In 2002, Airspace Monitoring Systems (AMS), introduced a portable CO monitor designed for passive screening in EMS that was based on AGS™ (Advanced Gas Sensing) solid state technology. AGS™ technology is now the base platform for the Airspace line of solid state portable gas monitors. AGS™ technology doesn’t require routine bump testing or recalibration and offers 5 years of warranted service that includes the sensor. AMS has a strong commitment to lead the industry in affordable gas sensing technology. The AMS line of portable gas monitors are proudly manufactured in Menomonee Falls, Wisconsin.