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