Casio PROTREK Slim Line Series Solar Multiband 6 Triple Sensor Ver.3 Men's Watch PRW-3100-1ADR

3.9 out of 5 stars 12 ratings

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Package Dimensions ‏ : ‎ 4.7 x 4.4 x 3.8 inches; 2.4 Ounces
  • Item model number ‏ : ‎ PRW3100-1
  • Department ‏ : ‎ Unisex-adult
  • Date First Available ‏ : ‎ November 3, 2015
  • Manufacturer ‏ : ‎ Casio
  • ASIN ‏ : ‎ B017I5NMIQ
  • Customer Reviews:
    3.9 out of 5 stars 12 ratings

Product specifications

Watch Information
Brand, Seller, or Collection Name Casio
Model number PRW3100-1
Part Number PRW3100-1
Item Shape Round
Dial window material type Mineral
Display Type Digital
Case diameter 42 millimeters
Case Thickness 13 millimeters
Band Material Soft urethane
Band width 17 millimeters
Band Color Black
Dial color Silver
Item weight 2.4 Ounces
Movement Quartz
Water resistant depth 10 centimeters
Warranty If this product is sold by Amazon, please review the manufacturer’s website for warranty information. If this product is sold by another party, please contact the seller directly for warranty information for this product. You may also be able to find warranty information on the manufacturer’s website.

Customer Questions & Answers

Customer reviews

3.9 out of 5 stars
3.9 out of 5
12 global ratings

Top reviews from the United States

Reviewed in the United States on September 20, 2016
Verified Purchase
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5.0 out of 5 stars Stylish and Slim Compared to Other ABC Watches, Functionally Ideal for Outdoorsmen
By GaGator on September 20, 2016
The PRW 3100 is an outdoorsman's watch and a bit more than that. All 11 of it's functional modes work as advertised.

Lets start with it's barometer mode. It displays the current, relative barometric pressure reading, a barometric pressure trend graph and the current air temperature in one screen. It senses the "relative barometric pressure", not " sea level barometric pressure", which is reported periodically by the nearest NWS weather station. Sea level barometric pressure is calculated from an algorithm that uses relative barometric pressure and temperature as input.

Trekkers use relative barometric pressure readings to evaluate near term weather conditions and the trend graph to predict approaching weather systems. Depending on one's location, readings that fall within certain barometric pressure ranges indicate impending weather conditions such as: dry and stable, wet and drizzly, stormy and unstable and severe. A trend graph showing sharp declines in barometric pressure indicates approaching storms or fronts. A sharp rise in barometric pressure predicts approaching good weather conditions. When it comes to weather predictions, I've found the PRW 3100's relative barometric pressure readings and trend graphs to be just as reliable as those reported by weather forecasters using sea level barometric pressure data.

How accurate is the PRW 3100's barometer? It's incredibly accurate. I compared it to the barometer on my iPhone 6 using the Barometer & Altimeter App. I found them to be always in total agreement. What's interesting is that the iPhone 6 App also provides sea level barometric pressure using its own algorithm. So when I check it's reading of sea level barometric pressure versus that of the nearest NWS weather station, situated 3 miles away at the same altitude, they are always in total agreement as well. That proves to me that the PRW 3100 is pretty doggone accurate.

