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Tunnel sensors

Ventilation in tunnels shall provide for adequate breathing air for drivers and maintenance staff in tunnels as well as for sufficient visibility in the tunnel atmosphere which is contaminated with exhaust and dust.
Also emission of pollutants to the environment shall be minimized and in case of fire it shall reduce the effect of heat and smoke.

The units can be mounted quickly. Maintenance is minimized and units can be exchanged in case of malfunction immediately.