Guided Wave Radar Transmitter

The SITRANS LG series are guided wave radar transmitters for level, level/interface, and volume measurement of liquids and solids. It is unaffected by changes in process conditions, high temperatures and pressures, and steam. The SITRANS LG series comes in four different models, depending on the applications, level of performance, and functionality required.

SITRANS LG Catalog Specifications

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SITRANS LG Guided Radar Level Transmitters:

  • SITRANS LG240 offers configuration options for your hygienic application requirements
  • SITRANS LG250 Highly flexible solution for liquid level and interface applications. Extremely versatile offering solutions for storage, separation of materials or difficult ammonia applications

  • SITRANS LG260 Ideal for measuring level in medium range solids applications including; grains, plastics, and cement

  • SITRANS LG270 offers configuration options for extreme conditions including high temperature and high pressure applications such as: harsh applications found in chemical, HPI and energy industries for example, LPG gas tanks, steam boilers and distillation columns

Supplementary components are designed to work with most types of instrumentation to provide enhanced functionality such as remote displays and remote monitoring solutions. Please find more information here.


Don’t forget that the safest engineered level measurement solution includes switches for back-up, overfill, low level and dry run protection. Click here for more information.


  • High accuracy to +/- 2 mm

  • Advanced diagnostics available for high degree of safety

  • Simple menu-driven display offers ease of setup

  • Large range of options offers reliability in most continuous level measurement applications

  • Ease of maintenance through module design and field replaceable and adjustable probe options

  • Perfect solution for wide range of applications from storage to interface with options for extreme pressure and temperature conditions

  • Universally applicable in liquids, interface, slurries and solids

  • Highly immune to build-up using auto learn function

  • Ability to measure in loss of echo situations with probe end tracking


Guided wave radar
300 ... 75 000 mm (11.81 ... 2 952.75 inch)
Process Temperature
-196 ... +450 °C (-321 ... +842 °F)
Vessel  Pressure
-1 … +400 bar (-100 … +40 000 kPa)
4 ... 20 mA/HART
Modbus: Modbus RTU, Modbus ASCII
Profibus PA
Foundation Fieldbus
DTM/FDT for PACTware 

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Safety integrated

Safety is key in the process industries. A failure in instruments relevant for safety may have serious implications for humans, the process and the environment. Therefore, a wide range of our process instruments come with on-board safety features for maximum risk reduction.


Industry-leading technology for your toughest applications

From liquids to solids to slurries, Siemens guided wave radar is your answer for easy-to-install, versatile level or interface measuring suited to your exact process requirements. Hygienic applications and extreme conditions are no problem with these flexible devices.

Customer Support: 1-800-333-7421

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