
Specs at a glance
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Accuracy
Rod probe :+/- 2 mm (0.08 in)
Rope probe <= 15 m (49 ft): +/- 2 mm (0.08 in)
Rope probe > 15 m (49 ft): +/- 10 mm (0.39 in)
Coaxial probe: +/- 2 mm (0.08 in) -
Process temperature
-50...+200 °C
(-58...+392 °F) -
Process pressure / max. overpressure limit
Vacuum...40 bar
(Vacuum...580 psi) -
Max. measurement distance
Rod: 10 m (33 ft) Min DK>1.6
Rope: 25 m...30 m (82ft...98 ft) Min DK>1.6;
30m...45 m (98ft...148 ft) Min DK>1,9
Coaxial probe: 6 m (20 ft) Min DK>1.4 -
Main wetted parts
Rod probe:
316L, Alloy C, Ceramic
Rope probe:
316, 316L, Alloy C, Ceramic
Coaxial probe:
316L, Alloy C, Ceramic, PFA
Field of application
Levelflex FMP51 for level measurement even under extreme process conditions like
high temperature and high pressure in the process industry. FMP51 offers maximum reliability even in case of moved surface and foam or when numerous tank baffles interfere with the measurement. Levelflex FMP51 is used for continuous level measurement of liquids, pastes and slurries but also for interface measurement. The measurement is not affected by changing media, temperature changes, gas blankets or vapors.
Version with rod, rope or coax probe.
Process connections: Threads or flange
Temperature: -50 to +200°C (-58 to +392°F)
Pressure: -1 to +40bar (-14.5 to +580psi)
Maximum measuring range: Rod 10m (33ft), rope 45m (148ft), coax 6m (20ft)
Accuracy: ±2mm (0.08")
International explosion protection certificates, overfill prevention WHG, SIL, marine approval, 5-point linearity protocol
Benefits
Reliable measurement even for changing product and process conditions
HistoROM data management concept for fast and easy commissioning, maintenance and diagnostics
Highest reliability due to new Multi-Echo Tracking evaluation
Hardware and software developed according to IEC 61508 up to SIL3
Heartbeat Technology for a cost-effective and safe plant operation during the entire life cycle
Seamless integration into control or asset management systems and intuitive, menu-guided operation concept (on-site or via the control system)
World's easiest proof test for SIL and WHG saves time and costs
Videos
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Time-of-Flight measuring principle
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Commissioning movie for Levelflex FMP5x guided radar and Micropilot FMR5x free space radar
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Unique HistoROM data management concept for safe level measurement
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Continuous adapting algorithms offering safe level measurement due to Multi-Echo Tracking
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Multi-Echo Tracking with Tank Trace marks and traces all echoes signals, not only the level signal - guaranteeing safe measurement at any time
Extended selection
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High-end products
- Highly functional and convenient
Technical excellence
Simplicity

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Standard products
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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Specialized products
- Designed for demanding applications
Technical excellence
Simplicity
Variable
FLEX selections | Technical excellence | Simplicity |
---|---|---|
Fundamental selection Meet your basic measurement needs |
Technical excellence
|
Simplicity
|
Lean selection Handle your core processes easily |
Technical excellence
|
Simplicity
|
Extended selection Optimize your processes with innovative technologies |
Technical excellence
|
Simplicity
|
Xpert selection Master your most challenging applications |
Technical excellence
|
Simplicity
Variable |
Predecessor
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Measuring principle
Guided radar
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Characteristic / Application
Premium device
Rod probe, Rope probe, Coaxial probe
Integrated data memory, Factory precalibrated, Reliable measuring: in case of moved surface + foam, for changing medias. -
Interface measurement
Clean interfaces liquid/ liquid;
Simultaneous measurement of interface and overall level -
Specialities
Heartbeat Technology,
Bluetooth® commissioning,
Operation and maintenance SmartBlue App,
HistoROM,
RFID TAG for easy identification -
Supply / Communication
2-wire (HART/ PROFIBUS PA/ FOUNDATION Fieldbus)
4-wire (HART)
Bluetooth® wireless technology and App (optional) -
Accuracy
Rod probe :+/- 2 mm (0.08 in)
Rope probe <= 15 m (49 ft): +/- 2 mm (0.08 in)
Rope probe > 15 m (49 ft): +/- 10 mm (0.39 in)
Coaxial probe: +/- 2 mm (0.08 in) -
Ambient temperature
-50...+80 °C
(-58...+176 °F) -
Process temperature
-50...+200 °C
(-58...+392 °F) -
Process pressure / max. overpressure limit
Vacuum...40 bar
(Vacuum...580 psi) -
Main wetted parts
Rod probe:
316L, Alloy C, Ceramic
Rope probe:
316, 316L, Alloy C, Ceramic
Coaxial probe:
316L, Alloy C, Ceramic, PFA -
Process connection
Thread:
G3/4...G1 1/2;
MNPT 3/4...MNPT1 1/2
Flange:
ASME 1 1/2"...8",
DN50...DN 200,
JIS 10K -
Sensor length
Rod probe: 10 m (33 ft)
Rope probe: 45 m (148 ft)
Coaxial probe: 6 m (20 ft) -
Max. measurement distance
Rod: 10 m (33 ft) Min DK>1.6
Rope: 25 m...30 m (82ft...98 ft) Min DK>1.6;
30m...45 m (98ft...148 ft) Min DK>1,9
Coaxial probe: 6 m (20 ft) Min DK>1.4 -
Communication
4...20 mA HART
PROFIBUS PA
FOUNDATION Fieldbus
Bluetooth® wireless technology -
Certificates / Approvals
ATEX, FM, CSA C/US, IEC Ex, INMETRO, NEPSI, KC, EAC, JPN Ex, UK Ex
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Safety approvals
Overfill protection WHG
SIL -
Design approvals
EN 10204-3.1
NACE MR0175, MR0103
ASME B31.1, B31.3
AD2000 -
Marine approval
GL/ ABS/ LR/ BV/ DNV
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Options
Sensor remote with 3 m/ 9 ft cable,
Gas-tight feed through,
Remote operation via SmartBlue App using Bluetooth® -
Application limits
Application limits
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