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Pro Trek V.3 Triple Sensor Engine

The new triple sensor has Improved accuracy, is 95% slimmer, and uses 90% less power. Three high-sensitivity miniaturized sensors take accurate measurements of constantly changing natural phenomena, and display directions, differences in altitude, and atmospheric pressure tendencies in both digital and analog formats as well as temperatures in digital format.

Triple Sensor

Three miniature sensors for measuring direction, barometric pressure/altitude, and temperature allow for high-precision detection of sudden changes in natural phenomena.


Measuring altitudes based on changes in atmospheric pressure

Pro Trek Atimeter Graph

The altimeter determines the altitude at your current location based on accumulated atmospheric pressure changes measured by the pressure sensor. Setting the altimeter at a location where you know the precise altitude before starting your ascent enables it to take even more precise altitude measurements.

Sea level measurement

Setting the altimeter at a location where you know the precise altitude enables you to determine the elevation of your current position with respect to sea level. If you come across a marker indicating 400 meters above sea level while hiking or climbing, for example, simply set the altimeter at 400 meters. This enables you to obtain more accurate readings with respect to sea


Atmospheric pressure tendency graph / Atmospheric pressure tendency indicator

Pro Trek Barometer Watch Graph

The barometer measures the atmospheric pressure every two hours automatically and displays the recent atmospheric pressure tendency and the current pressure graphically. level when you take subsequent measurements after moving on.

Forecasting the weather based on the atmospheric
pressure tendency

Pro Trek Barometer Weather Graph

A graphic display of atmospheric pressure readings taken at regular intervals reveals pressure trends at a glance. When the pressure is rising, the weather is likely to improve; when it's falling, there's usually worse weather ahead. This feature can remind you to take your swimming suit along, or alert you to approaching trouble.

Digital Compass  

Bearing Memory [select models only]

Pro Trek Compass Watch Graph

The Bearing Memory memorizes directions detected by the direction measurement function and displays them continuously in graphic format. You can travel straight toward your destination by following a course determined with the memorized direction displayed steadily in the 12 o’clock position on your watch face. This capability also comes in handy when visibility is low due to such factors as trees or fog.

Aligning a map with the surrounding terrain

Pro Trek Compass Graph

If you determine magnetic north with the direction measurement function and place a map beside your watch, you can align the map with the surrounding geography.

Magnetic declination correction

You can change the direction measurement standard from “magnetic north” to “true north” by inputting the magnetic declination data indicated on a topographical map to correct the direction.level when you take subsequent measurements after moving on.


Pro Trek Thermometer Graph

Predicting your destination temperature based on the temperature
at your current location

The temperature generally decreases by approximately 6.5°C with every increase in altitude of 1,000 meters, or 3.6°F with every increase of 1,000 feet. If the temperature at 1,000 meters is 10°C, therefore, the temperature at 3,000 meters will probably be about -3°C.