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  • FMU41 Ultrasonic Level measurement

FMU41 Ultrasonic Level measurement

  • Product Item : FMU41-ARB2A2
  • Category: Level
  • Measuring Principle:Ultrasonic
  • Characteristic / Application:Compact ultrasonic transmitter
  • Supply / Communication:2/4-wire (HART), PROFIBUS PA, FOUNDATION Fieldbus
  • Max. measurement distance:Liquids: 8 m (26 ft), Solids: 3.5 m (11 ft)
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Ultrasonic measurement Time-of-Flight Prosonic FMU41

Cost effective device for sophisticated level measurement in liquids and bulk solids for up to 8m


The Prosonic FMU41 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.

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

Field of application

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 8m (26ft), Solids 3.5m (11ft)

  • Blocking distance: Liquids and Solids 0.35m (1.15ft)

  • International explosion protection certificates

Features and specifications

Continuous / Liquids  
Measuring Principle Ultrasonic
Characteristic / Application Compact ultrasonic transmitter
Supply / Communication 2/4-wire (HART), PROFIBUS PA, FOUNDATION Fieldbus
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 absolute / 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 8 m (26 ft)
Communication 4 ... 20 mA HART
PROFIBUS PA
FOUNDATION Fieldbus
Certificates / Approvals ATEX, FM, CSA, NEPSI, TIIS, INMETRO

Continuous / Solids  
Measuring Principle Ultrasonic
Characteristic / Application Compact ultrasonic transmitter
Supply / Communication 2/4-wire (HART), PROFIBUS PA, FOUNDATION Fieldbus
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 absolute / 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 3.5 m (11 ft)
Communication 4 ... 20 mA HART
PROFIBUS PA
FOUNDATION Fieldbus
Certificates / Approvals ATEX, FM, CSA C/US, TIIS, NEPSI, INMETRO
Liquids  
Measuring Principle Ultrasonic
Product headline Compact ultrasonic measuring instrument
Cost effective solution for open channel
Max. measured 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
Outputs 4...20mA(Hart),PA,FF
Inputs 2-wire 16-36V DC,
4-wire 16-36V DC,
90-253V AC 50/60Hz

Digital communication PROFIBUS PA
FOUNDATION Fieldbus

Hazardous area approvals ATEX
FM
CSA