Tunnel Sensors

A global leader in the design and manufacture of speciality sensors for tunnel atmosphere monitoring.

Popular Tunnel Sensors

Below are our flagship tunnel sensor products, simply select them for more information



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

Airflow MkII

Airflow MkII

The AIRFLOW MkII is a robust, single point monitor designed to measure air velocity (and temperature when specified) within a tunnel environment.



The CROSSFLOW provides an open path cross bore solution for measuring air velocity and direction in a tunnel.

Acoem Tunnel Sensors - A network
of local distributors worldwide

Acoem Tunnel Sensors is a global leader in the design and manufacture of speciality sensors for tunnel atmosphere monitoring. We design and manufacture our own analysers specifically for pollution monitoring in the traffic tunnel environment.

We bring fresh ideas and technology to a sector that has traditionally used systems adapted from exhaust stack and chimney monitors. Our analysers are designed to be combined in a modular fashion, offering the flexibility to create monitoring systems specifically adapted to the requirements of individual tunnels. Because tunnels throughout the world have diverse requirements for data presentation, our systems also offer a flexible output and communication system that allows seamless integration with any existing tunnel system or bus.

Acoem Tunnel Sensors instruments are installed in more than 30 countries worldwide with references in:

Asia | Europe | Middle East | Americas | Oceania | Africa

Latest news

Keep up to date with the latest product information and news from tunnel sensors.

Thank you to all our customers, suppliers and colleagues for your efforts and business during 2022, we hope to carry our combined achievement forward into 2023 and beyond. We will be closing for the Christmas holiday during the afternoon of Friday 23rd December, we reopen for business on Tuesday 3rd January. From everyone here at…

LUMIOS-IT — Acoem’s in-tunnel photometer

We’re very pleased to release a new variant of our popular LUMIOS tunnel photometer, the LUMIOS-IT. The LUMIOS-IT has been designed to provide accurate and reliable luminance measurements within the tunnel bore. The monitor’s viewing angle is present to 20° and the user configurable, industry standard outputs are suitable for both the Threshold and Interior…

Acoem & Deviteck exhibiting at the Colombian tunnel seminar in Bogota

Acoem Tunnel Sensors and Deviteck, our partner for the Colombian market, will be exhibiting at the Andean tunnel Seminar in Bogotá between the 26th and 28th of October. The seminar is organised by the Colombian Association of Tunnels and Underground Works (ACTOS), providing a network for tunnel designers, engineering specialists and professionals in the fields…
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