Target Application & Quick Solution: The Endress+Hauser Levelflex FMP51 is a high-precision Guided Wave Radar (GWR) level transmitter engineered specifically for plant engineers in chemical, petrochemical, and oil & gas sectors needing continuous liquid level and liquid-liquid interface measurement under extreme thermal and pressure stress. Operating from -50°C to +200°C (-58°F to +392°F) and Vacuum to 40 bar (580 psi), the FMP51 eliminates measurement signal loss caused by heavy surface foam, high-density boiling steam, aggressive slurries/mud, and dielectric constant (DK) variations, maintaining a certified ±2 mm (±0.08 in) reference accuracy.
⚡ Engineering Procurement Notice: Pre-calibrated factory stock units available with EN 10204-3.1 material test certificates, NACE MR0175 compliance, and SIL3 (IEC 61508) verification. Express 24-hour drawing submittal and direct corporate transfers accepted in USD, EUR, and RMB (Yuan). Request Official RFQ & Technical Datasheet →
In turbulent mixing tanks or tall distillation columns, internal obstructions like agitator blades and structural baffles generate high-amplitude static noise. The FMP51 integrates Multi-Echo Tracking firmware algorithms that automatically identify, track, and filter out false echo reflections, locking exclusively onto the true process medium boundary to prevent unexpected loop trips and batch waste.
To pass ISO 9001 and SIL functional safety audits without shutting down critical process lines, integrated Heartbeat Technology performs continuous internal voltage, microwave pulse, and clock oscillator checks in under 90 seconds. Operators can download audit-ready, cryptographically stamped verification reports via 4-20 mA HART or Bluetooth SmartBlue App without breaking process containment.
The FMP51 utilizes Time-Domain Reflectometry (TDR) to process dual-reflection energy pulses in a single loop. It calculates both the total liquid volume and the lower oil-water or solvent-aqueous interface boundary down to media dielectric constants of DK > 1.4 (coaxial), eliminating manual tank dipping and preventing chemical carryover in separation vessels or thick slurry tanks.
Unplanned instrument downtime is minimized through the integrated HistoROM data memory module. HistoROM automatically stores configuration parameters, event logs, and signal envelope curves. Upon sensor module replacement, all process configuration settings are instantly restored without requiring manual recalibration or field reprogramming.
| Process Challenge / Process Risk | E+H Levelflex FMP51 (GWR) | Free-Space Non-Contact Radar (80 GHz) | Ultrasonic Level Transmitter |
|---|---|---|---|
| Boiling Foam & Surface Turbulence | Immune (Pulses guided directly along rod/cable) | Moderate Signal Attenuation | Severe Signal Loss / Complete Failure |
| Slurries, Mud & Viscous Media | High Stability (Immune to probe buildup) | Signal Loss on Antenna Coating | Not Recommended |
| High Pressures & Vacuum Cycles | Vacuum to 40 bar (580 psi) | Vacuum to 16-160 bar (Model dependent) | Atmospheric Only (< 3 bar) |
| Heavy Steam & Vapor Layers | Zero Drift (Direct wave containment) | Minor Velocity Shifts | High Measurement Drift |
| Interface Measurement (e.g., Oil/Water) | Supported Dual-Echo Tracking | Not Recommended | Not Supported |
| Specification Scope | Verified Technical Values (E+H FMP51) | Engineering & Procurement Value |
|---|---|---|
| Measurement Principle | Guided Wave Radar (GWR / TDR) | Direct pulse guidance along probe; zero moving mechanical parts |
| Reference Accuracy | Rod Probe: ±2 mm | Coaxial Probe: ±2 mm Cable Probe ≤15 m: ±2 mm | Cable >15 m: ±10 mm |
Fiscal-grade inventory precision with zero measurement drift |
| Maximum Measuring Span | Rod: 10 m (33 ft) | Cable: 45 m (148 ft) | Coaxial: 6 m (20 ft) | Flexible sizing from small dosing skids up to deep storage tanks |
| Process Operating Limits | Temperature: -50 to +200 °C (-58 to +392 °F) Pressure: Vacuum to 40 bar (580 psi) |
Engineered for high-temp reactors and pressurized process vessels |
| Minimum Medium Dielectric (DK) | Coaxial Probe: DK > 1.4 Rod / Cable ≤30 m: DK > 1.6 Cable 30–45 m: DK > 1.9 |
Reliable tracking in low-reflectivity hydrocarbons, mud & solvents |
| Wetted Metallurgy & Liners | 316L (1.4404), Alloy C22, Technical Ceramics, PFA | Complete acid & alkali corrosion protection (NACE MR0175 compliant) |
| Process Connections | Thread: G 3/4" to 1 1/2", MNPT Flange: ASME / DN / JIS standards |
Seamless retrofit into existing vessel nozzle openings |
| Protocol Interoperability | 4-20 mA HART, PROFIBUS PA, FOUNDATION Fieldbus | Native digital integration with DCS/SCADA architectures |
| Safety & Industry Approvals | SIL3 (IEC 61508), WHG, ATEX, FM, CSA, IECEx, NEPSI, EAC, Marine (GL, ABS, LR, BV, DNV) | Full regulatory compliance for hazardous zones and marine deployments |
Need exact pricing, dimensional CAD drawings, or process connection confirmation for the Endress+Hauser Levelflex FMP51? Contact our certified application specialists:
Request Official Quote & Technical Submittal →For low dielectric liquids like liquefied gas, solvents, or refined oils (DK 1.4 to 1.6), we recommend configuring the FMP51 with a coaxial probe layout. The coaxial outer pipe completely confines the microwave energy, preventing pulse dispersion and ensuring precise level reflections even in low-reflectivity media.
The rigid rod probe supports measuring lengths up to 10 meters (33 ft), ideal for turbulent mixing tanks. The flexible cable probe extends up to 45 meters (148 ft) for tall storage silos and deep oil-water separation tanks, maintaining ±2 mm accuracy up to 15 meters and ±10 mm accuracy beyond 15 meters.
Yes. The FMP51 is certified according to IEC 61508 for functional safety, supporting SIL2 in single-device configurations and up to SIL3 in homogeneous redundant 1oo2 system architectures. Complete SIL safety documentation and proof-test protocols are provided with factory orders.
To eliminate banking delays and streamline customs clearance, direct corporate bank transfers are accepted in USD, EUR, and RMB (Yuan), guaranteeing rapid dispatch from our reserve stock.
