The Endress+Hauser Levelflex FMP56 is engineered for continuous level measurement in dusty solids, cement/grain silos, and plastic granules (-40 to +120°C, vacuum to 16 bar, up to 12m cable range).
We provide factory-direct pricing, official datasheets, and technical calculations for solid silo loads within 24 hours.
Non-contact ultrasonic level sensors and capacitance probes frequently fail in cement, grain, and plastic powder silos due to signal scattering from heavy airborne dust, pneumatic loading noise, and severe downward friction. Levelflex FMP56 solves these specific plant operating hazards:
The specification table below defines the mechanical, thermal, and electrical limits required by engineering procurement teams when specifying FMP56 for bulk storage tanks and silos.
| Technical Parameter | Specification Value | Engineering Selection Note |
|---|---|---|
| Measuring Principle | Guided Wave Radar (Time-of-Flight) | Direct microwave pulse guided along flexible probe |
| Measurement Precision | ±2 mm (±0.08 in) | High repeatability for inventory control |
| Process Temperature Range | -40 to +120 °C (-40 to +248 °F) | Includes high ambient outdoor silo conditions |
| Process Pressure Limit | Vacuum to 16 bar (232 psi) | Fits pressurized pneumatic conveying hoppers |
| Max Cable Tensile Rating | Up to 12 kN (2,698 lbf) | Calculate silo height & bulk density load before installation |
| Min. Dielectric Constant | DK > 1.4 | For DK 1.4...1.9, verify coaxial/stilling well setup |
| Max Measuring Distance | Cable Probe: 12 m (39.4 ft) | Custom cut-to-length options available on request |
| Wetted Seal Materials | 316L, 316Ti, PEEK, PPS, PA | Resists abrasive powders and dry chemicals |
| Output Protocols | 4–20 mA HART, PROFIBUS PA, FF | Supports Bluetooth commissioning via SmartBlue App |
| Safety Integrity & Ex Ratings | SIL3 (IEC 61508) / Dust-Ex ATEX | Certified for combustible dust hazard Zone 20/21/22 |
Selecting between Levelflex FMP56 and heavy-duty FMP57 depends on total tensile load, silo height, and operating temperature. Specifying FMP56 in standard silos under 12m avoids over-budget capital expenditure.
| Selection Parameter | Levelflex FMP56 (Standard Solid Silo) | Levelflex FMP57 (Heavy-Duty Solid Silo) |
|---|---|---|
| Max Tensile Strength | Up to 12 kN | Up to 30 kN |
| Max Cable Length | 12 m (39.4 ft) | 45 m (148 ft) |
| Max Process Temp | +120 °C | +400 °C |
| Max Pressure | 16 bar | 16 bar |
| Cost Investment | Economical Base Cost | Premium Heavy-Duty Price |
| Ideal Silo Applications | Cement hoppers, grain, feed, plastic pellets | Tall coal silos, heavy iron ore, high-temp fly ash |
A: Ensure the total downward pull force calculated from silo depth, discharge rate, and bulk material weight does not exceed 12 kN. If your silo height exceeds 12 meters or handles heavy iron ore, upgrade to the 30 kN cable rating on Levelflex FMP57.
A: Yes. FMP56 accurately detects bulk solids with dielectric constants down to DK = 1.4. For media with DK between 1.4 and 1.9, enabling internal Multi-Echo Tracking or utilizing a coaxial probe configuration ensures high echo signal stability.
A: Yes. FMP56 holds international Dust-Ex certifications including ATEX, IECEx, FM, CSA, and NEPSI, making it fully compliant for hazardous grain, flour, coal dust, and chemical powder silos.
Need immediate pricing for Endress+Hauser Levelflex FMP56 or tensile load calculations for your silo dimensions? Contact our application engineering team today for official datasheets, lead times, and competitive volume pricing.
