TunnelCraft III Visibility

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The TunnelCraft III Visibility Air Quality Monitor (AQM) uses visible light channels to measure the visibility within a tunnel environment. The AQM consists of a transceiver that projects 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 within the path of the beams.

›	High resolution measurement of visibility	›	Current and relay outputs direct from sensor
›	Accuracy 0.0002m-1 for visibility	›	RS232 or RS485 - Modbus output optional
›	Designed to withstand the harshest of tunnel environments	›	Also available as a combined CO/NO/VIS sensor
›	Maintenance limited to annual cleaning of optical surfaces

TunnelCraft III Visibilty monitor