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.

Tunnel Sensors - A network
of local distributors worldwide

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.

Tunnel Sensors instruments are installed in more than 30 countries wordwide 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.

Solutions built to last

Acoem Tunnel Sensors is a market leader in the design, development and manufacture of tunnel monitoring systems from its modern facility in the UK. As an ISO 9001:2015 certified manufacturer, our standards and quality procedures ensure our product range meets the needs of demanding tunnel environments. Below we take a look at some of the…

New LUMIOS-D, 24Vdc Photometer

Acoem Tunnel Sensors are pleased to announce the expansion of the LUMIOS photometer product range with the addition of a 24vDC powered monitor, the LUMIOS-D.  The new LUMIOS-D monitor provides the same core functions as the standard AC powered LUMIOS-Mklll photometer which is to measure the level of luminance, or brightness, at the tunnel entrance…


Due to continued success and ambitious growth plans, Dynoptic Systems Ltd are pleased to announce an exciting opportunity to join our team as a Senior Technical Support & Service Engineer, based at our head office near Banbury in Oxfordshire. Working with colleagues within the company, partners across the group, and end customers around the world, this role will…
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