DEVICE FOR DETECTING THE DEGREE OF CONTAMINATION OF A HEART SENSOR SYSTEM

摘要

A simple lightweight apparatus for sensing excessive contamination on the faces of an array of light or infrared detectors (20) comprises mounting a light or infrared-emitting diode (50) near one or more of the detectors (20). When the diode (50) is energized, the associated detector (20) should detect its radiation, thereby indicating that the detector (20) is operable and that contamination is not excessive.