Specs at a glance
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Accuracy
+/- 4 mm or +/- 0,2 % of set measuring range
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Process temperature
-40 °C ... 80 °C
(-40 °F ... 176 °F) -
Process pressure / max. overpressure limit
0.7 bar ... 2.5 bar abs
(10 psi ... 36 psi) -
Max. measurement distance
Liquids: 10 m (33 ft),
Solids: 5 m (16 ft) -
Main wetted parts
PVDF
Field of application
The Prosonic FMU42 sensor is suited for non-contact level measurement in fluids, pastes, coarse bulk material and flow measurement in open channels or at weirs. The two-wire or four-wire compact transmitter can be used in applications with storage tanks, agitators, on stockpiles and conveyor belts. The envelope curve can be shown on the on-site display for simple diagnosis. Linearization function (up to 32 points) for conversion of the measured value into any unit of length, volume or flow rate.
Two-wire or four wire instrument for continuous non-contact level and flow measurement.
Process connection: Flange
Temperature: -40 to +80°C (-40 to +176°F)
Pressure: +0.7 to +2.5bar (+10 to +36psi)
Maximum measuring distance: Liquids 10m (33ft), Solids 5m (16ft)
Blocking distance: Liquids and Solids 0.4m (1.3ft)
International explosion protection certificates
Benefits
Reliable non-contact measurement
Quick and simple commissioning via menu-guided on-site operation with four-line plain text display, 7 languages selectable
Envelope curves on the on-site display for simple diagnosis
Hermetically sealed and potted sensor
Chemically resistant sensor out of PVDF
Calibration without filling or discharging
Integrated temperature sensor for automatic correction of the temperature dependent sound velocity
Videos
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Time-of-Flight measuring principle
Extended selection
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High-end products
- Highly functional and convenient
Technical excellence
Simplicity

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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 |
---|---|---|
Fundamental selection Meet your basic measurement needs |
Technical excellence
|
Simplicity
|
Lean selection Handle your core processes easily |
Technical excellence
|
Simplicity
|
Extended selection Optimize your processes with innovative technologies |
Technical excellence
|
Simplicity
|
Xpert selection Master your most challenging applications |
Technical excellence
|
Simplicity
Variable |
Predecessor
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Measuring principle
Ultrasonic
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Characteristic / Application
Compact ultrasonic transmitter
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Supply / Communication
2-wire HART
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Accuracy
+/- 4 mm or +/- 0,2 % of set measuring range
-
Ambient temperature
-40 °C ... 80 °C
(-40 °F ... 176 °F) -
Process temperature
-40 °C ... 80 °C
(-40 °F ... 176 °F) -
Process pressure / max. overpressure limit
0.7 bar ... 2.5 bar abs
(10 psi ... 36 psi) -
Main wetted parts
PVDF
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Process connection
Flange
DN80, ASME 3", JIS 10K 80
DN100,ASME 4", JIS 10K 100
Mounting bracket -
Blocking distance
0.4 m (1.3 ft)
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Max. measurement distance
Liquids: 10 m (33 ft),
Solids: 5 m (16 ft) -
Communication
4...20 mA HART
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Certificates / Approvals
ATEX, FM, CSA, INMETRO, NEPSI
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Application limits
Take notice of range diagram
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Measuring principle
Ultrasonic
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Characteristic / Application
Compact ultrasonic transmitter
-
Supply / Communication
2-wire HART
-
Accuracy
+/- 4 mm or +/- 0,2 % of set measuring range
-
Ambient temperature
-40 °C ... 80 °C
(-40 °F ... 176 °F) -
Process temperature
-40 °C ... 80 °C
(-40 °F ... 176 °F) -
Process pressure / max. overpressure limit
0.7 bar ... 2.5 bar abs
(10 psi ... 36 psi) -
Main wetted parts
PVDF
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Process connection
Flange
DN80, ASME 3", JIS 10K 80
DN100,ASME 4", JIS 10K 100
Mounting bracket -
Blocking distance
0.4 m (1.3 ft)
-
Max. measurement distance
Liquids: 10 m (33 ft),
Solids: 5 m (16 ft) -
Communication
4...20 mA HART
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Certificates / Approvals
ATEX, FM, CSA, INMETRO, NEPSI
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Application limits
Foam / high turbulence possible:
FMU44/FDU92
Fast filling and discharging
rate:
FMU90 + FDU9x
Level limit detection
FMU90 + FDU9x
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