FMU41 Ultrasonic measurement Time-of-Flight Prosonic

Field of application

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.

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, TIIS, 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