E+H Levelflex FMP55 Guided Wave Radar Level Transmitter

Introduction to Endress+Hauser Levelflex FMP55

The Endress+Hauser Levelflex FMP55 represents the pinnacle of industrial process measurement instrumentation, providing dual-parameter capability for simultaneous total level and interface tracking. Utilizing advanced Time Domain Reflectometry (TDR) alongside a capacitive measuring technique, this guided wave radar level meter is uniquely optimized to monitor liquid levels and separation layers (such as oil and water) with supreme accuracy. Whether deployed in chemical processing, oil and gas, or water and wastewater treatment plants, the FMP55 guarantees high availability and robust performance.

Operating Principle & Dual Measurement Technology

At the core of the FMP55 is a downward-looking measuring system that injects high-frequency pulses along a probe (rod, rope, or coax). These pulses reflect off the product surface based on the medium’s relative permittivity (dielectric constant, DC). For complex interface applications—such as vessels with emulsion layers or fluctuating upper dielectric values—the integrated capacitance measurement acts as a reliable backup, ensuring continuous data output where traditional radar systems might fail. The device’s self-learning PulseMaster and multi-echo tracking software expertly filter out internal tank obstacles and false echoes.

Key Features & Industrial Benefits

• SensorFusion Technology: Combines guided wave radar and capacitance measurement for true, direct interface detection and robust handling of buildup or emulsions.

• Multi-Echo Tracking: Advanced signal evaluation algorithms eliminate interference echoes caused by internal fixtures, nozzles, or stirrer blades.

• HistoROM Data Management: Integrated non-volatile data memory allows for fast electronics module replacement without the need for a complete recalibration, minimizing plant downtime.

• Intuitive Local Operation & Bluetooth: Features a user-friendly local display with touch control (SD03) or push-buttons (SD02), alongside optional Bluetooth wireless technology for secure commissioning and maintenance via the SmartBlue app.

• High Safety Standards: Designed in accordance with IEC 61508, offering SIL2 compliance (and SIL3 for homogeneous redundancy) for safety-critical applications.

Versatile Probe Design & Process Connections

To match diverse industrial tank configurations, the FMP55 supports multiple probe geometries mounted via secure flanged process connections:

• Coaxial Probes: Ideal for clean liquids, narrow spaces, and non-metallic vessels, providing maximum immunity to external disturbances.

• Rod Probes: Best suited for bypass tubes, stilling wells, and shorter measuring ranges.

• Rope Probes: Designed for extended measuring ranges up to 10 meters inside stilling wells or bypass pipes.

Applications

• Oil and Gas Industry: Crude oil separation tanks, desalter units, and liquid hydrocarbon storage monitoring.

• Chemical and Petrochemical Plants: Acid, solvent, and corrosive liquid level monitoring, as well as chemical reactor interface detection.

• Refining and Fuel Storage: Oil-water interface measurement in separation basins and underground or aboveground storage tanks.

• Water and Wastewater Treatment: Clarifier tanks, sludge blanket detection, and chemical dosing storage vessels.

• Power Generation & Pulp/Paper: Boiler feedwater tanks, condensate monitoring, and general process fluid measurement.

Technical Parameters

• Device Type: Guided Wave Radar (GWR) Level and Interface Transmitter

• Measured Variables: Level, interface, distance, thickness of upper layer, and volume/mass via linearization

• Max. Measuring Range:

  • Rod probe: Up to 4 m (13 ft)

  • Rope probe: Up to 10 m (33 ft)

  • Coaxial probe: Up to 6 m (20 ft)

• Process Connection: Flange connections (EN, ASME, JIS standards)

• Process Temperature Range: -50 °C to +200 °C (-58 °F to +392 °F) (fully coated version)

• Process Pressure Range: -1 to 40 bar (-14.5 to +580 psi)

• Accuracy: ±2 mm (±0.08 in) for level measurement

• Dielectric Constant (εr): Upper medium ≤ 10; difference between upper and lower medium > 10

• Communication Protocols: FOUNDATION Fieldbus, HART, PROFIBUS PA, Bluetooth (optional)

• Housing Materials: Plastic (PBT), aluminum (powder-coated), or corrosion-resistant stainless steel (316L / CF3M)

• Degree of Protection: IP66/68 (NEMA 4X/6P)

 FAQ

• Q1: Can the FMP55 measure both total level and interface level simultaneously?

  • A: Yes. The FMP55 is specifically engineered for simultaneous level and interface measurement in liquid-liquid applications, utilizing both radar time-of-flight and capacitance technologies.

• Q2: Is a coaxial probe required for non-metallic vessels?

  • A: Yes. When installing the device in non-metallic vessels or large-diameter nozzles, using a coaxial probe is strongly recommended to eliminate environmental reflections and ensure signal integrity.

• Q3: How does the HistoROM feature assist in maintenance?

  • A: The integrated HistoROM data memory automatically saves device configurations and event logs. If an electronics module needs replacement, the settings can be quickly restored without requiring a full re-commissioning.

• Q4: Is the device suitable for explosive hazardous areas?

  • A: Yes. The FMP55 offers international explosion protection approvals (such as ATEX, IECEx, CSA, FM, NEPSI), with specific safety instructions (XA) supplied depending on the chosen configuration.

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