Endress+Hauser Levelflex FMP51 – Premium Guided Radar for Demanding Liquid Level Applications
The Levelflex FMP51 is a high-performance guided radar level transmitter designed for continuous level measurement and interface measurement of liquids, pastes and slurries in demanding process industries. Based on the time-of-flight guided radar principle, the FMP51 delivers reliable measurement even under extreme conditions such as high temperature, high pressure, foam, vapor and changing media characteristics.
As a premium-level instrument in the Levelflex series, the FMP51 combines advanced signal processing, robust probe design and intelligent diagnostics to provide stable measurement performance in critical industrial applications.
Reliable Guided Radar Measurement Even in Difficult Conditions
The Levelflex FMP51 measures the level by sending high-frequency electromagnetic pulses along a probe. The signal reflection from the medium surface is analyzed to determine the exact level.
Compared with many conventional level technologies, guided radar measurement is highly resistant to process disturbances.
Key performance:
Measuring principle: Guided radar (Time-of-Flight)
Applications:
Continuous liquid level measurement
Interface measurement
Liquids, pastes and slurries
Accuracy:
Rod probe: ±2 mm
Rope probe ≤15 m: ±2 mm
Coaxial probe: ±2 mm
Maximum measuring range:
Rod probe: up to 10 m
Rope probe: up to 45 m
Coaxial probe: up to 6 m
Process temperature: –50 to +200 °C
Process pressure: Vacuum to +40 bar
Wetted materials: 316L, Alloy C, Ceramic, PFA
Communication: HART, PROFIBUS PA, FOUNDATION Fieldbus, Bluetooth
Safety: SIL 2/3, WHG overfill prevention available
Designed for High Temperature and High Pressure Processes
The FMP51 is specifically developed for applications where standard level instruments may not provide sufficient reliability.
Its robust construction supports:
High-temperature process vessels
Pressurized reactors
Chemical processing equipment
Steam-containing applications
Aggressive process environments
With a temperature capability up to 200°C and pressure capability up to 40 bar, the FMP51 provides dependable measurement in demanding industrial conditions.
Stable Measurement with Foam, Vapor and Moving Surfaces
Process conditions can often affect level measurement accuracy, especially when tanks contain:
Foam layers
Gas blankets
Vapors
Agitated surfaces
Changing product characteristics
The Levelflex FMP51 uses advanced Multi-Echo Tracking technology to identify and evaluate relevant signals, improving measurement reliability even in challenging applications.
Continuous Level and Interface Measurement in One Device
The FMP51 can perform both overall level measurement and liquid interface measurement.
Typical interface applications include:
Oil / water separation
Liquid-liquid boundary detection
Settling tanks
Separation vessels
For clean liquid interfaces, the device can simultaneously measure the total level and interface position, reducing the need for multiple instruments.
Flexible Probe Selection for Different Tank Requirements
The Levelflex FMP51 offers multiple probe designs to match different installation conditions.
Rod Probe
Suitable for:
Short measuring distances
Smaller vessels
Stable liquid applications
Maximum range:
Rope Probe
Suitable for:
Tall storage tanks
Long measuring distances
Large process vessels
Maximum range:
Coaxial Probe
Suitable for:
Clean liquids
Applications requiring high measurement stability
Maximum range:
Intelligent Diagnostics and Easy Commissioning
The FMP51 integrates Endress+Hauser digital technologies to simplify operation and maintenance.
Features include:
Heartbeat Technology
Bluetooth commissioning
SmartBlue App operation
HistoROM data management
RFID TAG identification
These functions help reduce commissioning time, improve diagnostics and support efficient instrument management throughout the product lifecycle.
High Safety Performance for Critical Applications
For safety-related processes, the FMP51 supports advanced safety functions including:
SIL capability up to SIL 3
WHG overfill prevention
Explosion protection approvals
Marine approvals
This makes it suitable for applications where measurement reliability and process safety are critical.
Typical Industrial Applications
The Levelflex FMP51 is widely used in:
Chemical plants
Oil & gas processing
Petrochemical facilities
Power generation
Refineries
Storage terminals
Process reactors
Typical measurement points include:
Reactor vessels
Storage tanks
Separators
High-pressure process equipment
Mixing vessels
Frequently Asked Questions
What is the Endress+Hauser Levelflex FMP51 used for?
The FMP51 is used for continuous liquid level measurement and interface measurement in demanding industrial applications, including high-temperature and high-pressure processes.
What is the maximum measuring range of the FMP51?
The maximum measuring range is up to 10 m with rod probe, 45 m with rope probe, and 6 m with coaxial probe.
Can the FMP51 measure through foam and vapor?
Yes. Guided radar technology combined with advanced signal processing provides reliable measurement even with foam, vapor and changing process conditions.
What is the difference between Levelflex FMP50 and FMP51?
The FMP51 is designed for more demanding process conditions, supporting higher temperature, higher pressure and advanced applications compared with the basic FMP50 series.
Can the FMP51 measure interface levels?
Yes. The FMP51 supports liquid-liquid interface measurement for applications such as oil/water separation and process separation vessels.
Which communication protocols are supported by FMP51?
Depending on configuration, the FMP51 supports HART, PROFIBUS PA, FOUNDATION Fieldbus and Bluetooth communication.