Lets move on to the PRW 3100's altimeter. The PRW 3100's barometric and temperature sensors provide important input data to the altimeter which I have found to be sufficiently accurate for trekking purposes provided that you enter a reference altitude at your starting point and periodically update it at points along your trek. If you don't, altimeter readings are likely to be skewed by weather changes that can impact barometric pressure and temperatures in addition to changes in altitude. Reference altitudes are best acquired by taking altimeter readings at landmarks and unique geographical features indicated on a topo map, comparing the reading with the true altitude indicated on the topo map and updating the reference altitude accordingly. Unique geographical features such as trail embarkation points, trail intersections, crossroads, creek junctures, mountain peaks, water falls, rock formations, USGS benchmarks, etc. are ideal calibration points. An important thing to remember is that after one calibrates the altimeter at the starting point, be sure to zero out all stored automatic records of altimeter data and statistics prior to starting one's trek. Otherwise the stored data and statistics from a previous trek will be combined with the new trek's recorded information producing totally inaccurate the results. For the same aforementioned reasons one should always wear their watch while taking altimeter readings. Variations in atmospheric temperature are more accurately sensed with the watch attached the wrist where one's body surface temperature is a constant. Performing the aforementioned steps will not consistently achieve the precise accuracy an aviator or land surveyor would expect from their instruments and methodology. From my experience you'd be lucky to achieve results no better than +/- 10 feet. For me that's good enough. Other contributing factors to the PRW 3100's inaccuracy are the way it records and displays altimeter data and statistical values. For example the altimeter displays altitude in 5 foot (1 meter) increments and records statistical values (max/min altitudes and cumulative assents/descents ) in 49 foot (15 meters) increments. You also have to consider the elevation above ground that one's watch is positioned when reading the altimeter. In my case it's about 3.5 feet.. All things considered fine precision is not only impossible but impractical. For trekking purposes one only needs a reasonably good estimate to establish or confirm one's position and to assess one's situation compared to expectations. If one thinks that a hand-held GPSS Tracker, GPSS Watch or iPhone 6 can achieve better accuracy, think again. They can be even less accurate than PRW 3100. Typically their positioning accuracy is +/- 30 feet (10 meters) and the altitude reading is taken from the nearest USGS contour line which could be another 20 to 40 feet away. Draw your own conclusions. GPSS based devices also consume battery energy at a much greater rate than the PRW 3100 and they are bulkier and heavier to carry. A GPSS tracker devise has one significant advantage: it displays your position and tracks your progress on a downloaded topo map. That feature simplifies navigation and minimizes your chance of getting lost so long as it's battery lasts. When trekking In unfamiliar areas the PRW 3100 does require you to carry a topo map and do your own tracking. Personally I've never had a problem doing that. I've always relied on a topo map and a magnetic compass to navigate through wilderness areas. Navigating in this way has made me a much better woodsman, more keenly aware of my surroundings, better able to read sign and sense the presence and movement of wild game in my vicinity.

The data recall mode retrieves stored data and various statistics related to the altimeter function. It's based on three methods of recording altimeter data and the way statistics are generated from the data recorded. One can record altimeter readings manually or automatically at regular time intervals as you trek along towards your destination. Each altimeter recording of altitude includes the time and date of the reading. Prior to starting off on your trek you can select one, two or all three altimeter recording options: one, to manually record an altimeter reading at specific locations (up to 30); two, to automatically record or update altimeter statistics whenever activating the altimeter and; three, to automatically record or update of altimeter statistics when activating a specific trek log (up to 14). The preference in choosing a particular option depends on the type of trek, purpose, or goal contemplated. You can tailor it to any type of situation: wilderness trail hikes, backcountry fishing or hunting excursions, mountain climbs, orienteering contests, etc..

The compass mode is straight forward and is as easy to use as any magnetic compass. And it's sufficiently accurate. The digital compass sensor is always in total agreement with my magnetic compass, which I always carry as a backup.

So far, my description of the PRW 3100's trekking functions is a bit superficial. You should thoroughly familiarize yourself with the user's guide (Module No. 3444). The manual is written in 6 different languages in fine print, which makes it a little bulky to carry and not very easy to read on a bus or train. But you can download it as a pdf file onto your smart phone or tablet. It's available on Casio's web site along with other additional information. The user's guide is very well written and thorough in covering all of the watch's 11 functionals. You shouldn't have any trouble comprehending it, but you do have to study it more thoroughly than just glancing through it and/or pushing buttons. If you are an aspiring trekker with little experience you should read up on weather forecasting using a barometer and wilderness navigation using a topo map and compass.

