Prosonic FMU44

Summary

Product identification

• Product Name: Prosonic M FMU44
• Technology: Ultrasonic measuring technology
• Document ID: TI01460F/00/EN/01.21-00
• Revision Date: 2021-12-29

Application

Compact transmitter for non-contact level and flow measurement.

• Output: Two-wire version with HART protocol
• Process Connection: Thread
• Certificates: International explosion protection certificates available.

Operating limits

• Process Temperature Range: –40 to +80 °C (–40 to +176 °F)
• Process Pressure Range: 0.7 to 2.5 bar abs. (10.15 to 36.25 psi)
• Ambient Temperature Range: –40 to +80 °C (–40 to +176 °F)
• Storage Temperature: –40 to +80 °C (–40 to +176 °F)
• Maximum Measuring Range:
  • Liquids: 20 m (66 ft)
  • Bulk solids: 10 m (33 ft)
• Blocking Distance: 0.5 m (1.6 ft) for liquids and bulk solids.

Feed water / Medium

• Influence of Gas Phase: Accuracy is very good for media with vapor pressure < 50 mbar at 20 °C (e.g., water, aqueous solutions, oils). Accuracy may be impacted by high vapor pressures or outgassing (e.g., ethanol, acetone).

Product water / Measured Variable

• Measured Variable: Distance (D) between sensor membrane and product surface.
• Calculated Variables: Level (L), Volume (V), Flow (Q) (with linearization).

Performance characteristics

• Reference Operating Conditions: Temperature: +20 °C, Pressure: 1013 mbar abs., Humidity: 50%.
• Measured Value Resolution: 2 mm (0.08 in)
• Maximum Measured Error: ±0.2 % of the maximum sensor span (under reference operating conditions).
• Measuring Error: Better than ±4 mm (±0.16 in) or 0.2 % of the measuring distance (whichever is larger).
• Response Time (minimum): ≥ 3 s (Two-wire version).
• Pulse Frequency (maximum): ≤ 0.4 Hz (Two-wire version).

Electrical

• Output Signal: 4 to 20 mA with HART protocol.
• Load (Min. for HART communication): 250 Ω
• Power Supply (Two-wire version):
  • Standard: 14 to 36 V (at 4 mA), 8 to 36 V (at 20 mA)
  • Ex ia: 14 to 30 V (at 4 mA), 8 to 30 V (at 20 mA)
  • Ex d: 14 to 30 V (at 4 mA), 11 to 30 V (at 20 mA)
• Power Consumption (Two-wire version): 51 to 800 mW
• Current Consumption (Two-wire version): 3.6 to 22 mA

Mechanical / Hydraulic

• Sensor Material: PVDF
• Seals: EPDM or FKM
• Housing: AlSi10Mg powder-coated (T12 and F12)
• Process Connections: Universal flange options (DN100, DN150, DN200), ANSI flange options (4", 6", 8"), JIS flange options, Mounting bracket.
• Dimensions: See diagrams for F12 housing, T12 housing, sensor, mounting bracket, and flange dimensions.
• Weight: Approx. 4 kg (8.82 lb)

Operability

• Languages: 7 languages supported (German, English, Spanish, French, Japanese, Italian, Dutch).
• Local Operation: Via integrated LCD display and 3 keys.
• Remote Operation: Via personal computer with FieldCare or Field Xpert software, Commubox FXA195/FXA291, or VIATOR Bluetooth modem.

Environment

• Degree of Protection: IP68, NEMA 6P (housing closed), IP20, NEMA 1 (display).
• Vibration Resistance: DIN EN 60068-2-64 / IEC 68-2-64.
• Electromagnetic Compatibility: In accordance with EN 61326 series and NAMUR Recommendation EMC (NE 21).

Disclaimer

This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror