Levelflex FMP55

Summary

Product identification

• Product Name: Levelflex FMP55
• Technology: Guided-wave radar
• Document ID: TI01003F/00/EN/28.24-00
• Serial Number: 71685194
• Publication Date: 2024-12-06

Application

Interface measurement in liquids.

Operating limits

• Process Temperature: –50 to +200 °C (–58 to +392 °F)
• Process Pressure: –1 to +40 bar (–14.5 to +580 psi)

Probe types and measuring ranges

• Rod probe: Maximum measuring range: 4 m (13 ft)
• Rope probe: Maximum measuring range: 10 m (33 ft)
• Coaxial probe: Maximum measuring range: 6 m (20 ft)

Performance characteristics

• Accuracy (Level Measurement, Digital Output, ≤ 10 m): ±2 mm (±0.08 in)
• Accuracy (Interface Measurement, Digital Output, > 500 mm): ±10 mm (±0.39 in)
• Non-repeatability: ≤ 1 mm (0.04 in)

Interface measurement conditions

• Relative permittivity (εr) of upper medium: Must be known and constant, may not exceed 10.
• Relative permittivity difference (upper vs. lower medium): Must be >10.
• Minimum thickness of upper medium: 60 mm (2.4 in).
• Conductivity of upper medium (for capacitive measurement): < 1 µS/cm
• Conductivity of lower medium (for capacitive measurement): > 100 µS/cm

Measuring principle

Functions according to the Time of Flight (ToF) method, also known as time domain reflectometry (TDR). For interface measurement, this is combined with capacitance measurement.

Output signals

• HART: FSK ±0.5 mA over current signal; 1200 Bit/s; Galvanic isolation: Yes.
• PROFIBUS PA: Manchester Bus Powered (MBP); 31.25 kBit/s, voltage mode; Galvanic isolation: Yes.
• FOUNDATION Fieldbus: Manchester Bus Powered (MBP); 31.25 kBit/s, voltage mode; Galvanic isolation: Yes.
• Switch output (HART devices): Open collector; Binary switching; Electrical connection data: U = 16 to 35 VDC, I = 0 to 40 mA.

Power supply

• 2-wire, 4-20mA HART, passive: Terminal voltage 17.5 to 35 V.
• 4-wire, 4-20mA HART, active (DC): 10.4 to 48 VDC.
• 4-wire, 4-20mA HART, active (AC): 90 to 253 VAC (50 to 60 Hz).
• PROFIBUS PA, FOUNDATION Fieldbus: 9 to 32 V.

Electrical Characteristics

• HART load: Min. 250 Ω.
• Nominal current (HART): 3.6 to 22 mA.
• Nominal current (PROFIBUS PA): 18 mA.
• Device basic current (FOUNDATION Fieldbus): 15 mA.

Mechanical construction

• Probe types: Rod, rope, or coaxial.
• Process connection: Flange.

Certifications and approvals

• CE mark
• RoHS
• RCM marking
• Ex-approval
• Dual seal ANSI/ISA 12.27.01
• Functional safety (SIL2 as per IEC 61508, SIL3 for homogeneous redundancy)
• AD2000
• NACE MR 0175 / ISO 15156
• NACE MR 0103
• ASME B31.1 and B31.3
• Pressure Equipment Directive
• Marine approval
• Radio approval
• CRN approval

Features

• Integrated data memory (HistoROM)
• Multi-echo tracking
• Intuitive user interface
• Bluetooth® wireless technology
• Heartbeat Technology™

Disclaimer: 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