Cross Tunnel Flow Monitors

Highly Accurate Volumetric Airflow

Profiling For the most precise calculation of tunnel ventilation efficiency, cross-tunnel flow monitors provide true volumetric airflow data. The TunnelTech 801 utilises a dual-sensor ultrasonic transit-time principle. By mounting two transceiver heads diagonally across the tunnel width (up to 40m apart), the system calculates the true average velocity of the entire air mass traveling between them. This non-intrusive method delivers class-leading accuracy that is completely unaffected by temperature, humidity, dust, or traffic flow.