The GX-2003 personal five-sensor gas monitor pulls samples from up to 40 feet and measures 100% 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. Weighing just 11 ounces, the unit operates on Ni-Cad pack or AA alkaline batteries. RKI Instruments, Inc., Hayward, CA.