Siemens SITRANS LR560 Radar Level Transmitter

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 $4^\circ$ beam angle and a specialized flush lens antenna, it tracks material levels reliably through heavy dust clouds in tall silos up to $100\text{ meters}$ (

328\text{ 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 $78\text{ GHz}$ microwave signals. The narrow $4^\circ$ 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\text{-inch}

NPT air-purge connection allows continuous or periodic blowing to keep the optical cavity clean.

Technical Specifications Matrix

Parameter	Specification Details
Radar Technology	$78\text{ GHz}$ FMCW (Frequency Modulated Continuous Wave)
Measuring Range Options	$40\text{ m}$ ( $131\text{ ft}$ ) or $100\text{ m}$ ( $328\text{ ft}$ )
Beam Angle	$4^\circ$ narrow beam angle
Measurement Accuracy	Greater of $\pm 25\text{ mm}$ ( $\pm 1\text{ in.}$ ) or $0.25\%$ of range
Process Temperature	$-40\text{ °C}$ to $+200\text{ °C}$ ( $-40\text{ °F}$ to $+392\text{ °F}$ )
Process Pressure	Up to $3\text{ bar g}$ ( $43.5\text{ psi g}$ ) max

Component	Standard / Available Materials
Lens Antenna Material	PEEK ( $100\text{ m}$ version) / PEI ( $40\text{ m}$ version)
Enclosure Housing	316L (1.4404) Stainless Steel
Self-Cleaning Purge	$1/8\text{-inch}$ NPT air purge connection ( $30\text{ cfm}$ max $100\text{ psi}$ )
Ingress Protection	IP68 / Type 4X / NEMA 4X/6

Interface	Protocol / Certification
Communications Output	2-wire $4\text{--}20\text{ mA}$ / HART, PROFIBUS PA, FOUNDATION Fieldbus
Display Options	Graphic Local Display Interface (LDI) with Echo Profile view
Process Connections	$3\text{ in.}$ , $4\text{ in.}$ , $6\text{ in.}$ Universal Flat-Faced Flanges (ANSI, DIN, JIS)
Hazardous Area Approvals	ATEX, IECEx, FM, CSA Class I/II/III Div 1/2

Target Industry Applications

Cement and Powder Silos

Accurate level measurement of cement, raw meal, fly ash, and lime in high-dust pneumatic filling conditions.

Grain and Food Processing

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:

Official Siemens Industry Support Portal

Download firmware updates, GSD files, and comprehensive operating instructions directly from Siemens.

Siemens Radar Level Measurement Guide

Explore radar selection guides, accessory kits, and DCS integration libraries for Siemens level sensors.

Key Highlights

Executive Summary and Core Capabilities

Technical Specifications Matrix

Target Industry Applications

External Resources and Documentation

Related Hardware

VEGAPULS 6X Radar Level Sensor