Ultrasonic measurement
Time-of-Flight
Prosonic FMU42

Cost effective device for sophisticated level measurement in liquids and bulk solids for up to 10m

FMU42

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Specs at a glance

Accuracy

+/- 4 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 ... 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

See all specifications

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

Time-of-Flight measuring principle

Extended selection

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Simple products
Easy to select, install and operate

Technical excellence

Simplicity

What is FLEX?

Standard products
Reliable, robust and low-maintenance

Technical excellence

Simplicity

What is FLEX?

High-end products
Highly functional and convenient

Technical excellence

Simplicity

What is FLEX?

Specialized products
Designed for demanding applications

Technical excellence

Simplicity

Variable

What is FLEX?

FLEX selections	Technical excellence	Simplicity
F L E X Fundamental selection Meet your basic measurement needs	Technical excellence	Simplicity
F L E X Lean selection Handle your core processes easily	Technical excellence	Simplicity
F L E X Extended selection Optimize your processes with innovative technologies	Technical excellence	Simplicity
F L E X Xpert selection Master your most challenging applications	Technical excellence	Simplicity Variable

Learn more about the FLEX selections

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Predecessor

Success stories

Level measurement of silos on construction sites

Discover how Profibaustoffe Austria GmbH automated the monitoring of bulk material inside silos to deliver refills on a "just- in-time" basis.
Read the full story
Time saved, safety increased

Employees of Returkraft regularly have to fulfill and document all requirements of the SIL measuring points in the plant.
Read the full story
Fit for purpose instrumentation for CNG compressors

The Egyptian government is working to replace liquid fuels with natural gas. To achieve this they targeted increasing the number of CNG stations in their country from 306 to 1000 by the end of 2021.
Read the full story
Extend SIL proof test intervals with new Liquiphant FTL51

Discover how our customer CABB was able to extend SIL proof test intervals with the new Liquiphant FTL51
Read the full story
Optimized logistics concept for tank systems

We implemented a highly effective logistics concept at chemicals distributors Brenntag Schweizerhall AG's Basel site.
Read the full story

Measuring principle

Ultrasonic
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
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
Certificates / Approvals

ATEX, FM, CSA, INMETRO, NEPSI
Application limits

Foam / high turbulence possible:
FMU44/FDU92
Fast filling and discharging
rate:
FMU90 + FDU9x
Level limit detection
FMU90 + FDU9x

Measuring principle

Ultrasonic
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
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
Certificates / Approvals

ATEX, FM, CSA, INMETRO, NEPSI
Application limits

Take notice of range diagram

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Version:	25/03/2024
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Version:	09/06/2022
File size:	1.1 MB
File name:	TI01458FEN_0121-00.pdf

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Ultrasonic measurementTime-of-FlightProsonic FMU42

Cost effective device for sophisticated level measurement in liquids and bulk solids for up to 10m

Specs at a glance

Accuracy

Process temperature

Process pressure / max. overpressure limit

Max. measurement distance

Main wetted parts

Field of application

Benefits

Videos

Extended selection

Predecessor

Success stories

Level measurement of silos on construction sites

Time saved, safety increased

Fit for purpose instrumentation for CNG compressors

Extend SIL proof test intervals with new Liquiphant FTL51

Optimized logistics concept for tank systems

Measuring principle

Characteristic / Application

Supply / Communication

Accuracy

Ambient temperature

Process temperature

Process pressure / max. overpressure limit

Main wetted parts

Process connection

Blocking distance

Max. measurement distance

Communication

Certificates / Approvals

Application limits

Measuring principle

Characteristic / Application

Supply / Communication

Accuracy

Ambient temperature

Process temperature

Process pressure / max. overpressure limit

Main wetted parts

Process connection

Blocking distance

Max. measurement distance

Communication

Certificates / Approvals

Application limits

Back

Prosonic M FMU42

TI Weld-in adapter, process adapter and flanges

Prosonic M FMU42

Prosonic M FMU40/41/42/43/44 Technical Information

Prosonic M FMU42 HART

Prosonic M FMU40/41/42/43/44

Prosonic M FMU40/41/42/43/44

Prosonic M FMU40/41/42/43/44

Prosonic M FMU40/41/42/43/44

FMU4x - Exchange of housing T12

FMR2x, FMP4x, FMU4x - Exchange of terminal module

Prosonic M FMU40/41/42/43/44 4-20 mA HART Brief Operating Instructions

Micropilot M, Leveflex M, Prosonic M - Modification of F12 housing (2 wire) for connection of FHX40

Levelflex M, Prosonic M - modification of housing F12 (4 wire) for Connection of FHX40

Exchange of sensor on Prosonic M FMU42/FMU44

Prosonic M FMU40/41/42/43/44 PROFIBUS-PA Brief Operating Instructions

Prosonic M FMU40/41/42/43/44 FOUNDATION Fieldbus Brief Operating Instructions

Prosonic M FMU42 HART

Display VU331

Screw set for Micropilot II/M, Levelflex M, Prosonic M

FMU4x - Exchange of housing F12

Back

Plug 3-pole, M12, gasket

Set of screws housing F12/T12/F23

Sealing kit FMU4x

Cover F12/T12 Alu, coated, gasket

Cover T3/T12 Alu, coated, gasket

Cover F12/T12 Alu, window, gasket

Cover terminal compartment F12/F23

Cover terminal compartment F12/F23,FHX40

Hood housing T12

O-ring 113.9x3.63 EPDM, 5 pieces

Ultrasonic measurement
Time-of-Flight
Prosonic FMU42