LU240 Infographic



The SITRANS Probe LU240 ultrasonic level transmitter is ideal for level, volume, and volume flow measurements in a wide range of applications. It works with liquids, slurries, and bulk materials up to 40 feet (12 meters).

The SITRANS Probe LU240 is ideal for level monitoring in the water and wastewater industry, chemical storage vessels, and small bulk hoppers.

The range of SITRANS Probe LU240 is 20 or 40 ft. (6 or 12 m). Using Process Intelligence, Auto False Echo Suppression for fixed obstruction avoidance, and accuracy of 0.15 % of range or 0.25 inch (6 mm), the Probe LU240 provides unmatched reliability.

The SITRANS Probe LU240 offers HART communication.

The transducer on the SITRANS Probe LU240 is available as ETFE or PVDF to suit the chemical conditions of your application. For applications with varying material and process temperatures, the SITRANS Probe LU240 incorporates an internal temperature sensor to compensate for temperature changes.

Key Applications: chemical storage vessels, filter beds, liquid storage vessels




Measurement Range

0.20 to 12 m (8 inch to 40 ft)

Process Temperature

-40 to 85 °C (-40 to 185 °F)


4 to 20 mA/HART


  • Continuous level measurement up to 12 m (40 ft) range

  • Easy installation and simple start-up

  • Programming using 4-button HMI or SIMATIC PDM

  • Communication using HART

  • Process Intelligence signal processing

  • ETFE or PVDF transducers for chemical compatibility

  • Auto False-Echo Suppression for fixed obstruction avoidance

  • Low power and current startup

Case Study: Simplifying filter bed level measurement with SITRANS Probe LU240

SITRANS Probe LU240 Case Study

The SITRANS Probe LU240 provides a maintenance-free solution with consistent performance for a wastewater treatment plant with a demanding environment.

With non-contacting technology, the issue of buildup developing is virtually non-existent. Furthermore, the mechanical action generated by the piezoelectric crystals used to generate the echo pulse means that ultrasonic devices have self-cleaning faces. literally shaking themselves clean of dirt, condensation and build-up in the application.