The new compact RECON-IS Series personalgas detectorsare approved intrinsically safe and feature a large easy-to-read LCD. Instruments are available for monitoring CO, H2S, or O2. Features include a 2-year lithium battery, two instant alarms with audio/visual and vibratory indicators, plus STEL and TWA alarms for CO and H2S. EnMet Corp.,, 734-761-1270.Single-gas  portable detectors