Schweizer Electronic Corporate EN > Level crossing systems > Flex Ray - Obstacle detection / Area monitoring
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flex ray - Obstacle detection / Area monitoring
flex ray - Obstacle detection / Area monitoring

Area of application

  • Obstacle Detection (Detection of objects locked in between LX-barriers)
  • Vehicle detection (outside danger area) for optimized traffic flow on Level crossings in combination with traffic
    light signals
  • Traffic surveillance
flex ray - Application area
flex ray - Application area


  • SIL 3 fail-safe system according to CENELEC resulting from its multi-redundant design
  • Permanent detection of moving and non-moving objects in the entire surveillance area
  • Up to 16 different zones of interest (danger zones) can be configured and evaluated independently
  • Fail-safe operation based on continuous self-testing
  • Several track crossings within the reach of the sensor can be covered by one system, for example additional
  • Maintenance free over the entire lifetime.
  • Not influenced by day to day and seasonal variations
  • Not influences by weather conditions such as rain, fog, snow, ice, etc.
  • For complicated crossing sites, several sensors (up to 8) can be combined to cover the entire LX.
  • No interference with other electronic systems
  • Operates in the free 24 GHz Band with less than 100mW output.


The flex ray system is based on the newest radar technology and has been especially designed for the purpose
of detecting and analyzing road traffic (vehicles and pedestrians).
The technology has proven its capability and reliability in a thousandfold traffic control applications worldwide.

This system takes advantage of state of the art FMCW radar principle (frequency modulated constant wave) in combination with the large frequency bandwidth of 245 MHz. This provides very high accuracy and guarantees reliability of the detection.

The concept of the flex ray is designed as a multi-array-radar consisting of 16 independent but overlapping
radar segments covering the entire surveillance area at the same time. Therefore, no moving parts are required
leading to long and completely maintenance free lifetime of the entire system.

Technical Specification

  • Supply Voltage 24 VDC
  • Emission (Radar) 30 mW (allowed to operate license free)
  • Operation frequency 24.0 – 24.25 GHz
  • Bandwidth 245 MHz
  • Radar principle FMCW (Frequency Modulated Continuous Wave)
  • RF-channels 8
  • Max. # of zones 16 (configures and evaluated independently)
  • View field 90 °
  • Reach 42 m
  • Positioning Height of sensors 2-6 m (depending on local circumstances)
  • Dimensions 336 x 270 x 84 mm
  • Operating temperature range -40° to +74° C
  • Optional functions combined video or photo surveillance integrated data logging collection of traffic information

Products and Services in the Business Area of Level Crossing Systems