Levelflex FMP50

Summary

Product identification

• Product: Levelflex FMP50
• Type: Guided-wave radar level sensor

Application

• Level measurement in liquids
• Rod or rope probe options
• Process connection: thread ¾" or adapter flange
• International explosion protection certificates; WHG (German Water Resources Act); EN10204-3.1
• Linearity protocol (3-point, 5-point)

Operating limits

• Process temperature: –20 to +80 °C (–4 to +176 °F)
• Process pressure: –1 to +6 bar (–14.5 to +87 psi)
• Maximum measuring range:
  • Rod probe: 4 m (13 ft)
  • Rope probe: 12 m (39 ft)
• Accuracy: ±2 mm (±0.08 in)

Feed water

• Relative permittivity (εr): Affects pulse reflection. High εr (e.g., water) causes strong reflection; low εr (e.g., hydrocarbons) causes weak reflection.
• Blocking distance (factory setting):
  • Up to 8 m probe length: 200 mm (8 in)
  • Over 8 m probe length: 0.025 × probe length
  • Can be reduced to 100 mm (4 in) for media with εr > 7.0.
  • No blocking distance in bypass/stilling wells.
• Tensioning weight area: For rope probes with εr < 7, measurement is not possible from 0 to 250 mm (0 to 9.84 in) from the probe end.

Product water

• Measured variable: Distance between reference point and product surface.
• Level calculation: Based on empty distance entered.
• Linearization: Optional, up to 32 points, for converting level to volume or mass. Preprogrammed tables for cylindrical vessels.

Electrical

• Output signal:
  • HART: FSK ±0.5 mA over current signal, 1200 Bit/s, galvanically isolated.
  • Bluetooth® wireless technology: Requires order code 610 and option NF. Operates via SmartBlue app. Range > 10 m (33 ft). Encrypted.
  • PROFIBUS PA: Manchester Bus Powered (MBP), 31.25 kBit/s, voltage mode, galvanically isolated.
  • FOUNDATION Fieldbus: Manchester Bus Powered (MBP), 31.25 kBit/s, voltage mode, galvanically isolated.
  • Switch output (for HART devices): Open collector, programmable switch-on/off point, 0 to 100 s delay. Electrical data: U = 16 to 35 VDC, I = 0 to 40 mA.
• Power supply: External power supply required. Specific terminal voltages and maximum loads depend on the configuration (2-wire, 4-wire) and approvals.
  • 2-wire, 4-20mA HART (passive): 11.5 to 35 VDC.
  • 4-wire, 4-20mA HART (active): 90 to 253 VAC or 10.4 to 48 VDC.
  • PROFIBUS PA, FOUNDATION Fieldbus: 9 to 32 V (non-hazardous), 9 to 30 V (hazardous).
• Power consumption: Varies by configuration, e.g., < 0.9 W for 2-wire HART, 6 VA for 4-wire 90-253 VAC HART.
• Current consumption:
  • HART: 3.6 to 22 mA nominal.
  • PROFIBUS PA: 14 mA nominal.
  • FOUNDATION Fieldbus: 15 mA nominal.

Mechanical / hydraulic

• Probe types: Rod or rope.
• Rod probe: Maximum length 4 m (13 ft), Material 316 L.
• Rope probe: Maximum length 12 m (40 ft), Material 316 L.
• Process connection: Thread ¾" or adapter flange.
• Terminals: Plug-in spring terminals (without overvoltage protection) or screw terminals (with overvoltage protection).
• Cable entries: M20x1.5, ½" NPT, G ½", M12 plug / 7/8" plug (non-Ex, Ex ic, Ex ia).
• Weight: Not specified in extract.
• Materials: Not specified in extract beyond probe materials.

Other features

• Integrated data memory (HistoROM).
• Multi-echo tracking for reliable measurement.
• SIL2 as per IEC 61508, SIL3 for homogeneous redundancy.
• Intuitive user interface with local language support.
• Bluetooth® wireless technology for commissioning, operation, and maintenance.
• Heartbeat Technology™.
• Overvoltage protection options available.

Disclaimer This summary is extracted from technical documentation and may omit figures, footnotes, or revisions. Contractual data must match the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror