TunnelCraft 3 CO/NO/Visibility Sensor

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Place of Origin:
Derbyshire, United Kingdom
Brand Name:
CODEL TunnelCraft 3
Model Number:
TunnelCraft 3 CO/NO/VIS


TunnelCraft 3 CO/NO/VIS Sensor

CODEL tunnel sensors are designed exclusively for road tunnel applications. Our range of sensors provide all the essential measurements necessary to monitor and control the tunnel atmosphere.
Available as stand-alone sensors or integrated into a network system, CODEL's tunnel sensors are installed in over 350 road and rail tunnels worldwide.


The TunnelCraft III CO/NO/VIS Air Quality Monitor (AQM) uses both infrared light and visible light channels to measure carbon monoxide, nitric oxide and visibility in a single compact instrument.
The AQM consists of a transceiver that projects infrared beams 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, carbon monoxide and nitric oxide concentration
in the tunnel atmosphere.


Measurement of CO & NO by infrared absorption

Maintenance limited to annual cleaning of optical surfaces

High resolution measurement of visibility

Current and relay outputs direct from sensor
Accuracy +/-1ppm for CO, +/-2ppm for NO, 0.0002m-1 for Vis

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

Also available as a single channel instrument
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CODEL International Ltd are specialists in the design and manufacture of high-technology instrumentation for continuous stack emission monitoring, road tunnel atmosphere sensing, and plant safety equipment.

Our simple strategy to design well-engineered, rugged and reliable equipment that is capable of continuous operation over long periods has stood the test of time. With over 25 years experience and constant development of new products and continuous product improvements we have deliv... View detail

Basic Information

Business Type: Manufacturer  
Main Products: Emission Monitors,Gas Analysers,Dust Monitors,Flow Monitors,Tunnel Sensors  
Number Of Employees: 51 - 100 People  

Trade & Market

Main Markets: North America
South America
Eastern Europe
Southeast Asia
Mid East
Eastern Asia
Western Europe
Export Percentage: 81% - 90%  

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Verified Supplier - CODEL International Ltd
United Kingdom | Contact Details
Experience: Established 1982

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Mr. Neil Plumb
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