Technology pulse radar
Measurement range 10m (32.8 ft)
Process temperature -40 to 80 °C (-40 to 176 °F)
Pressure (vessel) Up to  5 bar g (72.5 psi g)
Maximum measured error 3 mm (0.118 inch)
Certificates and approvals

Ex iaD 20 tD A20
INMETRO Ex ia IIC T4 Ga, Ex ta IIIC T90°C Da IP67
INMETRO Ex d ia mb IIC T4 Ga/Gb, Ex tb IIIC T90°C Db IP67



  • SITRANS LR250 with threaded PVDF antenna is a 2-wire, 25 GHz pulse radar level transmitter for continuous monitoring of liquids and slurries in storage and process vessels including corrosives or aggresive materials, to a range of 10 m (32.8 ft).
  • SITRANS LR250 includes a graphical local user interface (LUI) that improves setup and operation by including an intuitive
  • Quick Start Wizard, and echo profile displays for diagnostic support. Startup is easy using the Quick Start wizard with a few parameters required for basic operation.
  • The 25 GHz frequency creates a narrow, focused beam allowing for smaller antenna options and decreasing sensitivity to obstructions.
  • SITRANS LR250’s unique design allows safe and simple programming using the Intrinsically Safe handheld programmer without having to open the instrument’s lid.
  • SITRANS LR250 measures superbly in small vessels and in tanks/vessels up to 10 m (32 ft) on materials with dk > 3.

Key Applications: liquid bulk storage tanks, process vessels with agitators, vaporous liquids, temperatures to +80 °C (+176 °F), corrosive and aggressive materials, media with dielectric (dk) ≥ 3 (application dependent) and applications requiring functional safety


  • Fully insulated PVDF antenna design for use in chemical and sanitary environments where aggressive and corrosive materials are used
  • Cost effective replacement for transmitters made of exotic materials
  • 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
  • 25 GHz high frequency and 2" (50 mm) process connection/antenna allow for easy mounting in nozzles
  • Insensitive to mounting location and obstructions, and less sensitive to nozzle interference
  • Short blanking distance for improved minimum measuring range to 50 mm (2") from the end of the antenna
  • Communication using HART® or PROFIBUS PA, or FOUNDATION Fieldbus
  • 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
  • Suitable for use in Safety Related Systems in accordance with IEC 61508/61511 (SIL-2)
  • 3mm (0.118 inch) accuracy in accordance with IEC 60770-1