Rugged Casio watch measures heart rate

  • January 22, 2024
  • Steve Rogerson

Casio’s latest G-Shock shock-resistant watch has an optical heart rate sensor and GPS functionality to perform in harsh natural environments.

The GPR-H1000 belongs to the Rangeman series of timepieces designed to deliver value in survival settings.

It is designed to meet the needs of professionals who work in extreme conditions, delivering performance on land, at sea or in the air with capabilities and functions configured for each of these environments. Among these, the timepieces are equipped with a triple sensor that measures compass bearing, altitude and barometric pressure, and temperature, for use by rangers and other professionals operating in harsh land environments, such as hot, rainy jungles and dense forests.

The watch also comes with an optical sensor for heart rate, an accelerometer for tracking activity such as number of steps taken, and a gyroscope for precise compass calibration. In addition, GPS functionality is included for obtaining location data.

These measurements accurately detect the wearer’s body movement, environmental changes and more, allowing users to monitor conditions such as heart rate, blood oxygen level and direction, even in challenging environments.

The watch is also equipped with measurement functions designed to support nine activities in the field. When trekking, for instance, the watch displays heart rate, distance travelled, altitude and speed of ascent or descent, enabling users to track their physical condition and surrounding environment to support on-the-spot decisions.

Casio ( is an electronics manufacturing corporation headquartered in Tokyo.