... 0-3000ppm, 0-5000ppm 2. Detection Principle: NDIR 3.Power: 3.0W/highest, 700MW/average Carbon dioxide CO2 Alarm Specification ... other field which need ventilation control and environmental quality monitoring.3. Hotels, exhibition halls, hospitals, shopping malls, bars, ... reference parameters1. Gas Detection: Carbon dioxide CO22. Product Type: ES-CO23. Detection range: 0-2000ppm, 0-3000ppm, 0-5000ppm4 ...