Development of Sports Watch with Electronic Altimeter and Barometer

Abstract

A sports watch, "Altimeter", Cal. C040/C046, for outdoor sports such as mountain climbing and sky sports has been successfully produced. This watch can measure atmospheric pressure by means of semiconductor sensor, and permits calculation of altitude. The development of a pressure sensor which is highly sensible and an atmospheric pressure measuring IC which is highly reliable and low in power consumption has realized the production of this watch. An altimeter which is compact, accurate, and possible to measure even at -20℃ is equipped to this watch.