The O2A010 oxygen analyzer is smart and fast to measure oxygen purity of 20%-95.9% in the range of 1-10LPM correctly. High accuracy(±1.8%) makes the measured result more reliable. One button simple design makes your operation convenient. See oxygen purity, flow rate, outlet pressure and oxygen temperature on the unit’s 2.2-inch LCD screen at one glance. Fast charging via USB interface, a single charge can run continuously for 48 hours.