The Draeger 8500 Hydrogen Sulfide/ Carbon Monoxide Dual Sensor Single Gas Monitor has full datalogger, exposure alarms (STEL/TWA) and a powerful battery.

Measuring Range: 0 - 200ppm CO | 0 - 100ppm H2S Resolution: 1ppm CO/ 0.1ppm H2S Alarms:
Alarm 1 at 10ppm | Alarm 2 at 15ppm for Hydrogen Sulfide (H2S) Alarm 1 at 35ppm | Alarm 2 at 50ppm for Carbon Monoxide (CO)

Warranty: 2 year