Detailed PRW-3100 technical specs are here →
About PRW-3100 in Short. Triple Sensor Version 3, advanced CASIO original technology that makes it possible to pack sensors 95% smaller than those of previous models into a totally new type of compact PRO TREK. Despite their smaller size, the new sensors in this model provides improved reading accuracy and energy efficiency.
This new Triple Sensor Version 3 model delivers altitude, barometric pressure, and direction readings that are more accurate than previous models. A Barometric Pressure Tendency Alarm alerts the wearer to sudden changes in pressure readings, which can indicate upcoming weather events.
In terms of both functions and looks, this Triple Sensor Version 3 provides a choice of outdoor timekeeping gear that can’t be beat.
|Price||230$ *average Amazon Price, we may earn commission from purchases|
|Year of First Release||2015|
|Battery Type||Solar (ProTrek Batteries)|
PRW-3100 Model Range *may be updated
*Want to be the first to know about new ProTrek Updates? Here we store all recent Monthly ProTrek Updates →
Official PRW-3100 Specs / Features *for base version PRW-3100YB-1
- Super-Full-Auto LED light
If the ambient light fades, a turn of your wrist illuminates the watch display particularly brightly.
- Low-temperature resistant (-10 °C)
Even temperatures as low as -10 °C have no effect on this watch.
- Solar Power
A solar cell provides power for operation.
- Radio signal reception (EU, USA, Japan, China)
Whether in Europe, North America and Japan or in the outer reaches of Canada, Central America and China – once the watch has been set to the local time, it receives the relevant signal and shows the correct time wherever you are. In many countries, it also sets itself automatically to summer and winter time.
A built-in direction sensor detecs the magnetic north.
- Barometer (260 / 1.100 hPa)
A special sensor measures the air pressure (measuring range: 260 / 1100 hPa) and presents this on the display in the form of a symbol. This enables early detection of weather trends.
- 10,000 m Altimeter
A pressure sensor detects changes in the air pressure and converts the result into an altitude up to 10,000 m.
- Height Gain
The height gain sums all the meters you have climbed in a session, so that you can see at a glance the total ascent on a tour.
- Altimeter data memory
Depending on the model, up to 40 sets of elevation data can be stored in the watch’s data memory and re-accessed at any time. Each of these data sets consists of a measured altitude as well as the date and time. In addition to the individual altitudes, the maximum and minimum altitudes during a measurement are also stored.
- Thermometer (-10°C / +60°C)
A sensor measures the ambient temperature around the watch and displays it in °C (-10°C /+60°C).
- Sunrise/sunset display
After entering the geographical location, sunrise and sunset times can be displayed for any given date.
- World time function
Displays the current time in major cities and specific areas around the world.
- Stopwatch function – 1/10 sec – 1.000 hours
Elapsed time, split time and final time are measured with 1/10-sec accuracy. The watch can measure times of up to 1000 hours.
- Timer – 1/1 min. – 24 hours
For fans of precision: the countdown timers help you to remember specific or recurring events by giving off an audible signal at a preset time. The time can be set to the nearest minute and up to 24 hours in advance. Ideal for people who need to take medicines every day or those who do interval training.
- 5 daily alarms
The daily alarm reminds you about recurring events with an acoustic signal at the time you have set. This model has 5 independent alarms for flexible reminders of important appointments.
- Snooze feature
Each time you stop the alarm, it sounds again after a few minutes.
- Button tones on/off
The button tones for using the mode button can be turned off. This means that the watch no longer beeps when switching from one function to another. Preset alarm or countdown timers remain active when the button tones are deactivated.
- Automatic calendar with Date, Day and Month
Once set, the automatic calendar always displays the correct date.
- 12/24-hour timekeeping
Times can be displayed in either a 12-hour or 24-hour format.
- Mineral glass
The tough mineral glass resists scratching.
- Resin case
- Resin band
Synthetic resin is the ideal material for wrist straps thanks to its extremely durable and flexible properties.
- Battery level indicator
An indicator shows the current battery level.
- Water resistance classification (10 bar)
Perfect for swimming and snorkelling: the watch is water resistant to 10 bar according to ISO 22810.
- Dimensions (H x W x D)
56,0mm x 47,1mm x 12,0mm
approx. 68,0 g
ProTrek PRW-3100 on the wrist!
Feedback from users *accumulated information from our own comments and emails, forum threads, socials, reviews, etc.
