SIEMENS SITRANS LU150 Ultrasonic Level Transmitter


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Siemens SITRANS LU150: A compact, short-range integrated ultrasonic level transmitter designed for general-purpose applications. This 2-wire, 4 to 20 mA loop powered transmitter is ideal for measuring liquids, slurries, and bulk materials in both open and closed vessels, with a range of up to 5 meters (16.4 feet). The transducer is constructed from PVDF copolymer, ensuring suitability for a wide variety of applications.


The SITRANS LU150 is characterized by its ease of installation and maintenance, and it can be swiftly removed for cleaning as required, making it particularly suitable for use in the food, beverage, and pharmaceutical industries.

Reliability in level data is ensured through Sonic Intelligence echo processing algorithms. A filter discriminates between true echoes and false echoes caused by acoustic or electrical noise, as well as agitator blades in motion. The ultrasonic pulse propagation time to the material and back is temperature-compensated and converted into distance for display and analog output.

  • Easy to install, program, and maintain
  • Accurate and reliable
  • Sanitary models available
  • Patented Sonic Intelligence echo processing
  • Integral temperature compensation

Product Data Sheet – Siemen SITRANS LU150 Ultrasonic Level Transmitter

Operation Manual – Siemen SITRANS LU150 Ultrasonic Level Transmitter


Application Ultrasonic Level Transmitter

(Measuring Range)

0.25 … 5 m (0.8 … 16.4 ft)
Output 4 … 20 mA
Measuring Accuracy 0.25 % of measuring range (in air)
Operating conditions -20 … +60 °C (-4 … +140 °F)
Degree of Protection IP68 / NEMA 6 / TYPE 6
Weight 1.3 kg (2.9 lb)
Electrical Connections 1 inlet for M20, optional 1/2″ NPT
Explosion Protection NA
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SIEMENS SITRANS LU150 Ultrasonic Level Transmitter

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