MaxO2+A - Handheld Oxygen Analyzer with Internal SensorThe MAXO2+A was designed with simplicity and portability in mind. This analyzer is ideal for checking oxygen percent accuracy in concentrators. 24 month warranty on both the analyzer and the sensor Internal MAX-250+ Long Life Sensor 5,000+ hours operation on 2 AA batteries Easy one touch calibration Patented ergonomic design fits comfortably in your hand Quickly adapts to bore tube applicationsIncludes Internal Sensor MAX-250+,...