Siemens: Choosing your radar liquid level measurement device
25 August 2020
When it comes to accurate and reliable liquid level measurement, Siemens offers two standout radar technologies: Guided Wave Radar (SITRANS LG) and Non-contact Radar (SITRANS LR). Each is suited to different applications, and selecting the right one depends on your process needs.
Siemens Radar at a Glance
SITRANS LG (Guided Wave Radar)
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Uses a probe inserted into the tank
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Ideal for high-pressure, high-temperature, or complex media
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Accurate even with foam, vapours or interface levels
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Suitable for confined or pressurised vessels
SITRANS LR (Non-contact Radar)
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Mounted above the tank with no contact
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Perfect for clean liquids, slurries or large tanks
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Fast, easy installation with Bluetooth setup (LR100/LR110)
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Minimal maintenance and process disruption
Key Considerations
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Tank Size & Access: Choose LG for limited access or narrow tanks; LR for open or large vessels.
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Media Type: Use LG for viscous or layered liquids; LR for clean surfaces.
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Environmental Conditions: Both ranges offer models for extreme temperatures and pressures.
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Setup & Diagnostics: Siemens devices feature simple configuration, built-in diagnostics, and reliable performance.
Quick Guide
| Application | Recommended Device |
|---|---|
| Narrow, pressurised vessels | SITRANS LG250 / LG270 |
| Clean liquids in open tanks | SITRANS LR100 / LR200 |
| Interface or slurry layers | SITRANS LG260 |
| Harsh environments | SITRANS LR500 or LG270 |
Final Thoughts
As Siemens highlights in their video, the right radar device depends on tank design, media behaviour, and installation preferences. Both the LG and LR series deliver high performance, but choosing correctly ensures long-term accuracy and operational ease.
Need help selecting the best radar solution? Get in touch with our team for expert advice and support.