 relays for tendency alarm, flow pulse output or backwater/sludge alarm, 1 or 2 channel version.
Level measurement of fluids and bulk materials with 1 or 2 sensors for measuring of up to 45m (148ft) and level limit detection. Pump control, rake control and as option: additional pump control function.
Calculations: Average, difference, sum
Application flow: Flow measurement in open channels and weirs with 1 or 2 sensors
Flow measurement with back water or sludge detection
Up to 3 totalizers and 3 counters
Counting or time pulse output for control of external units
Benefits
Simple, menu-guided operation with 6-line plain text display, 15 languages selectable
Envelope curves on the display for quick and simple diagnosis
Easy operation, diagnosis and measuring point documentation with the supplied "FieldCare" operating program
Time-of-Flight correction via integrated or external temperature sensors
Linearisation (up to 32 points, freely configurable) for the most common flumes and weirs
pre-programmed and selectableOnline calculation of the flume-/weir-flows via integrated flow curves
Automatic detection of the sensors FDU9x
Videos
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Time-of-Flight measuring principle
Xpert selection
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable

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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable
FLEX selections | Technical excellence | Simplicity |
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Fundamental selection Meet your basic measurement needs |
Technical excellence
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Simplicity
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Lean selection Handle your core processes easily |
Technical excellence
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Simplicity
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Extended selection Optimize your processes with innovative technologies |
Technical excellence
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Simplicity
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Xpert selection Master your most challenging applications |
Technical excellence
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Simplicity
Variable |
Predecessor
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Measuring principle
Ultrasonic
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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
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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
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Ambient temperature
-40 °C ... 60 °C
(-40 °F ... 140 °F) -
Communication
up to 2x 4 ... 20 mA HART
Profibus DP -
Certificates / Approvals
ATEX, CSA
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Options
Illuminated display, 6 line graphic display with country specific menu guidance, on-site diagnosis with envelope curve on display
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Components
Sensors FDU9x
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Measuring principle
Ultrasonic
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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
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Sensor features
pre-programed flow curves for typical open channel measurement
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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
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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
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Digital communication
HART, Profibus DP
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Hazardous area approvals
FMU allowed to operate FDU9x in Ex-zone
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Measuring principle
Ultrasonic
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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
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Options
Illuminated display, 6 line graphic display with country specific menu guidance, on-site diagnosis with envelope curve on display
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Components
Sensors FDU9x
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