A medical sensor that allows wrapping about an applied part while maintaining the alignment of the detector and emitter is provided. The medical sensor includes a carrier band that can accommodate variably sized applied parts without misaligning the detector and emitter. The medical sensor can provide space between the skin of the applied part and the emitter and detector. The medical sensor carrier band can be designed with a flexible region and thicker mounting sections that act as spring-loaded mounts when the carrier band is secured in a wrapped position.
