The G460 by GfG is a portable atmospheric monitor that offers up to 6 gas capabilities, including PID for the detection of VOCs and infrared for the detection of CO2. It has a watertight design, 3 year warranty on sensors, operation times of up to 25 hours, sampling pump, datalogger and interchangeable battery packs. GfG, www.gfg-inc.com, (800) 959-0329.