Thursday, 8 March 2012

Casio SGW-300HB-3AVER thermometer, altimeter & barometer watch


This watch packs lots of interesting features as listed below:
Altimeter - A pressure sensor detects changes in the air pressure and converts the result into an altitude up to 10,000 m.
Thermometer - A sensor measures the ambient temperature around the watch and displays it in °C (-10°C /+60°C)
LED Light - A Light-emitting diode (LED) is used to illuminate the watch face.
5 Daily Alarms - The daily alarm reminds you about recurring events with an acoustic signal at the time you have set. You can also activate hourly time signals (each hour). This model has 5 independent alarms.
Barometer - A built-in pressure sensor measures barometric pressure, which is shown on the display.
Countdown Timer - A stopwatch that counts backwards: When 0 minutes, 0 seconds is reached, the timer emits a 10-second signal tone.
Low Temperature Resistant - The timekeeping module is designed for operation at very low temperatures. The value indicates the lowest temperature at which the module will operate.
Stopwatch - Accurate measurement of elapsed time with a touch of a button, 1/100th Sec stopwatch
Water Resistant - 100 Metre / 10 Bar, 10 Bar Water Resistant means that the module is also suitable for swimming or snorkelling
World Time - Displays the current time in major cities and specific areas around the world.

Unfortunately I have found the data from the Altimeter to be less than accurate for instance while standing on a bridge over a river which one mile downstream opens out into an estuary the watch shows  -120m above sea level, at my house where I know to be around 60m above sea level the watch reads 5m and today as I sit at my desk it reads  -45m which shows inconsistency in the readings. Unless my house is unknowingly sinking into the ground these readings are wrong. I have zeroed the watch while standing at sea level but this makes no difference to the accuracy of the readings. The thermometer seems to be reasonably accurate if you take readings without the watch being on your wrist and having been left to cool down for 20 – 30 min as described in the owner’s manual.  I have no way to test the accuracy of the barometer but I fear this setting may suffer from the same inaccuracy problems. The other settings such as the stopwatch and five individual alarms are easy to use. The display is clearly visible from all angles and in all light conditions even when using the LED light. To conclude this is a good watch if you need a waterproof watch that looks impressive but the poor accuracy and impracticality of having to remove the watch and wait up to 30 min for it to cool down before taking temperature readings makes this watch less than ideal for practical use out in the hills.


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