The Drager Pac 6500 is part of Draeger's next generation of single gas measuring and warning instruments. The Pac 6500 features a full datalogger, exposure alarms (STEL/TWA) and a powerful battery for 2 years of 24/7 operation (1 year for O?). Drager Pac 6500 Oxygen (O?) - Measuring Range: 0 - 25 Vol%, Resolution: 0.1 Vol% Benefits: 1. Strong performance for maximum safety 2. Easy handling thanks to clear user guidance 3. Robust design ? even for the toughest conditions 4. User- friendly display with all important information 5. 360 alarm with various functions 6. Data logger and event logger for analyses and reports 7. Economical operating costs 8. Fast function test saves time and money