A reusable pulse oximeter sensor and disposable bandage apparatus includes: a) a reusable pulse oximeter probe assembly with at least one light-emitting diode and one photocell detector wherein the detector and emitter are enclosed in plastic housings one housing having an aperture or radiation transparent window aligned with the emitter and the other housing having an aperture or radiation transparent window aligned with the detector; and b) a bandage strip having adhesive on at least a portion of at least one face thereof and at least two plastic receptacles mounted thereon, each receptacle having at least one aperture or radiation transparent window located therein; wherein the probe housings can matedly engage the bandage receptacles, and transmit and receive light through the apertures or radiation transparent windows of the mated housings and receptacles, and through the appendage of a patient.