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TunnelCraft III CO / Visibility


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The TunnelCraft III CO/VIS Air Quality Monitor (AQM) combines carbon monoxide (CO) and visibility in a single compact instrument.  The AQM consists of a transceiver that projects infrared and visible light to a reflector unit mounted 3m away. The reflected light is received by the transceiver and the specific absorption is measured to determine the visibility dimming coefficient and carbon monoxide concentration in the tunnel atmosphere.

Measurement of CO by infrared absorption

Routine maintenance limited to annual cleaning of optical surfaces

High resolution measurement of visibility

Current and relay outputs direct from sensor
Accuracy +/-1ppm for CO, 0.0002m-1 for visibility

RS232 or RS485 - Modbus output optional
Designed to withstand the harshest environments

Also available as a combined CO/NO/Vis sensor
TunnelCraft III CO/Visibility monitor  

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