Casio ProTrek PRG-240 — Rotary Bezel & Functional Classic Beauty

*PRG-240-3 – Updated January 2021 color!

Rating: 4 out of 5.
Size★★★
Weight★★★★★
Functions★★★
Materials★★
Battery Years★★★★★
Price★★★★
How did we compose this rating? Enjoy our calculations →

Detailed PRG-240 technical specs are here →

PRG-240 Model Range *may be updated

*Want to be the first to know about new ProTrek Updates? Here we store all recent Monthly ProTrek Updates →


Quick Content Guide


General Information

Price220$ *average Amazon Price, we may earn commission from purchases
Year of First Release2010
Model RangeSOLAR
Battery Type Solar (ProTrek Batteries)
Manual3246 (official)

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Official Description from Casio. The evolution of PROTREK never stops. These new models embody some of the very best in functional beauty and ease of operation that modern technology has to offer.
• The rotary bezel is specially shaped for easy operation, even while wearing gloves. Large letters indicating north, south, east, and west are colored for easy reading.
Dedicated direction, barometer, and altitude buttons provide one-touch access to measurements. Buttons are large with slanted diamond patterns for plenty of slip resistance during operation.
Since “easy to press” often also means “more operation error”, the back cover is designed to make it the same height of the button surfaces, which greatly reduces the chance of operation error. The result is easy button operation, but only when you need it to be.
The number of pointer lines has been increased from 60 to 72 for easier to read World Time and sunrise times. TOUGH SOLAR ensures stable operation even when using power-hungry functions.

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ProTrek PRG-240 on the wrist!

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Feedback from users *accumulated information from our own comments and emails, forum threads, socials, reviews, etc.

PROs
+ solar powered is brilliant, no danger of loosing battery power
+ back light is good with variable time durations
+ the ease of use
+ fantastic looking watch
+ a huge array of functions. Great quality
+ the structure is very durable made to last in all conditions but do not test it as if you were Gshock

CONs
– temperature is the temp of your wrist
– the altimeter to be erratic
– the strap loop is very resitent although it can bother if the watch is snug to the wrist
– the wind rose ring external is not snap, so it moves with the friction of the clothes, as it only serves when we orient it with respect to the digital compass

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The most distinctive specs of PRG-240 *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)
— 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)
Altimeter (The electronic mechanism “estimates” the altitude based on the air pressure)
Duplex LCD (Giving you a constant overview: Elements on the display are distinguished from one another using colour. This is achieved using different coloured layers placed on top of one another, allowing information to be displayed more clearly)

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Other ProTrek PRG Watches *similar by price and functions but different by cases

These are not all ProTrek PRG Series. Here is a list of All ProTrek PRG Watches →

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PRG-240 Comparison Table with similar ProTrek Watches


PRG-240

Price (Amazon)

Year of first Release

2010

2010

Accuracy

±15 seconds per month

±15 seconds per month

SmartWatch Features

No

No

STN LCD (more distinct and bigger digits)

No

No

Cross-Frame Structure (disperses impacts, reinforcing the case’s)

No

No

Moon Data (good for fishing and tides)

No

No

Light

Full auto EL light, Electro-luminescent backlight

Full auto EL light, Electro-luminescent backlight

Case / bezel material

Resin

Resin

Glass

Mineral glass

Mineral glass

Battery

Solar powered CTL1616

Solar powered CTL1616

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

57.3×50.9×15.3

57.3x50.9x15.3


Full features (if you want to know more)

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Official PRG-240 Specs / Features *for base version PRG-240-1

  • Case / bezel material: Resin
  • Resin Band
  • Mineral Glass
  • Direction Bezel
  • 100-meter water resistance
  • Electro-luminescent backlight
    Full auto EL light, selectable illumination duration, afterglow
  • Solar powered
  • Low-temperature resistant (-10 °C/14 °F)
  • Digital compass
    Measures and displays direction as one of 16 points
    Measuring range: 0° to 359°
    Measuring unit: 1°
    20 seconds continuous measurement
    Graphic direction pointer
    Bidirectional calibration and northerly calibration function
    Magnetic declination correction
    Bearing memory
  • Altimeter
    Measuring range: -700 to 10,000 m (-2,300 to 32,800 ft.)
    Measuring unit: 5 m (20 ft.)
    Manual memory measurements
    (up to 25 records, each including altitude, date, time)
    High Altitude / Low Altitude memory
    Total Ascent / Descent memory
    Others: Reference altitude setting, Altitude tendency graph, Altitude differential
    *Changeover between meters (m) and feet (ft)
  • Barometer
    Display range: 260 to 1,100 hPa (7.65 to 32.45 inHg)
    Display unit: 1 hPa (0.05 inHg)
    Atmospheric pressure tendency graph
    Atmospheric pressure differential graphic
    *Changeover between hPa and inHg
  • Thermometer
    Display range: -10 to 60 °C (14 to 140 °F)
    Display unit: 0.1 °C (0.2 °F)
    *Changeover between Celsius (°C) and Fahrenheit (°F)
  • Duplex LC display
  • World time
    31 time zones (48 cities), city code display, daylight saving on/off
  • Sunrise, sunset time display
    Sunrise time and sunset time for specific date, Daylight pointers
  • 1/100-second stopwatch
    Measuring capacity: 23:59’59.99”
    Measuring modes: Elapsed time, split time, 1st-2nd place times
  • Countdown timer
    Measuring unit: 1 second
    Countdown start time setting range: 24 hours
    Countdown start time setting range: 1 minute to 24 hours (1- minute increments and 1-hour increments)
  • Daily alarms
    5 independent daily alarms
  • Hourly time signal
  • Battery level indicator
  • Power Saving (Display goes blank to save power when the watch is left in the dark.)
  • Full auto-calendar (to year 2099)
  • 12/24-hour format
  • Button operation tone on/off
  • Regular timekeeping:
    Hour, minute, second, pm, year, month, date, day
  • Accuracy: ±15 seconds per month
  • Approx. battery operating time:
    6 months on rechargeable battery (operation period with normal use without exposure to light after charge)
    23 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
  • Size of case : 57.3×50.9×15.3mm
  • Total weight : 65.4g

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Enjoy Japanese approaches to Travel and Functional ProTrek Watches!

ProTrek Philosophy.
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.

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.

Digital Compass.
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.

WATERTIGHTNESS.
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.

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Recent News about PRG-240 

All Casio PRG-240 News →

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You ask, we answer…

What does Tough Solar in PRG-240 mean?

CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power.

What is Altimeter in PRG-240?

It’s the electronic mechanism that “estimates” the altitude based on the air pressure.

How does Digital compass in PRG-240 work?

It measures and displays direction as one of 16 points.

What does Duplex LCD in PRG-240 do?

Giving you a constant overview: Elements on the display are distinguished from one another using colour. This is achieved using different coloured layers placed on top of one another, allowing information to be displayed more clearly.


Can’t find a ProTrek of your dream? There are more watches!

Back to all ProTrek Models

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