FD 7100
fog detector

The FD 7100 Fog Detector measures atmospheric visibility (meteorological optical range) by determining the amount of light scattered by particles (smoke, dust, haze, fog, rain & snow) in the air that pass through the optical sample volume.

Performance in all weather conditions is achieved with an integrated sensor design that keeps all sensor cabling internal to the sensor for complete protection against the weather. The sensor has look down geometry to reduce window contamination and clogging from blowing snow. The optical windows have continuous duty anti-dew heaters.

The FD 7100 is suitable for offshore marine including renewable energy sites and an explosion-proof version, the FD 7100 Ex is also available for offshore oil and gas sites.

FD 7100 Fog detector


  • Factory adjustable visibility range
  • Proven 42-degree forward scatter angle
  • Ice resistant “look down” geometry
  • Flexible output options
  • Compact, lightweight package
  • Simple installation and maintenance
fog detector diagram