LifeDetector detects life signs through clothing and displays green for life and red for no-life on a PDA display.  The instrument is intended for use in chemical or bio-hazard areas such as a battlefield.  If a person is found unconscious in such an environment it may be impractical or life-threatening to break the victims chem-suit barrier.  In this case and particularly in the case of mass-casualty situations, LifeDetector may be used to determine victim status without penetrating the chem-suit barrier.  For added speed of operation and for safety of both the victim and the operator, the Lifedetector measures through body armor - eliminating the need to remove it.  The LifeDetector quickly returns (8-sec) life-signs and will return a no-life indication only after carefully processing signals for 34 seconds to ensure that there are no false negative responses.  LifeDetector uses reliable Micro-radar to detect heart or chest wall motion.