Siemens SITRANS LR100 Series Compact Radar Transmitters


  • Easy Bluetooth® wireless technology for easy and quick setup with Siemens SITRANS mobile IQ App
  • 80 GHz narrow beam and small size allows for the easiest installation and commissioning
  • Custom radar microchip means signal killer conditions like condensation, buildup or fluffy solids are no match for the extreme sensitivity of the microchip, the weakest signals are still detected
  • Zero blanking zone allows measurement range right up to the sensor and with an accuracy of 2 mm you can get rid of costly manual measurement methods
  • Digitalization and Industry 4.0 ready with HART 7.0 or optional Modbus RTU for intelligent, value adding data locally or to the cloud

Siemens SITRANS LR100 series Compact Radar Transmitters consists of compact 80 GHz radar transmitters equipped with Bluetooth wireless technology, designed for measuring the levels of liquids or solids. These transmitters offer a narrow beam that allows for adaptable installations in pre-existing vessel openings or non-intrusive measurements through plastic vessels.


Measuring principle 78-82 GHz, FMCW
Measuring range 8 m (26 ft)
Process connections PVDF Thread 1½” and 1
Process pressure -1 to 3 bar
Process temperature -40 to 60 °C (-40 to 140 °F)
Accuracy 5 mm (0.2″)
Beam Angle  8°
mA/Loop, Communications 2-wire, 4 to 20 mA
Ex approvals No
Optional HMI No
Bluetooth Yes


Siemens SITRANS LR100 Series Compact Radar Transmitters_DpstarGroup