An electrochemical sensor for confined-space and other uses. (Focus on Sensors).

This new electrochemical sensor, the DragerSensor XS-2 [H.sub.2]S sensor, tracks hydrogen sulfide ([H.sub.2]S) levels, and resists damage from overexposure to high [H.sub.2]S gas concentrations (photo, lower left). Its patented three-electrode is said to provide excellent specificity …