GfG Instrumentation Inc.: The G460 is a rugged, compact instrument for simultaneous detection of up to six gases. Installed sensor options include infrared (NDIR) for CO2 and PID for VOC measurements. The G460 offers completely automatic calibration, one-button operation, top-mounted display and interchangeable battery packs. GfG’s concussion-proof boot, along with the highly dust- and water-resistant housing, protect the instrument in the harshest environments. Data logging and event logging are standard.