The Endress+Hauser Levelflex FMP50 is designed for continuous level measurement in standard liquid tanks, utilities, and light slurries (-20 to +80°C, up to 6 bar).
Extreme Accuracy: ±2mm precision immune to steam, surface foam, and density changes.
Flexible Probes: Rod probe up to 4m and cable probe up to 12m with DK > 1.6 capability.
Safety Certified: SIL 2 / SIL 3 integrity (IEC 61508) with Heartbeat Technology diagnostics.
Fast Supply: Original units in stock with 24h fast quote and global dispatch support.
Traditional differential pressure transmitters or non-contact ultrasonic level sensors often cause false trips due to density shifts, surface agitation, or heavy vapor layers. Levelflex FMP50 addresses these specific plant operating hazards:
The table below outlines the mechanical, thermal, and electrical limits for specifying the FMP50 in industrial utilities and process storage tanks.
| Technical Parameter | Specification Value | Engineering Selection Note |
|---|---|---|
| Measuring Principle | Guided Wave Radar (Time-of-Flight) | High-frequency microwave pulse guided along probe |
| Accuracy Standard | ±2 mm (±0.08 in) | Valid for both rod and cable probe variants |
| Process Temperature | -20 to +80 °C (-4 to +176 °F) | Do not exceed 80 °C at the process flange |
| Process Pressure | Vacuum to 6 bar (87 psi) | Suitable for atmospheric and low-pressure utility tanks |
| Min. Dielectric Constant | DK > 1.6 | Covers hydrocarbons, water, slurries, and solvents |
| Max Measuring Range | Rod: 4 m / Cable: 12 m | Custom-cut lengths available upon request |
| Wetted Materials | 316L SS, PPS, Viton (FKM) | Verify chemical compatibility with Viton seals |
| Process Connections | Thread: G 3/4, MNPT 3/4; Flange: UNI | Fits standard vessel nozzle connections |
| Outputs / Protocols | 4–20 mA HART, PROFIBUS PA, FF | Wireless Bluetooth configuration via SmartBlue App |
| Safety Integrity Level | SIL2 / SIL3 (IEC 61508) | Suitable for safety instrumented overflow protection |
Choosing between FMP50 and FMP51 is purely a matter of temperature, pressure, and aggressive chemical boundaries. Over-specifying FMP51 in basic utility storage tanks unnecessarily inflates capital expenditure.
| Selection Boundary | Levelflex FMP50 (Standard Utility) | Levelflex FMP51 (Severe Process) |
|---|---|---|
| Max Temperature | +80 °C | +200 °C |
| Max Pressure | 6 bar | 40 bar |
| Max Cable Length | 12 m | 45 m |
| Wetted Materials | 316L, PPS, Viton | Hastelloy C, 316L, PTFE |
| Cost Profile | Economical Base Price | High-Spec Premium Price |
| Engineering Guidance | Cuts budget for CIP, fuel & water storage tanks | Required for severe acid & high-pressure reactors |
A: Yes. The guided microwave radar pulse follows the probe through light-to-moderate surface foam and reflects off the true liquid boundary below. Unlike non-contact ultrasonic sensors, foam bubbles do not scatter the radar signal back to the electronics.
A: The minimum dielectric constant required is DK = 1.6. For media with DK < 1.9, a coaxial probe or stilling well is recommended to concentrate the microwave pulse energy for reliable measurement.
A: Use the SmartBlue App on any mobile device via secure Bluetooth communication (up to 10 m range). Commissioning, envelope curve diagnostics, and troubleshooting can be performed safely without opening the enclosure cover.
Need exact pricing for Levelflex FMP50 or assistance choosing probe configurations? Contact our application engineers today for official datasheets, lead times, and competitive volume quotes.
