The Model O2 is a versatile, research grade oxygen analyzer measuring 5 to 100% oxygen. The unit includes gas sampling pump, flow controller, LED display, touch panel controls for alarm, flow, and calibration functions, analog and digital RS 232 outputs, and 95 to 250 VAC input at half the cost of competitive units. The Model O2 has US FDA and CE MDD clearances to market in human medical use applications in addition to industrial and other research uses. Software included writes data to Excel graphs. For portable operation, a battery and carrying case accessory is offered.