Overview
The Siemens SITRANS LR560 (model 7ML5440-0GA00-0AA1) is a 2-wire, 78 GHz FMCW radar level transmitter engineered for continuous, non-contact level monitoring of solids in silos and hoppers. Its long measurement range up to 100 m (328 ft) and narrow 4° beam angle make it ideal for precision level control in bulk solids handling, cement, food, chemicals, and mining applications. The unit operates over a wide temperature range and includes a flush lens antenna with integral aimer for accurate installation.
Key Features
- 78 GHz FMCW radar technology for accurate solids and liquid level detection
- Long-range measurement: up to 100 m (328 ft) for demanding silos and storage vessels
- Narrow 4° beam angle minimizes false reflections and improves accuracy in confined spaces
- 2-wire, 4–20 mA output with HART communication protocol for integration into distributed control systems
- Stainless steel enclosure with PEI or PEEK lens for corrosion resistance
- No moving parts or diaphragms; immune to dust, condensation, and material buildup
- FM, CSA, FCC, and CE approvals for global deployment
Technical Specifications
- Frequency: 78 GHz (FMCW)
- Measurement Range: 40 m (131 ft) or 100 m (328 ft) options
- Process Temperature: −40 °C to +100 °C (−40 °F to +212 °F)
- Output/Communication: 4–20 mA, HART
- Process Connection: 3″ flat-faced flange, ANSI/DIN/JIS compatible, aluminum with integral aimer
- Enclosure: Stainless steel with M20 × 1.5 cable inlet (plastic gland included)
- Beam Angle: 4°
- Pressure Rating: 0.5 bar g (7.5 psi g) maximum
- Approvals: FM, CSA, FCC, CE, UKCA, RED, RCM
- Antenna Type: Flush lens antenna
- Power: 2-wire loop powered
Typical Applications
- Bulk solids level monitoring in silos, hoppers, and bins (cement, flour, minerals, coal)
- Fly ash and powder level control in power generation and industrial boilers
- Storage vessel fill/empty indication in chemical and food processing plants
- Load sharing and bin flow optimization in multi-silo systems
- Material batching and inventory tracking in manufacturing facilities
- Process automation systems requiring HART fieldbus integration
Compatibility & Replacements
Compatible With
- HART-compatible distributed control systems (DCS) and programmable logic controllers (PLCs)
- 4–20 mA analog input modules in industrial automation platforms
- Yokogawa, Honeywell, Emerson, and Siemens SCADA/HMI systems
- HART field communicators and configuration tools
- Standard industry process connections: ANSI, DIN, and JIS flanged vessels
Replaces / Drop-In Replacement For
- Siemens SITRANS LR560 earlier revisions and variants with same flange and connection specifications
- Note: Verify the original model suffix (-0GA00-0AA1, -0GB00-0AA1, -0HB00-0AA1, etc.) matches your installed base to ensure identical process connections and electrical output configurations
- Siemens has discontinued the LR560 series; consult Siemens SITRANS LR500 as an alternative for new system design
Works With
- HART Protocol communication and field instruments
- 4–20 mA analog integration (no special modules required)
- Siemens STEP 7, TIA Portal for parameter configuration and monitoring via HART gateway
- Third-party SCADA platforms supporting HART over 4–20 mA (Wonderware, FactoryTalk, InTouch)
- Pressure transmitter and switch networks in integrated bulk solids management systems
