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Why SITRANS LR100 series?

Designed to reduce commissioning effort and long-term maintenance, the SITRANS LR100 series supports safer, more reliable level measurement in demanding environments. Five models cover basic to advanced requirements, combining high signal sensitivity, stable performance and portfolio flexibility to match your application and budget.

Simplify setup with wireless commissioning

Enable fast commissioning using Bluetooth wireless technology and the Siemens SITRANS mobile IQ App. Configure, monitor and adjust devices quickly from a mobile device, reducing on-site effort and time spent in hazardous areas.

Install easily in applications

Adapt installations easily with a compact design and narrow 80 GHz beam. Fits existing vessel openings, avoids obstructions, and supports non-intrusive mounting through plastic vessels to simplify installation and commissioning.

Gain reliable, digital-ready measurements

Capture accurate level data with an extremely sensitive custom radar microchip for reliable measurements. Measure up to the sensor with zero blanking and 2 mm accuracy, and enable digitalization via HART 7 or optional Modbus RTU.

Key details

SITRANS LR100

For short distances with a cable; basic 4–20 mA; range to 10 m

SITRANS LR110

HART or Modbus communication; hazardous approval options; range to 20 m

SITRANS LR120

HART or Modbus communication; optional submergence shield for flooding protection; longest range to 30 m

SITRANS LR140

For short distances; for basic measurements; range to 10 m with terminal connection

SITRANS LR150

Local HMI; with HART communication, hazardous approvals; range to 20 m

Featured Capabilities

Reliable readings for applications with condensation

Condensation can affect level measurement, but SITRANS LR100 overcomes it. With extreme radar sensitivity and intuitive setup using the SITRANS mobile IQ app, the transmitter continues to deliver accurate, reliable readings in harsh, moisture‑heavy environments.

Very low power consumption

SITRANS LR100 enables long‑term operation in remote applications by combining very low power consumption with fast power‑up, minimizing battery drain and making it ideal for self‑powered and solar installations.

Maintain continuous measurement in flooded conditions

Uses a submergence shield to protect the sensor during flooding, prevent material buildup and maintain continuous measurement, delivering reliable, maintenance‑free operation in unmanned remote wetwells.

Safer, faster commissioning with SITRANS mobile IQ

Commission SITRANS LR100 radar quickly and safely using the free SITRANS mobile IQ app. Configure, verify and diagnose devices from ground level without entering confined spaces and climbing tank tops or risking exposure to hazardous materials. No manuals required. The app supports iOS, Android and Windows devices for simple, intuitive setup.

Frequently asked questions

Additional resources and related products

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