Methane Gas Detection

AMGaDS III (Amerex Mobile Gas Detection System – 3rd Generation) gas monitoring system is a pre-engineered system designed to be utilized on any type of alternately fueled vehicle. The system can be installed by the vehicle OEM or retrofitted. Its advanced technology can detect: Compressed Natural Gas (CNG), Liquefied Natural Gas (LNG), Propane (LPG), Hydrogen and any other hydrocarbon fuel vapors.


AMGADS III utilizes multiple sensors for identifying misdirected gas. The system operates with both a visual and an audible alarm to warn the vehicle operator of potential danger. The system alarms at a trace level (20% LFL) and significant level (50% LFL) of gas concentration. System and sensor operation are constantly monitored and feature zoned sensing capabilities. In addition, AMGADS III features an optional internal relay for automatic control of auxiliary devices (i.e. engine shutdown, fuel valve shutoff, auxiliary alarm, etc.)


  • Engine shutdown and remote alarm capability
  • Low power consumption
  • Ease of installation (modular)
  • Rugged construction
  • Solid state sensors
  • No calibration
  • Self-test circuitry 
  • Low maintenance


  • Light, medium and heavy duty vehicles
  • School buses
  • Shuttle buses
  • Taxi cabs
  • Para-transit vans
  • Transit buses
  • Postal vehicles
  • Delivery vehicles
  • Over-the-road trucks
  • Waste trucks
  • Fork lifts
  • Any vehicle utilizing an alternate fuel