SIEMENS SITRANS LR250 Polypropylene Lens Radar Level Transmitter


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Siemens SITRANS LR250 Polypropylene lens antenna: A cutting-edge 25 GHz pulse radar level transmitter tailored for continuous monitoring of liquids and slurries in storage and process vessels, even those containing corrosive materials, covering a range of up to 20 meters (65.6 feet).


Featuring a graphical local user interface (LUI), the LR250 enhances setup and operation with an intuitive Quick Start Wizard and echo profile displays for diagnostic support. Startup is streamlined with the Quick Start wizard, requiring only a few parameters for basic operation.

With its unique design, the LR250 enables safe and straightforward programming using the Intrinsically Safe handheld programmer, eliminating the need to open the instrument’s lid.

  • For use in chemical environments where aggressive and corrosive materials are present.
  • Graphical local user interface (LUI) makes operation simple with plug-and-play setup using the intuitive Quick Start Wizard
  • LUI displays echo profiles for diagnostic support
  • Communication using HART or PROFIBUS PA
  • Process Intelligence signal processing for improved measurement reliability and Auto False-Echo Suppression of fixed obstructions
  • Programming using infrared, Intrinsically Safe, handheld programmer or over a network using SIMATIC PDM, Emerson AMS, or Field Device Tools such as PACTware or Fieldcare via SITRANS DTM
  • 3 mm (0.118 inch) accuracy in accordance with IEC 60770-1

Product Data Sheet – Siemen SITRANS LR250 Polypropylene Lens Radar Level Transmitter

Operation Manual – Siemen SITRANS LR250 Radar Level Transmitter with mA/HART


Application Radar Level Transmitter

(Measuring Range)

Minimum Measuring Range:

50 mm (2 inch) from end of antenna

Maximum Measuring Range:

20 m (66 ft)

Output 4 … 20 mA
Measuring Accuracy > 500 mm from sensor reference point: 3 mm (0.118 inch)

< 500 mm from sensor reference point: 25 mm (1 inch)

Operating conditions ‑40 … +80 °C (‑40 … +176 °F) at process connection

Up to 5 bar g (72 psi g) temperature dependent.

Degree of Protection Type 4X/NEMA 4X, Type 6/ NEMA 6, IP67, IP68
Weight Polypropylene lens antenna with 3 inch (80 mm) polypropylene flange

Approximately 3.4 kg (7.5 lb)

Electrical Connections 2 x M20 x 1.5 or 2 x ½” NPT
Explosion Protection IECEx (Dependent on Configuration)
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SIEMENS SITRANS LR250 Polypropylene Lens Radar Level Transmitter

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