The G460 multi-gas detector from GfG Instrumentation is a rugged, compact instrument for simultaneous detection of up to 7 gases. O2, LEL, CO and H2S sensors are warranted for three full years. Additional sensor choices include a wide selection of toxic as well as infrared (NDIR) sensors for combustible gas and PID for toxic VOCs. GfG Instrumentation, Inc.,, (800) 959-0329. products