Endress+Hauser Levelflex FMP55 Interface Guided Radar Transmitter

Overview of the Endress+Hauser Levelflex FMP55 Interface and Level Radar

The Endress+Hauser Levelflex FMP55 is a guided wave radar built for level and interface measurement in liquids. Its distinguishing feature is a PFA-coated probe combined with a capacitance measurement, which allows it to locate the boundary between two liquids such as oil on water even when an emulsion layer forms between them. The transmitter is offered with a rod probe up to 4 m, a rope probe up to 10 m or a coaxial probe up to 6 m, covers a process range of –50 to +200 °C and –1 to +40 bar, and achieves ±2 mm in level measurement.

As the official trusted supplier and regional supplier for Endress+Hauser, Seven Star LLC proudly supplies the Endress+Hauser Levelflex FMP55 to customers across the Sultanate of Oman and the wider GCC. Seven Star LLC can supply the Technical Information TI01003F with each offer so that process engineers in Muscat, Sohar and Salalah can check probe coating, flange and interface conditions before ordering.

Interface Measuring Principle of the Endress+Hauser Levelflex FMP55

The Endress+Hauser Levelflex FMP55 is a downward-looking time-of-flight (ToF) system, also called time domain reflectometry. High-frequency pulses run down the probe and are reflected at the product surface, and the distance follows from D = c · t/2. In interface measurement, a part of the pulse enters the upper medium of low permittivity and is reflected again at the boundary to a lower medium of higher permittivity, so the delayed time-of-flight through the upper layer yields the interface position as well as the total level.

In addition, the FMP55 measures the capacitance of the probe. This is what keeps interface readings available when emulsions or rag layers weaken the second echo. The manufacturer lists conditions for this mode: the relative permittivity of the upper medium must be known, constant and not above 10, the permittivity difference between the media must exceed 10, the upper layer must be at least 60 mm thick, and the capacitive evaluation expects an upper-medium conductivity below 1 µS/cm and a lower-medium conductivity above 100 µS/cm.

Engineering Design of the Endress+Hauser Levelflex FMP55

The probe options match the vessel. The 16 mm PFA-coated rod probe over 316L reaches 4 m with a flexural strength of 30 Nm, the 4 mm PFA-coated rope probe over 316 reaches 10 m with a tensile loading capacity of 2 kN, and the 316L coaxial probe of 42.4 mm diameter with multiple holes reaches 6 m with 300 Nm flexural strength. Coaxial probes are unaffected by nozzles and internal fixtures and give maximum EMC protection in plastic tanks. A remote probe version with a separate sensor is available for probe lengths up to 7 m.

The process connection is a flange. The electronics sit in a plastic GT19, aluminum GT20 or stainless steel GT18 housing, weighing about 1.2 kg, 1.9 kg and 4.5 kg, with the probe adding about 1.2 kg per meter plus the flange. A two-wire loop needs 17.5 to 35 V in non-hazardous areas, and outputs are 4–20 mA HART, PROFIBUS PA and FOUNDATION Fieldbus, with optional Bluetooth for the SmartBlue app. A 32-point linearization converts level to volume or mass, and HistoROM stores configuration and measured values.

Key Features of the Endress+Hauser Levelflex FMP55

The Endress+Hauser Levelflex FMP55 brings the following documented capabilities to level and interface duties:

• Interface measurement with capacitance evaluation that tolerates emulsion layers between two liquids.
• Level accuracy of ±2 mm up to 10 m, and interface accuracy of ±10 mm above 500 mm measuring distance.
• Step response below 0.8 s for level and below 2.2 s for interface measurement with probes under 10 m.
• Process temperature from –50 to +200 °C with fully coated probes and pressure from –1 to +40 bar.
• Rod, rope and coaxial probes with a maximum of 4 m, 10 m and 6 m respectively.
• SIL 2 according to IEC 61508 and SIL 3 with homogeneous redundancy, with easy proof testing.
• International explosion protection certificates, marine approval and EN 10204-3.1 material certificates.
• Multi-Echo Tracking, mapping of interference echoes and Heartbeat Technology for diagnostics.

Industrial Applications of the Endress+Hauser Levelflex FMP55

The Endress+Hauser Levelflex FMP55 suits separators, decanters and settling tanks where oil, condensate or solvent floats on water, and storage vessels holding corrosive liquids that attack bare stainless steel probes, since the PFA coating protects the probe. In Oman this fits oil-water separation at upstream and midstream facilities, slop tanks and effluent treatment at refineries, and chemical storage in the Sohar and Salalah industrial zones where acids, caustic or aggressive solvents are handled.

In Oman and the GCC, Seven Star LLC supplies the Levelflex family to customers in Oman and the GCC. For uncoated duties engineers can compare the Endress+Hauser Levelflex FMP51 and the Levelflex FMP54 guided radar, and for basic tanks the

Endress+Hauser Levelflex FMP50

Technical Specifications of the Endress+Hauser Levelflex FMP55

The table lists the main data of the Endress+Hauser Levelflex FMP55 as published in Endress+Hauser Technical Information TI01003F.

Request a Quote for Endress+Hauser Levelflex FMP55

To specify the Endress+Hauser Levelflex FMP55, send Seven Star LLC the two media, their permittivity and conductivity, the vessel height, the flange and the pressure so that we can prepare a formal RFQ. The Technical Information TI01003F can be downloaded from this page, and our instrumentation division will confirm probe and coating options and lead time at quotation. In Oman and the GCC, we supply the Endress+Hauser Levelflex FMP55 with manufacturer documentation and local support.