Micropilot M FMR66B

Summary

Product identification

• Product: Micropilot FMR66B HART
• Type: Free-space radar level sensor for bulk solids.
• Document: TI01686F/00/EN/05.24-00

Application

• Continuous, non-contact level measurement of powdered to granular bulk solids.
• Process connections: thread or mounting bracket.

Operating limits

• Maximum measuring range: 50 m (164 ft)
• Process temperature range: –40 to +130 °C (–40 to +266 °F)
• Process pressure range: –1 to +16 bar (–14.5 to +232 psi)
• Accuracy: ±3 mm (±0.12 in)

Feed water

• Dielectric constant: εr ≥ 10 for external measurement through plastic cover or dielectric windows.

Product water

• Not applicable for this product type.

Electrical

• Output signal: HART, 4 to 20 mA passive (2-wire).
• Optional outputs: 4 to 20 mA passive (current output 2), Switching output (open collector).
• Supply voltage:
  • Non-hazardous, Ex d, Ex e: 10.5 to 35 VDC
  • Ex i: 10.5 to 30 VDC
• Nominal current: 4 to 20 mA
• Power consumption: 0.9 W max.
• HART load: Min. 250 Ω
• Wireless HART:
  • Minimum start-up voltage: 10.5 V
  • Start-up current: < 3.6 mA
  • Starting time: < 15 s
  • Minimum operating voltage: 10.5 V
  • Multidrop current: 4 mA
  • Time to establish connection: < 30 s

Mechanical / hydraulic

• Antenna options:
  • Encapsulated, PVDF, 40 mm (1.5 in) - Max measuring range: 30 m (98 ft)
  • Drip-off, PTFE, 50 mm (2 in) - Max measuring range: 50 m (164 ft)
• Materials: Options include PVDF, PTFE, 316L, coated aluminum, plastic.
• Dimensions: See official PDF for detailed dimensional drawings.
• Weight: See official PDF for specific weight information.
• Degree of protection:
  • Housing: IP66/68, NEMA Type 4X/6P
  • M12 plug: IP66/67 (housing closed, cable plugged in), IP20 (housing open or cable not plugged in)
  • HAN7D plug: IP65, NEMA Type 4X

Environment

• Ambient temperature range:
  • Without LCD: Standard –40 to +85 °C (–40 to +185 °F); Optionally –50 to +85 °C or –60 to +85 °C with restricted performance.
  • With LCD: –40 to +85 °C (–40 to +185 °F) with limitations in optical properties; usable without limitations up to –20 to +60 °C.
• Storage temperature:
  • Without LCD: –40 to +90 °C (–40 to +194 °F)
  • With LCD: –40 to +85 °C (–40 to +185 °F)
• Climate class: DIN EN 60068-2-38 (test Z/AD)
• Installation height: Generally up to 2,000 m (6,600 ft) above sea level.

Performance characteristics

• Reference operating conditions: Temperature +24 °C (±5 °C), Pressure 960 mbar abs. (±100 mbar), Humidity 60% (±15%).
• Measured value resolution:
  • Digital: 1 mm
  • Analog: 1 µA
• Maximum measured error:
  • Up to 1.5 m: max. ±20 mm (±0.79 in)

  • 1.5 m: ±3 mm (±0.12 in)

• Non-repeatability: ≤ 1 mm (0.04 in) (included in accuracy)
• Response time: < 1 s (when damping is switched off, pulse frequency ≥ 5/s)
• Influence of ambient temperature: Specific coefficients (TC) provided for digital and analog outputs.

Certifications and approvals

• CE mark
• RoHS
• RCM marking
• Ex approvals (specific details not listed here, refer to PDF)
• SIL2 as per IEC 61508, SIL3 for homogeneous redundancy
• Radio approval (EN 302729, EN 302372, FCC, Industry Canada)

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