www.safetyandhealthmagazine.com/articles/gas-monitor-modem-2

Gas monitor modem

January 25, 2011
This ATEX-certified modem is long-range and wireless, and can communicate sensor data and GPS coordinates to a PC running safety-monitoring software to view and track sensors and response personnel. The modem transmits system data up to 2 miles and includes three programmable and interchangeable operation modes.

RAE Systems Inc.