AIRFLOW Direction Model for Tunnels

AIRFLOW offers a rugged, non-contact solution for the universal requirement to monitor air velocity and direction in any tunnel application. AIRFLOW is a low cost, low maintenance solution that is ideally suited to tunnel environments. A modern design, using the latest technology and components, housed in a stainless-steel enclosure – this instrument is closest yet to a “fit and forget” airflow monitor.

The AIRFLOW tunnel monitor is a self contained Transceiver (TRX) designed to be mounted on the tunnel wall. It consists of a square enclosure base, which is populated with four ultrasound transceivers and a reflection “roof”, suspended over the ultrasound transceivers.Ultrasound signals are emitted from the transceivers and are bounced off the “roof”. The reflected signals are then received by the transceivers. The time taken for the ultrasound to travel this reflected path is accurately measured and the velocity (and direction) of air can be calculated.