Opsis AB

Emissions Monitoring for Tunnels - Automobile & Ground Transport

The Opsis monitoring solution is designed for high-quality gas measurement in traffic tunnels. The monitoring systems have been approved by the Germany TÜV and the U.S. EPA among others.

The multi-path capability allows monitoring of large areas and the multi-component capability allows tracking of several compounds simultaneously, for instance

  • Nitrogen dioxide (NO2)
  • Sulphur dioxide (SO2)
  • Nitric oxide (NO)
  • Carbon monoxide (CO)
  • Benzene

Why Opsis?

  • Direct monitoring of NO2
  • Long-time unattended operation
  • Cost-effective, open-path technology
  • High-performance monitoring of criteria pollutants
  • High-performance monitoring of BTX
  • Remote-controlled software
  • Representative path-integrated data
  • Easily calibrated
  • Operates with a minimum of maintenance
  • International approvals


Opsis offers complete software packages for data handling, including data acquisition, validation and reporting. Please refer to EnviMan Data Management System. The software meets the EC regulation for reporting.