1. Overview

• Product: Levelflex FMP51
• Type: Guided‑wave radar level transmitter (Time-of-Flight)
• Manufacturer: Endress+Hauser
• Application: Continuous level measurement for liquids, slurries, pastes, and interface measurement.
• Probe Types: Rod, rope (cable), or coaxial probes.

2. Key Specifications

Here are the main specs for FMP51:

3. Key Features & Advantages

• Reliable Measurement in Challenging Conditions
  Works well under changing process conditions — even with surface turbulence, foam, or internal tank baffles.
• HistoROM Data Management
  Stores device parameters, commissioning and calibration history for quick maintenance and diagnostics.
• Multi‑Echo Tracking Evaluation
  Uses advanced echo signal evaluation (multi-echo) to improve measurement reliability, especially in complex environments.
• Heartbeat Technology
  Enables safe and cost‑effective proof testing (functional check) throughout the instrument’s life cycle.
• Easy Integration and Operation
  Intuitive, menu-guided operation. Can integrate with control systems or asset management systems.
• SIL / Safety
  Designed and certified up to SIL 3 per IEC 61508.

4. Applications / Use Cases

• Industrial Process Level Measurement: For liquids, slurries, pastes in chemical, petrochemical, or processing plants.
• Interface Measurement: Can detect liquid-liquid interface levels (e.g., oil/water).
• Harsh Conditions: High-temperature or high-pressure tanks; vessels with foam or vapors.
• Safety Critical Systems: Applications needing overfill protection or SIL-rated instrumentation.

5. Communication & Options

• Outputs / Communication Protocols:
• 2-wire: 4–20 mA with HART
• Optionally: FOUNDATION Fieldbus, PROFIBUS PA
• Remote / Wireless Commissioning:
• Bluetooth® option + SmartBlue app for configuration and diagnostics.
• Process Connection Types: Threaded or flanged.

6. Pros & Cons

Pros:

• Very reliable even with difficult surface conditions (foam, turbulence)
• Excellent temperature and pressure tolerance
• Long measuring range (especially with rope probe)
• Safety features (SIL, overfill) make it suitable for critical applications
• Good diagnostics & maintenance support via HistoROM and Heartbeat

Cons / Considerations:

• Rope version requires careful handling / installation (long probes)
• Initial cost likely higher than simpler level sensors
• Requires correct setup for dielectric constant (DK) to ensure accuracy for longer rope version

7. Example Product

One variant: Endress+Hauser Levelflex FMP51

8. Summary

The Levelflex FMP51 is a high-performance guided-wave radar (Time-of-Flight) level transmitter, designed for demanding industrial applications. With its flexibility (rod, rope, coax), strong process tolerances, advanced echo tracking, and safety certification, it's a very reliable choice for continuous level measurement under harsh or critical conditions.