SITRANS Probe LU is a 2-wire loop-powered ultrasonic level measurement transmitter for measuring storage vessels, filter beds, and open channel flow in the water and wastewater, food, and chemical industries.

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Please consider the newest transmitter in the series



  • PROFIBUS PA communications
  • Programming via PC software or infrared handheld programmer
  • IP68 rated
  • Level, volume, and flow measurement
  • PVDF or ETFE transducer for chemical compatibility

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


0.25 to 12 m (0.8 to 39 ft)
Process temperature
 -40 to 85 °C (-40 to 185 °F)

- 4 to 20 mA/HART


Wetted Parts
ETFE or PVDF transducers for chemical compatibility
0.15% of range or 6 mm (0.25")
Communications or Outputs


- EDD for SIMATIC PDM for remote configuration and diagnostics

Key Applications
 Chemical storage vessels, filter beds, liquid storage vessels

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Find downloads, support and services for Siemens ultrasonic level measurement.

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Proposed solutions for your queries and direct access to our experts in Technical Support.

Service offers

To remain competitive, companies in industry must ensure – and ideally increase – the availability and productivity of machines and plants. As your partner, we offer a unique range of services and support based on our extensive technology and industry expertise.

Service catalog

As your partner, we offer a unique range of services and support based on our extensive technology and industry expertise. With our offerings, you can expect a high degree of reliability and a successful digital future for your company.

Well trained for excellent handling

Receive standardized or individual expertise directly from the manufacturer – with training centers in more than 60 countries.

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.


What precision and reliability mean for your applications

Your facility is a busy place - and materials and conditions inside your tanks/vessels/wells are always changing. Siemens ultrasonics selects the correct echo after every measurement, giving you stable readings while still allowing rapid response to actual changes in the material level. The result? Operations are more cost-effective. Inventory monitoring is always precise. Processes can be better controlled. And expensive spill cleanups can be avoided.

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