+ includes all the G-Shock features and more (e.g., sunrise/sunset times)
+ very clean and readable display. The time is nice and big and easy to see at a glance
+ much thinner than the thinnest men’s G-Shock
+ has 3 sensors not available on the G-Shock
+ stylish and Slim Compared to Other ABC Watches
+ functionally Ideal for Outdoorsmen
– bulk and the messy screens with extraneous circles, flashing data, etc
– much more expensive, of course, but not unreasonably so
The most distinctive specs of PRW-3100 *Editorial
— 100-meter water resistance (good for swimming but not for deep diving)
— Low temperature resistant (stable operation of the watch is guaranteed even at a temperature of -20°C)
— Radio-controlled Watch; Multi band 6 (additional way for time sync. This watch receives time calibration radio signals that keep the displayed time accurate)
— Tough Solar (CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power)
— Digital compass (measures and displays direction as one of 16 points)
— Thermometer (can measure and display the outside temperature in a range from -10 C to 60 C)
— Barometer (measures the air pressures and displays tendencies in the weather)
— Sunrise/sunset display (After entering the geographical location, sunrise and sunset times can be displayed for any given date)
— Altimeter (The electronic mechanism “estimates” the altitude based on the air pressure)
Other ProTrek PRW Watches *similar by price and functions but different by cases
These are not all ProTrek PRW Series. Here is a list of All ProTrek PRW Watches →
PRW-3100 Comparison Table with similar ProTrek Watches
Year of first Release
Radio-controlled (via atomic watch signals)
Radio-controlled (via atomic watch signals)
±15 seconds per month
STN LCD (more distinct and bigger digits)
Cross-Frame Structure (disperses impacts, reinforcing the case’s)
Moon Data (good for fishing and tides)
LED backlight (Super Illuminator)
Super-Full-Auto LED light (If the ambient light fades, a turn of your wrist illuminates the watch display particularly brightly.)
Full auto LED light, LED backlight (Super Illuminator)
Case / bezel material
Resin / Stainless steel
Resin / Stainless steel
Size (mm) *we consider 48.9×42.8×13.4 to be a traditional watch size (as in DW-5600). So you are to compare how far or close the watch is to this size
Full features (if you want to know more)
Enjoy Japanese approaches to Travel and Functional ProTrek Watches!
Every adventure needs a reliable partner. PRO TREK is exactly the kind of watch that you need to meet the demands of your interests. PRO TREK is equipped with functions such as solar power operation, a digital compass, an altimeter, a barometer and a thermometer. The combination of innovative technology, a robust precision movement and state-of-the-art design makes the PRO TREK the perfect companion for all adventures under the open sky. Mountain or valley? Forest or meadow? River or lake? No matter what awaits you, you will be well-prepared to make any rough terrain your own thanks to the PRO TREK.
Experience for yourself how PRO TREK opens up new horizons while always pointing you in the right direction!
Tough Solar. The CASIO Tough Solar System is now so advanced that even the weakest light sources are sufficient to operate the watches. The solar cells are so small and inconspicuous that they can be integrated easily into every watch face design.
An accumulator in solar watches saves “superfluous” energy and releases it when the watch is in darkness. The accumulator is charged automatically and does not require manual activation.
RADIO WATCH TECHNOLOGY.
The advantages of radio-controlled watches are obvious: Once they have been set to the relevant time zone, they always display the exact local time. All CASIO radio watches receive signals almost anywhere in Europe. Some models even receive signals in North America, parts of Canada and Mexico (the radio tower in Fort Collins sends signals for a radius of up to 3200 km) and even in Japan or China. In Europe, the change from summer to winter time is also completely automatic.
Triple Sensor. PRO TREK watches are equipped with the latest Triple Sensor, version 3 technology, making them even more accurate than before. Three highly sensitive, extremely small sensors measure with absolute precision and instantly display changes in your environment. The precision of the digital compass, altimeter, barometer and thermometer is only possible with the Triple Sensor technology. At the same time, the three layer sensor is 95% smaller and consumes 90% less energy than before.
Altimeter. 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.
Barometer. The barometer measures the air pressures and displays tendencies in the weather.
The higher a person goes (ascent/terrain), the lower the barometric pressure will be.
An increase in air pressure usually signifies an improvement in the weather.
A decrease in air pressure usually means that bad weather is on its way.
The air pressure is displayed with an accuracy of 1 hPa (hectopascals).
The barometer can measure and display a range from 260 hPa to 1100 hPa.
The PRO TREK digital compass shows 16 compass points. The direction of magnetic north and the bearing are calculated by the compass’s directional sensor The directional sensor consists of two rectangular coils that detect slight tensions created by the earth’s magnetic field. Depending on the position and direction, these tensions vary in intensity. There is a non-magnetic resistance between the two coils, which absorbs the subtle changes in tension. With each new position, the values that are measured by the resistance change. A microprocessor converts the measurements so that they can be displayed clearly on your watch.
Thermometer. The thermometer is used to measure the outside temperature.
The temperature is displayed with an accuracy of 0.1 °C.
The thermometer can measure and display a range from -10.0°C to 60.0°C.
The watertightness of the CASIO watches complies with DIN 8310 and ISO 22810. These standards describe the various classes of watertightness and the test procedure used to determine watertightness.
These standards apply to the general wristwatch usage. Watches with metre indications for watertightness cannot be used immediately in this water depth, however, as water resistance metre indications are merely a pictorial representation of the test pressure. A wristwatch withstands the impact of water at the static pressure specified on the watch (e.g. 10 bar) and the theoretical immersion in water to the specified depth.
Recent News about PRW-3100
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You ask, we answer…
CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power.
It’s the electronic mechanism that “estimates” the altitude based on the air pressure.
It measures and displays direction as one of 16 points.
It measures the air pressures and displays tendencies in the weather.
Can’t find a ProTrek of your dream? There are more watches!