Cost effective device for sophisticated level measurement in liquids and bulk solids for up to 10m. 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
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, IEC, INMETRO, NEPSI
Application limits
Foam / high turbulence possible:
FMU44/FDU92
Fast filling and discharging rate
FMU90 + FDU9x
Level limit detection
FMU90 + FDU9x
Features
- Non-contact ultrasonic measurement (time-of-flight) of distance from sensor to product surface.
- Integrated temperature sensor to compensate for variations in speed of sound (sound velocity) with temperature changes.
- Menu-guided on-site operation with a 4-line plain-text display (seven selectable languages) for easy commissioning.
- On-site diagnostic capability: display of the echo “envelope curve” to help check/diagnose signal quality.
- Robust sensor construction with hermetically sealed and potted sensor; chemical-resistant sensor material (PVDF) for wetted parts.
- Linearization capability (up to 32 points) so that measured value can be converted into user units (length, volume, flow).
- Flexible output and communication options: two-wire or four-wire versions; supports 4-20 mA + HART, and optionally fieldbus protocols (in certain variants) for integration.
