TunnelTech 100 Series Sensors are an essential part of any road or rail tunnel safety system ensuring the tunnel ventilation system provides sufficient clean air for drivers to clearly see the road ahead.

TunnelTech 101: Visibility Monitor
TunnelTech 102: Cold Smoke Monitor

The TunnelTech 101 Visibility Monitor (VIS), is an essential part of any road or rail tunnel safety system. Firstly, it monitors the Visibilty within the tunnel and ensures that the tunnel ventilation system provides sufficient clean air for drivers to clearly see the road ahead. Secondly, used in combination with other TunnelTech 101 VIS monitors, the operator can quickly detect the focus of the fire if it is also equipped with the optional PT100 temperature sensor to accurately measure ambient air temperature in a range of -15 to 105°C.

Fully configurable analogue and alarm outputs are exportable to the tunnel data acquisition system to provide real-time visibility data. This data is also exported via the RS 485 serial port along with the temperature data.

• Continuous measurement of CO, NO and Visibility in road and rail tunnels.
• Class leading Accuracy, Repeatability and Resolution.
• Rugged, corrosion resistant construction.
• Minimal maintenance requirements.
• Optional RS 485 (Modbus) Output.

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