Tango TX2 Two Gas Detector, Hydrogen Sulfide (0 to 500 ppm in 0.1 ppm increments) and Sulfur Dioxide (0.0 to 150.0 ppm in 0.1 ppm increments). Protect workers, reduce false alarms, and spend less time managing your gas detector fleet. The Tango TX2 uses individual sensors to increase alarm accuracy so you can reduce unnecessary shutdowns and improve incident data quality. A two-year runtime from a single, replaceable battery eliminates the need for charging.