Oxygen Analyzer without alarms comprising: External Sensor with 18 months warranty 2 years warranty on machine T-piece Flow diverter Table stand Coiled cable Batteries Features: Accuracy < 1% under constant conditions Analysis: 0-100% Oxygen LCD screen with backlit Flow sensitivity: none between 0.2 to 10 ltrs per minute Linearity: +/-1% under constant conditions T90 approx. 9 seconds Power: 2 x 1.5 V AA Alkaline batteries for 1200 hrs continuous use Warm up time: none Weight: 280 g