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.

Request a quote…

If you would like a quote for any of our products or services please click below and leave your details.

We have developed a good working relationship and received excellent service throughout the installation and commissioning period. Since then, the instruments have performed very well.

Clive Dyche A.C.M.I.
Medway Tunnels, UK

Tunnel Sensors



The ECOM is a compact electrochemical gas
sensor suitable for continuous monitoring of CO
within ambient environments.


The ENOX is a compact electrochemical gas
sensor suitable for continuous monitoring of NO2
within ambient environments.


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