Pac III is a family of single gas measuring units with three different versions to adapt to the most diverse measurement tasks and application conditions: Pac III B can used to measure CO, H2S or O2; Pac III S accepts 20 different sensor types and Pac III E has an optional datalogger and special alarm evaluation for TRGS / ACGIH. Pac III is also equipped with a wide range of power supplies and meets many of the current approvals.