Cost effective device for sophisticated level measurement in liquids and bulk solids for up to 8m. 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.
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
+/- 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 / max. overpressure limit
0.7 bar … 3 bar abs
(10 psi … 44 psi)
Main wetted parts
PVDF
Process connection
G / NPT 2″
Blocking distance
0.35 m (1.15 ft)
Max. measurement distance
Liquids: 8 m (26 ft),
Solids: 3.5 m (11 ft)
Communication
4…20 mA HART
Certificates / Approvals
ATEX, FM, CSA, IEC, INMETRO, NEPSI
Application limits
For higher resistance:
FMU42/FDU9x
Foam / high turbulence possible:
FMU42/FDU91
Fast filling and discharging rate:
FMU90 + FDU9x
Level limit detection:
FMU90 + FDU9x
Features
- Non-contact ultrasonic level/flow measurement using time-of-flight-principle.
- Compact 2-wire or 4-wire version for liquids, pastes, coarse bulk materials and open-channel flow measurement.
- Built-in temperature sensor for automatic correction of sound velocity for changing temperatures.
- Menu-guided local operation via a four-line plain text display, selectable in seven languages.
- Display “envelope curve” of the echo on-site for diagnostics of the echo signal.
- Linearisation function up to 32 points—so the measured value can be converted into user units (length, volume, flow).
- Housing materials and sensor wetted parts: PVDF sensor for chemical resistance; hermetically sealed/potted sensor.
- Suitable for hazardous areas (explosion protection) in appropriate versions.
