CASIO PRO TREK — functional watches for outdoor enthusiasts


For all those who set their sights high

  • The built-in altimeter uses a pressure sensor to measure the current air pressure.
  • The measured air pressure is then used to provide an "estimate" of the current altitude.
  • The electronic mechanism in the watch is pre-programmed with "ISA values" ("International Standard Atmosphere") used to convert pressure values into altitude values.
  • The air pressure and temperature generally become lower as the altitude increases.
  • These values define the connection between altitude, air pressure and temperature.