Tunnels are a special type of tubular structure. With the increase in traffic volume, smoke, diesel exhaust, and CO concentrations continuously rise. Not only do they pose harm to the environment, but they also affect visibility within the tunnel. If not discharged properly and in a timely manner, they can directly threaten the safety of personnel and traffic.

2. The HS-COVINO-MN is designed for online collection of VI/CO data within tunnels, providing reliable data for traffic monitoring departments to ensure tunnel ventilation and road traffic flow. The V analyzer consists of an emission/reception unit and a reflection unit. Installed at a distance of 3 meters, the total light path after reflection is 6 meters. The light is attenuated by dust, and the signal is processed into a measured value by the evaluation unit. The analyzer automatically compensates for the effects of contamination and long-term drift. CO concentration is measured using the negative gas absorption method at the predetermined CO infrared absorption spectrum wavelength of 4.5-4.9 micrometers.

3. The HS-COVINO-MN detector is unaffected by environmental interference light and features self-check and automatic calibration functions.