--- title: "Siemens SITRANS LR560 Radar Level Transmitter" description: "High-frequency 78 GHz FMCW radar level transmitter designed by Siemens for continuous monitoring of dry bulk solids up to 100 meters in high-dust industrial silos." canonical_url: "https://nodewave.net/store/instrumentation/sitrans-lr560" last_updated: "2026-10-04T04:04:17.847Z" --- The **Siemens SITRANS LR560** is a 2-wire, **78 GHz FMCW radar level transmitter** engineered specifically for continuous level measurement of dry bulk solids. Featuring an exceptionally narrow **4∘4^\circ4∘ beam angle** and a specialized flush lens antenna, it tracks material levels reliably through heavy dust clouds in tall silos up to **100 meters100\text{ meters}100 meters** ( 328 ft 328\text{ ft} 328 ft ). ## Executive Summary and Core Capabilities Monitoring levels in bulk storage silos—such as cement, fly ash, grains, and plastic pellets—presents severe challenges from dust suspension, material buildup, and steep sloped surfaces. The SITRANS LR560 addresses these conditions by emitting short-wavelength 78 GHz 78\text{ GHz} 78 GHz microwave signals. The narrow 4 ∘ 4^\circ 4 ∘ beam ensures the radar signal passes cleanly between narrow nozzles and structural internal rebar, focusing directly on the material surface. **Self-Cleaning Lens & Active Air Purge:** The flush-mounted PEEK/PEI lens antenna is inherently resistant to sticky dust build-up. For extreme applications, an integrated 1 / 8 -inch 1/8\text{-inch} 1/8 -inch NPT air-purge connection allows continuous or periodic blowing to keep the optical cavity clean. - **Narrow 4∘4^\circ4∘ Signal Focus:** Reduces interference from nozzle walls and internal silo obstructions while optimizing signal reflection off sloped bulk solids. - **Integral Aiming Flange:** Optional stainless steel or painted aluminum aiming mechanism allows alignment up to 15 ∘ 15^\circ 1 5 ∘ off-center to point the beam directly at the discharge cone. - **Process Intelligence Firmware:** Embedded signal processing filters out false reflections caused by structural ringing and dust cloud reflections. - **Safe Programming without Opening:** Configure the unit safely in hazardous areas using the intrinsically safe infrared handheld programmer without opening the enclosure lid. - **Industrial IP68 Housing:** Housed in a heavy-duty 316L stainless steel casing rated IP68 / NEMA 4X/6, designed for harsh weather and temperatures up to + 200 °C +200\text{ °C} + 200 °C . --- ## Technical Specifications Matrix
Parameter Specification Details
Radar Technology 78 GHz 78\text{ GHz} 78 GHz FMCW (Frequency Modulated Continuous Wave)
Measuring Range Options 40 m 40\text{ m} 40 m ( 131 ft 131\text{ ft} 131 ft ) or 100 m 100\text{ m} 100 m ( 328 ft 328\text{ ft} 328 ft )
Beam Angle 4 ∘ 4^\circ 4 ∘ narrow beam angle
Measurement Accuracy Greater of ± 25 mm \pm 25\text{ mm} ± 25 mm ( ± 1 in. \pm 1\text{ in.} ± 1 in. ) or 0.25 % 0.25\% 0.25% of range
Process Temperature − 40 °C -40\text{ °C} − 40 °C to + 200 °C +200\text{ °C} + 200 °C ( − 40 °F -40\text{ °F} − 40 °F to + 392 °F +392\text{ °F} + 392 °F )
Process Pressure Up to 3 bar g 3\text{ bar g} 3 bar g ( 43.5 psi g 43.5\text{ psi g} 43.5 psi g ) max
Component Standard / Available Materials
Lens Antenna Material PEEK ( 100 m 100\text{ m} 100 m version) / PEI ( 40 m 40\text{ m} 40 m version)
Enclosure Housing 316L (1.4404) Stainless Steel
Self-Cleaning Purge 1 / 8 -inch 1/8\text{-inch} 1/8 -inch NPT air purge connection ( 30 cfm 30\text{ cfm} 30 cfm max 100 psi 100\text{ psi} 100 psi )
Ingress Protection IP68 / Type 4X / NEMA 4X/6
Interface Protocol / Certification
Communications Output 2-wire 4 – 20 mA 4\text{--}20\text{ mA} 4 – 20 mA / HART, PROFIBUS PA, FOUNDATION Fieldbus
Display Options Graphic Local Display Interface (LDI) with Echo Profile view
Process Connections 3 in. 3\text{ in.} 3 in. , 4 in. 4\text{ in.} 4 in. , 6 in. 6\text{ in.} 6 in. Universal Flat-Faced Flanges (ANSI, DIN, JIS)
Hazardous Area Approvals ATEX, IECEx, FM, CSA Class I/II/III Div 1/2
--- ## Target Industry Applications Accurate level measurement of cement, raw meal, fly ash, and lime in high-dust pneumatic filling conditions. Continuous tracking of corn, wheat, sugar, and wood pellets across long-range storage hoppers. --- ## External Resources and Documentation Access product manuals, drawings, and technical guides directly from Siemens: Download firmware updates, GSD files, and comprehensive operating instructions directly from Siemens. Explore radar selection guides, accessory kits, and DCS integration libraries for Siemens level sensors.