Cost effective device for sophisticated level measurement in liquids and bulk solids for up to 20m.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 20m (66ft), Solids 10m (33ft). Blocking distance: Liquids and Solids 0.5m (1.9ft). 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
Measuring principle
Ultrasonic
Characteristic / Application
Compact ultrasonic transmitter
Supply / Communication
2-wire HART
Accuracy
+/- 4mm 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
DN100, ASME 4″, JIS 10K 100
DN150, ASME 6″, JIS 10K 150
DN200, ASME 8″, JIS 10K 200
Mounting bracket
Blocking distance
0.5 m (1.9 ft)
Max. measurement distance
Liquids: 20 m (66 ft),
Solids: 10 m (33 ft)
Communication
4…20 mA HART
Certificates / Approvals
ATEX, FM, CSA, IEC, INMETRO, NEPSI
Application limits
Fast filling and discharging rate:
FMU90 + FDU9x
Level limit detection:
FMU90 + FDU9x
Features
- Non-contact ultrasonic measurement using time-of-flight principle: the sensor emits pulses, receives the reflection from the surface.
- Integrated temperature sensor for automatic correction of sound velocity changes with temperature.
- Menu-guided local operation via a 4-line plain text display, selectable in 7 languages.
- Envelope curve display on the on-site display for simple diagnostics of echoes.
- Linearisation capability (up to 32 points) so the measured value can be converted into user units (height, volume, flow) as needed.
- Compact transmitter available in 2-wire or 4-wire versions with communication options like 4-20 mA + HART, or bus options (depending on version).
