This universal sensor holder allows for just one bite block per patient, and then it locks down to form a custom fit around any size 2, 1, or 0 sensor in either the vertical or horizontal position. The medium bite block will hold all size 0 sensors in both the horizontal and vertical positions, all size 1s and 2s in the horizontal, and some size 1s and 2s in the vertical. The large bite block will hold all size 1s and 2s in the horizontal and vertical, all size 0s in the vertical, and some size 0s in the horizontal. Quick and easy to use, versatile, and autoclavable.