Level Instrumentation > Transmitters > Siemens SITRANS Probe LR


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Siemens SITRANS Probe LR Radar Level Transmitter

Siemens SITRANS Probe LR is a two-wire, 6 GHz loop-powered radar level and volume transmitter in an impact- and corrosion-resistant plastic enclosure, for continuous monitoring of liquids and slurries in storage vessels. The sensor is virtually unaffected by atmospheres with volatile vapors, pressure or temperature extremes, vacuums, or dust.

Probe LR's display shows fault messages, signal status, loop current, echo status, distance to material, or any parameter you program. Start-up is easy with as few as two parameters for basic operation. Probe LR is designed for safe and simple programming without having to open the instrument’s lid, using SIMATIC PDM, HART® handheld communicator or the Intrinsically Safe handheld programmer.

Looking for a two-wire radar device with an aluminum enclosure? See the SITRANS LR200.

Key Specifications

  • Microwave Radar Technology for Level and Volume Measurement
  • Uni-Construction Rod Antenna with 100mm or 250mm Shield
  • Measurement Range to 65 Feet
  • Patented Self-Learning Algorithm Ignores False Echoes from Fixed Obstructions
  • SIMATIC PDM and Hart Included Standard for Digital Communications and Remote Programming
  • Corrosion-Resistant Plastic Enclosure Rated NEMA 4X/Type 4X, IP67/NEMA 6, IP68 for Ingress Protection
  • Click here to view our full offering of Siemens Milltronics level instrumentation

Specifications, Manuals, and Supporting Literature

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Model Selection Guide

Use this table to find the right model for your application.  Don't see the option you need? Call a Lesman sales specialist at 800-953-7626

Make one choice from each table section. A complete catalog number will look like this: 7ML5430-_ _ _10.

Description Catalog
Sitrans Probe LR Radar Level Transmitter: PBT Enclosure, Two 0.5" NPT Cable Inlets  7ML5430-
Antenna 1.5" NPT, Integral 100 mm Shield
1.5" NPT, Integral 250 mm Shield
1A_ _ _
1D_ _ _
Approvals [1]  FM, CSA General Purpose
FM Class I, II, III, Div 1 Grps A–G Intrinsically Safe (with Suitable Barrier)
_ _B_ _
_ _D_ _
Output HART Communications and 4-20 mA _ _ _10


[1] All approvals include radio FCC 6.3 GHz; Unit only rated FM intrinsically safe when used with a suitable barrier.


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