The MaxO2+AE is best used wherever an inline analyzer is required—especially useful with older ventilators or oscillators. Its patented, ergonomic design fits comfortably in your hand and features a simple, one-touch calibration and ON/OFF control. The MaxO2+AE will calibrate to room air (20.9%) or 100% oxygen. For applications that require an internal sensor, check out our MaxO2+ A.