Abstract: A device for monitoring heart rate and blood oxygen levels using improved pulse oximetry sensors. Pulse oximetry sensors function in either transmission mode or reflectance mode. The device of the present invention provides improved sensors functioning in transmission mode to be useful on anatomical structures with dense tissue, such as the wrist. Additionally, a combination of sensors are used to enhance the performance of monitoring devices using pulse oximetry technology. By combining sensors that function in transmission mode and reflectance mode, quality and accuracy of the monitoring device is enhanced. The data from the sensors are communicated with a microcontroller for analyzing the data. More accurate data collection translates to more accurate analysis using formulas or algorithms. The resulting analysis is conveyed to the user through a display, either digitally or in color.

Abstract: A heart rate monitor provides a display of the user's heart rate range or zone, by displaying a color homogeneously and uniformly across a display field on the device. The heart rate monitor is thus much more easily read and interpreted by a person engaged in vigorous exercise than monitors having relatively small digital numerical displays. The colors may be keyed mnemonically to assist the user in interpreting the display, and/or the user may program the device to display specific colors according to the level of the user. Certain variables, e.g., age and gender of the user, may be input as desired in order to provide greater accuracy for the device. The present heart rate monitor may be configured as a portable device to be worn by the user, or as a device installed with a stationary exercise machine, e.g. treadmill, etc.