Mister Harrison had to develop a clock that was not affected by the movement of a ship on the ocean or changes in temperature or atmospheric pressure.
VOA: special.2010.07.14
Scientists in the company's research lab have built an experimental system that captures data, such as a baby's heart rate, temperature and movement, from a series of sensors under the baby's mattress and feeds the information to the parents' PC.
Cao Gadgets is attempting to fill that niche with its functionally named Wireless Sensor Tags -- small devices which monitor movement and temperature, notifying you if anything's amiss.