The GX-6000 from RKI Instruments allows the user to monitor up to six gases. Two smart sensor slots auto-recognize PID, IR and super toxic sensors. It has five operating modes, including normal, leak check, inert, snap log and bar hole. It comes with a library of over 600 VOCs, PPM Leak Check Mode, man-down and panic alarms, and an auto display rotation. It has an LED light source, internal sample pump and glove-friendly glow-in-the-dark buttons. The unit is lightweight, with a small, rugged IP-67 design. Battery packs are interchangeable and are available in lithium-ion or alkaline. It operates up to 14 hours on the lithium-ion battery pack, and fully recharges in three hours. It has field-replaceable sensors, batteries and filters. 800/754-5165; www.rkiinstruments.com