The sunrise and sunset times function is very handy if you're hunter or fisherman. For example, if a springtime turkey hunter, who wants to setup on a roosting gobbler an hour prior to the crack of dawn, will find this feature essential. A trout fisherman is always tuning into aquatic insect hatches occurring at dawn or sunset. I found the sunrise and sunset times to be accurate within a minute or two as long as I enter the approximate longitude and latitude of my present position.

Moving on to the more general and novel functions, I found the automatic calibration of PRW 3100's timekeeping function to be an amazing feature. I live in the Atlanta, Georgia area which is 1400 miles ESE from Fort Collins, Colorado where the Atomic time clock radio signal originates. Before going to bed I simply place my watch on the window sill facing WNW. Be sure there are no obstructions (buildings or geographical features) blocking the signal. Over the last month it's never failed to automatically calibrate the timekeeping function even in bad weather.

Another interesting feature of this watch is the solar charging function. The PRW 3100 arrived displaying the medium (M) charge level. It took only an hour of exposure to direct sun light for it to reach the High ("H") charge level. Every so often while getting my day started I'll place the PRW 3100 on a window sill facing the morning sun for about an hour. It has remained at the "H" level ever since I've have owned it. The morning sun exposure is cooler and sufficiently intense to quickly charge the watch.

If that doesn't tickle you're fancy, the watch actually goes to sleep when you go to sleep by engaging its power saving feature which kicks in when the room light is turned off and stays that way until day break.

If you're still not impressed, when darkness sets in after the sun sets, this watch automatically activates an LED light underneath the PRW 3100's STN LCD screen when you move your arm to the normal time reading position. The light stays on for about 1.5 seconds or 3.0 seconds whichever you prefer. I use it sparingly when practical to avoid unnecessary battery consumption, particularly in dim light conditions, when engaging in physical activities that require frequent or repeated arm motion.

Compared to other watches in its class I really like the watch's slim appearance, it's dimensions are very close to the majority of other standard watches. Its weight is noticeably greater than a standard watch but at 2.4 ounces, it's much lighter than other ABC watches. Don't worry, it will eventually become a part of you. The attached pictures below show two watches strapped onto my wrist. The watch behind the PRW 3100 is my $15.00 Casio W-214HC watch, is typical of many standard time pieces manufactured by Casio and carried by Walmart and Target. It weighs slightly more than an ounce. As one can see the PRW 3100's face and profile is only slightly bigger than the W-214HC. That's a big plus to me. I'm not a fan of big, heavy watches.

I can't say enough about how much I like the STN LCD display. It's incredibly clear and distinct to read at almost any angle, distance or daylight conditions. See the picture below showing the clock face. All things considered it's a very attractive, smart-looking watch, the information etched on the bezel and displayed on the STN LCD screen is intelligently laid out, necessary and straight forward. Once you become acclimated to the watch the small lettering used to show the watch's current status is appropriately sized so as to not clutter the important functional information displayed in larger characters. It's a very cool, no-nonsense, self-sufficient watch with automatic time calibration, power saving and solar charging functions.

The remaining, undiscussed functions [stop watch, time remaining count-down, alarms (5), world time] are complimentary and very convenient to utilize when when engaging in life's other routine activities.

Finally, based on personal experience I bought a Casio replacement band (UPC N0: 10500217) to use as a spare if needed. See the two pictures of the band attached below. After searching at length on the web, the only source I found carrying the band was an individual listing it on EBAY at a "sale" price of $35.99, marked down from his $39.99 listed retail price. It matches the original exactly. Happy to have it. BTW, the watch band material is specified as either "soft urethane" or "resin". If you're confused, you may find it helpful to know that urethane falls under the category of synthetic resins. So in this case they're one and the same.

Another point I'd like to make is that as the PRW 3100-1ADR and the PRW 3100-1JF are one-and-the-same watch in every detail. "ADR" watches are made for the Asian domestic market and sold by AreaTrend in the USA, "JF" watches are made for the Japan domestic market and are sold by Premium-Japan in the USA. That's the only difference. I bought mine from AreaTrend who performed flawlessly.

What I love most is the amazed reaction it draws when I tell people what PRW 3100 does. I recommend this watch most highly.
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