The GX-2003 personal five-sensor gas monitor pulls samples from up to 40 feet, weighs 11 ounces and measures 100-percent volume combustibles in addition to LEL, O2, CO and H2S. LCD displays all gas readings, battery level and time. Standard alarms include vibration, visual and audible. The unit operates on Ni-Cad pack or AA alkaline batteries.RKI Instruments, Inc., Hayward, CA. AIHCE BOOTH 717