Experimental setup (IMAGE) Eindhoven University of Technology Caption In the left image we see the set-up in which the new tandem photodiode can be used to monitor the heart and respiration rates of a person. The right images show the detected heart and respiration signals recorded with the photodiode at a distance of 130 cm. Credit TU/e | Riccardo Ollearo Usage Restrictions Free use with credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.