Tunnel Atmosphere Monitoring www.codel.co.uk Doc i/d : 100004 Issue : A Rev : 1 Date : 09/11/2010 © 2010 CODEL International Ltd. We reserve the right to modify designs without prior notice CODEL Product Data Sheet Tunnel Atmosphere Monitoring TunnelCraft 3 - Air Quality Monitor CO, NO & Visibility Multi-channel measurement technology to measure CO, NO & Visibility in one compact sensor Designed to withstand the harshest of tunnel environments High resolution measurement of visibility, precision of 1 ppm for CO & 2 ppm for NO Routine maintenance limited to annual cleaning of optical surfaces Low-cost Precision Tunnel Sensors

TunnelCraft 3 - Air Quality Monitor The TunnelCraft 3 Air Quality Monitor (AQM) is CODEL’s industry proven tunnel atmosphere sensor. Three decades of development, knowledge and practical experience have been utilised to produce this advanced-technology tunnel sensor which gives complete flexibility in the choice of measurement options whilst delivering superb accuracy and reliability at a very competitive price. The Air Quality Monitor (AQM) enables the measurements of CO, NO, and visibility to be combined into a single compact sensor, consisting of a transceiver that projects visible and infrared...

TunnelCraft 3 - Air Quality Monitor - System Arrangement Tunnel Atmosphere Monitoring www.codel.co.uk Doc i/d : 100004 Issue : A Rev : 1 Date : 09/11/2010 © 2010 CODEL International Ltd. We reserve the right to modify designs without prior notice RS232/485 Communications Unit* mA Outputs Relay Outputs CODEL TunnelCraft 3 Software* *RS232/485 Communications Unit and TunnelCraft 3 Software are required for commisioning and maintenance use. 12V Power Supply (PSU) (Optional) Mains power in Temporary commissioning equipment

TunnelCraft Software Tunnel Atmosphere Monitoring www.codel.co.uk Doc i/d : 100004 Issue : A Rev : 1 Date : 09/11/2010 © 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 and maintenance of...

A comparison or CODEL Sensors and alternative manufacturer’s Tunnel Atmosphere Monitoring www.codel.co.uk Doc i/d : 100004 Issue : A Rev : 1 Date : 09/11/2010 © 2010 CODEL International Ltd. We reserve the right to modify designs without prior notice Key Design Parameters Open path optical absorption technology used by CODEL has proved to be very accurate and reliable. For maximum performance however certain key design parameters need to be optimised. Path length There is often a misconception that measurements over a longer path length will produce a more accurate reading because more gas is...

Tunnel Atmosphere Monitoring www.codel.co.uk Doc i/d : 100004 Issue : A Rev : 1 Date : 0911/2010 © 2010 CODEL International Ltd. We reserve the right to modify designs without prior notice Overall Dimensions - TunnelCraft 3 Note: All dimensions are in mm 70 400 165 230 90 TunnelCraft III Sensor Head (wt 8.5kg) Note: All dimensions are in mm 430 320 TunnelCraft III Mirror Assembly (wt 7.0kg) Separation: 3000 Overall Dimensions - Power Supply Unit & Tunnel Display Unit (Optional) 200 110 230 160 110 160 Power Supply Unit (PSU) (wt 4kg) Tunnel Display Unit (TDU) (wt 2kg) 225 240 Wall Wall

TunnelCraft 3 Air Quality Monitor - Technical Specification Sensor Unit Compliances Communications & Outputs Services Gas Species Options Single or multi-gas measurements available: CO, NO & Visibility Measuring units ppm for CO & NO, m-1 or m for visibility Path Length 3 meter (6m folded beam) Calibration Automatic zero calibration - manual span check by sealed check cell Measurement Carbon Monoxide (CO) Nitric Oxide (NO) Visibility Measurement Technique Infrared Gas Cell Correlation Infrared Gas Cell Correlation Transmitivity using LED Measurement range (typical*) CO 0 - 300ppm NO 0 - 30ppm...