Advanced Air Quality Monitors for Road and Rail Tunnels
Maintaining strictly regulated air quality and optimal visibility within road and rail tunnels is an absolute safety imperative. Enclosed vehicular environments are uniquely susceptible to the rapid accumulation of toxic combustion exhaust—including Carbon Monoxide (CO), Nitric Oxide (NO), and Nitrogen Dioxide (NO2)—along with dangerous reductions in visibility due to smoke and particulate matter.
The CODEL TunnelTech™ series represents a complete, integrated sensing ecosystem engineered for continuous tunnel atmosphere monitoring. Built to survive aggressive subterranean environments laden with road salt, high humidity, and exhaust gases, these instruments utilize advanced electrochemical cells, ultrasonic time-of-flight technology, and optical transmissometry. By seamlessly exporting real-time, normalized data to tunnel SCADA networks via RS485 Modbus RTU, the TunnelTech suite enables tunnel operators to automate demand-driven ventilation systems, ensuring the efficient removal of toxic gases while protecting public health.
CODEL is a global leader in designing and manufacturing robust, highly accurate tunnel emissions monitors and comprehensive atmospheric monitoring solutions to ensure emissions within tunnels remain within permissible safety limits.
CODEL International Ltd, established in 1982 and integrated into the Forbes Marshall Group in 2014, designs and manufactures cutting edge emission monitoring instrumentation primarily for monitoring the emissions to atmosphere, road tunnel environments and plant and rail safety. With an R&D and manufacturing centre in Bakewell, UK, as well as a manufacturing centre in Pune, India, and a network across 30 countries globally, CODEL is recognised as a market leader in this sector having over 10,000 tunnel instrument installations and 12,000 CEMS installations around the world.
