Specs at a glance
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Accuracy
+/- 2 mm or +/- 0.2 % of set measuring range
-
Process temperature
-40 °C...+80 °C
(-40 °F...+176 °F) -
Process pressure / max. overpressure limit
0.7 bar...3 bar abs
(10 psi...44 psi) -
Max. measurement distance
Liquids: 5 m (16 ft),
Solids: 2 m (6.6 ft) -
Main wetted parts
PVDF
Field of application
The Prosonic FMU40 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: Thread
Temperature: -40 to +80°C (-40 to +176°F)
Pressure: +0.7 to +3bar (+10 to +44psi)
Maximum measuring distance: Liquids 5m (16ft), Solids 2m (16ft)
Blocking distance: Liquids and Solids 0.25m (0.8ft)
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
-
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 Limit
-
Characteristic / Application
Compact ultrasonic transmitter
-
Supply / Communication
2-wire HART
-
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...3 bar abs
(10 psi...44 psi) -
Main wetted parts
PVDF
-
Process connection
G / NPT 1 1/2"
-
Blocking distance
0.25 m (0.8 ft)
-
Communication
4...20 mA HART
-
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
-
Product headline
Compact ultrasonic measuring instrument
Cost effective solution for open channel -
Max. measurement error
Low accuracy
-
Measuring range
0,25...5m [0.8...16ft]
-
Max. process pressure
atm.
-
Medium temperature range
-40°C ... 80°C
(-40°F...176°F) -
Degree of protection
IP68
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Outputs
4...20mA(Hart),PA,FF
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Inputs
2-wire 16-36V DC,
4-wire 16-36V DC,
90-253V AC 50/60Hz -
Digital communication
PROFIBUS PA, FOUNDATION Fieldbus
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Hazardous area approvals
ATEX, FM, CSA
-
Measuring principle
Ultrasonic
-
Characteristic / Application
Compact ultrasonic transmitter
-
Supply / Communication
2-wire HART
-
Accuracy
+/- 2 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 ... 3 bar abs
(10 psi ... 44 psi) -
Main wetted parts
PVDF
-
Process connection
G / NPT 1 1/2"
-
Blocking distance
0.25 m (0.8 ft)
-
Max. measurement distance
Liquids: 5 m (16 ft),
Solids: 2 m (6.6 ft) -
Communication
4...20 mA HART
-
Certificates / Approvals
ATEX, FM, CSA, TIIS, INMETRO, NEPSI
-
Application limits
For higher resistance:
FMU42/FDU9x
Foam / high turbulence possible:
FMU41/FDU91
Fast filling and discharging rate:
FMU90 + FDU9x
Level limit detection:
FMU90 + FDU9x
-
Measuring principle
Ultrasonic Limit
-
Characteristic / Application
Compact ultrasonic transmitter
-
Supply / Communication
2-wire HART
-
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...3 bar abs
(10 psi...44 psi) -
Main wetted parts
PVDF
-
Process connection
G / NPT 1 1/2"
-
Blocking distance
0.25 m (0.8 ft)
-
Communication
4...20 mA HART
-
Certificates / Approvals
ATEX, FM, CSA, INMETRO, NEPSI
-
Application limits
Take notice of range diagram
-
Measuring principle
Ultrasonic
-
Characteristic / Application
Compact ultrasonic transmitter
-
Supply / Communication
2-wire HART
-
Accuracy
+/- 2 mm or +/- 0.2 % of set measuring range 1)
-
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 ... 3 bar abs
(10 psi ... 44 psi) -
Main wetted parts
PVDF
-
Process connection
G / NPT 1 1/2"
-
Blocking distance
0.25 m (0.8 ft)
-
Max. measurement distance
Liquids: 5 m (16 ft),
Solids: 2 m (6.6 ft) -
Communication
4...20 mA HART
-
Certificates / Approvals
ATEX, FM, CSA, TIIS, INMETRO, NEPSI
-
Application limits
Take notice of range diagram
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