AIRFLOW Tunnel Sensors

AIRFLOW is a robust fixed point solution that uses proven ultrasound technology to measure the velocity of air within a tunnel. These measurements can be used as part of an air quality management system for ventilation control within a tunnel or other confined space such as cable tunnels or mining applications.


  • Proven short path ultrasound measurement technique using time of flight differential
  • No moving parts, wear items or other components that require routine replacement
  • Self-contained single component instrument
  • Optional pre-calibrated temperature measurement
  • Intelligent analyser with a range of onboard industry standard outputs
  • TSCU-R compatible


  • Plug and socket connectors simplify the installation and decrease the amount of wiring required
  • Easy to install with no alignment or interconnection required
  • Provides accurate readings which are unaffected by temperature, pressure or humidity
  • Free from moving parts to maximise the lifetime of the sensor
  • Long service intervals with no drift and low long term maintenance requirements
  • IP67 rated and designed specifically for use in tunnels and regular tunnel washing.


For further information and technical specifications about this product please download a product brochure alternatively contact us via phone or email and a member of our team will be happy to help.

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We think of tunnel sensors as one of our most reliable and valuable partners that can provide equipment and technical expertise of highest quality.

Vassilis Moustaferis
New Alert ICT Systems, Greece

Tunnel Sensors



The LUMIOS MkIII measures the level luminance, or brightness, at tunnel portals to ensure that the visual perception of drivers is maintained, both day and night.


The AIRFLOW offers a rugged, non-contact solution for the universal requirement to monitor air velocity and direction in the tunnel.


The VICONOX provides a total monitoring solution
for the measurement of NO2, NO, CO, visibility
and temperature within traffic tunnels.