gas sensor

Tunnel Radio’s gas sensor system is designed to provide precise gas measurements while withstanding harsh and demanding environments. Measuring up to 4 group gases 24/7, the gas level information is then transmitted wirelessly from the primary sources up to the surface. Utilizing state-of-the-art technology, Tunnel Radio’s gas sensors are seamlessly compatible with Tunnel Radio’s MineAx® RFID tracking system to provide underground personnel location and gas levels simultaneously to surface computer systems.



  • Carbon Monoxide – 0 to 680ppm in 1.5ppm increments
  • Methane – 0 to 100% LEL in 0.1% increments
  • Oxygen – 15% to 25% in 0.1% increments
  • Nitrogen Dioxide – 0 to 50ppm in 0.1ppm increments
  • Sulfur Dioxide – 0 to 50ppm in 0.2ppm increments



  • Easy installation: once gas sensing cards are installed, system is collecting data immediately
  • 2 or 4 Gas Monitoring simultaneously
  • Monitor humidity, temperature and barometric pressure
  • Mounts within Tunnel Radio RFID tracking readers
  • Real-time tables and graphs of the past 30 days


  • Seamlessly integrates with MineAx tracking system and software
  • Nation’s only wireless methane detector; all other models are wired
  • Easy installation and calibration
  • Web-based secure remote access