The underlying technology was developed to identify victims of natural disasters by locating sources of heartbeats in rubble piles.
Developed by the Department of Homeland Security's Science and Technology Directorate, Washington, and NASA's Jet Propulsion Laboratory in Pasadena, Calif. it was named Finding Individuals for Disaster and Emergency Response, or FINDER.
FINDER was created to detect a human heartbeat buried beneath 30 feet (9 meters) of crushed material, hidden behind 20 feet (6 meters) of solid concrete, and from a distance of 100 feet (30 meters) in open space.
Now the system is being used in a home monitor.
Welbi is unique among vital sign monitors in that the person being monitored does not need to wear