Ultrasonic Level Transmitter

SITRANS Probe LU240 ultrasonic level transmitter is a cost-effective, compact, intelligent level solution for liquid chemical inventory, monitoring small process vessels, and level monitoring measurement in the environmental industry.

SITRANS Probe LU240 Catalog Specifications

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  • HART 7 communications
  • Maintenance-free active face technology keeps the sensor clean
  • IP68 fully potted option with its fully encapsulated PVDF sensor is resistant to corrosion, chemicals and extreme shock
  • State-of-the-art Process Intelligence echo processing
  • Battery and solar-powered friendly, with low start-up current and 10.5-volt operation
  • Reduced blanking distance
  • 4-button user interface  or remote config

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 level measurement switches for back-up, overfill, low level and dry run protection. Click here for more information




0.2 ... 12 m (8 inch ... 40 ft)
Process Temperature
-40 ... +85 °C (-40 ... +185 °F)
4 … 20 mA/HART
Wetted parts
ETFE or PVDF transducers for chemical compatibility
0.15 % of range or 6 mm (0.25 inch)
Communications or Outputs

- HART 7

- EDD for SIMATIC PDM for remote configuration and diagnostics 

- FDT such as PACTware or Fieldcare via SITRANS DTM

Key Applications
water/wastewater chemical storage vessels, small bulk hoppers, filter beds, liquid storage vessels

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Process instrumentation services

Process instrumentation services

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.

Siemens Industry Online Support (SIOS)

Siemens Industry Online Support (SIOS)

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.

Process instrumentation training

Process instrumentation training

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

Process safety

Process safety

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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