SIEMENS SITRANS LU180 Ultrasonic Level Transmitter


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Siemens SITRANS LU180: A short-range integrated ultrasonic level transmitter designed with intrinsic safety in mind, certified for hazardous environments including ATEX, UKEX, CSA, FM, IECEx, and NEPSI. This 2-wire, 4 to 20 mA loop-powered device is perfectly suited 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, available in PVDF copolymer, ensures versatility across a wide array of applications.


The SITRANS LU180 offers ease of installation and maintenance, with the added convenience of quick removal for cleaning, making it particularly suitable for use in industries such as food, beverage, and pharmaceuticals.

Reliable 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 LU180 Ultrasonic Level Transmitter

Operation Manual – Siemen SITRANS LU180 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 IECEx (Dependent on Configuration)
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SIEMENS SITRANS LU180 Ultrasonic Level Transmitter

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