Tunnel Atmosphere Monitoring www.codel.co.uk Doc i/d : 100033 Issue : A Rev : 1 Date : 14/1/2011 © 2010 CODEL International Ltd. We reserve the right to modify designs without prior notice CODEL Product Data Sheet Tunnel Atmosphere Monitoring TunnelCraft 3 - NO2 Monitor Nitrogen Dioxide High accuracy & stability High reliability Zero maintenance Simple operation - no moving components Low-cost Precision Tunnel Sensors Auto zero calibration Low cost of ownership Output in ppb NO2 Span verification by span gas injection

TunnelCraft 3 - NO2 Air Quality Monitor The NO2 Air Quality Monitor is a highly efficient transmissometer configured for the continuous measurement of nitrogen dioxide in road tunnel atmospheres. This extremely stable and reliable monitor incorporates a high-power blue LED to utilise the capacity of nitrogen dioxide to absorb UV and blue light to provide accurate readings in parts per billion. The Problem NO2 is produced naturally by the combustion processes within the internal combustion engine and is emitted from the tail pipes of all types of vehicles. NO2 is also particularly toxic and prolonged...

TunnelCraft 3 - NO2 Monitor - System Arrangement Tunnel Atmosphere Monitoring www.codel.co.uk Doc i/d : 100033 Issue : A Rev : 1 Date : 14/1/2011 © 2010 CODEL International Ltd. We reserve the right to modify designs without prior notice mA Outputs & Relay Outputs CODEL Wincom NO2 Software Data Communications Temporary commissioning equipment 48V DC Power Supply (PSU) Mains power in NO2 Monitor Communication Data Station Control Unit (SCU) Power Supply Unit (PSU)

TunnelCraft 3 - WinCom NO2 Monitor Software Tunnel Atmosphere Monitoring www.codel.co.uk Doc i/d : 100033 Issue : A Rev : 1 Date : 14/1/2011 © 2010 CODEL International Ltd. We reserve the right to modify designs without prior notice Easy installation and set-up Will operate on any Windows based operating system User friendly Alignment Mode to aid initial set-up and optical alignment Allows sensor’s configuration settings to be adjusted Fault diagnostic logging for sensor troubleshooting TunnelCraft 3 Software is supplied with all CODEL Tunnel Sensor’s as standard for the purpose of commissioning...

Tunnel Atmosphere Monitoring www.codel.co.uk Doc i/d : 100033 Issue : A Rev : 1 Date : 14/1/2011 © 2010 CODEL International Ltd. We reserve the right to modify designs without prior notice Note: All dimensions are in mm Note: All dimensions are in mm Overall Dimensions - Tunnel Display Unit (Optional) 200 110 230 160 110 160 Tunnel Display Unit (TDU) (wt 2kg) Power Supply Unit (PSU) (wt 4kg) Tunnel Craft 3 - Overall Dimensions - NO2 Monitor 185 160 1130 NO2 Monitor 600 307 NO2 Monitor & Wall Mounting Bracket 230 200 Station Control Unit (SCU) (wt. 4kg) 110 307 NO2 Mirror & Wall Mounting Bracket...

TunnelCraft 3 NO2 - Technical Specification Sensor Unit Compliances Communications & Outputs Services Measurement NO2 - Nitrogen Dioxide Measuring units ppb (Parts Per Billion) Measurement Principle Specific absorption of blue light Light Source Blue LED Measurement Path 1m Chamber (2m folded beam) Measurement Range 0 - 1ppm standard, configurable up to 0 - 2ppm Accuracy +/- 0.04ppm Detection Limit +/- 0.01ppm Response Time 10 minutes standard, fully configurable Data Refresh 1 second Ambient Temperature -20 to +50°C Power Supply 48V DC, 50VA from Station Control Unit (SCU) Construction Measurement...