MAX-9 Oxygen Sensor. Replacement sensor fits the following manufacturers and models: Airshields [see Hillrom]; Analytical Industries [PSR-11-55]; Hillrom (Airshields) [6736140]; Hudson RCI [See Teleflex Medical]; Mercury Medical [10-103-03]; Pacifitech [PT-05]; Teledyne [R13, #B-39636]; Teleflex Medical (Hudson RCI) [5500, V-05, 5590, 5577, 5584, 5595, 6477].