The Digital Altimeter Watch

Atmospheric pressure (or air pressure) is the pressure exerted by air in the atmosphere, and may change due to weather conditions. Barometers are the devices used to measure this metric and are commonly used by meteorologists to make weather predictions. An altimeter works like a barometer but uses the changes in air pressure to determine your elevation or altitude. In other words, it tells you how high you are. A digital watch that displays this information uses electronic or digital numbers to display its readings while an analog version uses a needle indicator. This tool can be very useful for mountain climbers, hikers and even skydivers.

If you are hiking up or down a mountain, readings of how high you are will change accordingly. In addition, weather conditions can also affect the readings. It’s important to realize that changes in the weather can either increase or decrease air pressure. When air pressure falls, you will get higher altitude readings, but when it rises you get lower readings. Because of this, it’s important to calibrate your altimeter frequently to make sure you get the most accurate readings possible. You can get the known value to use for calibration from multiple sources including topographical maps. Calibration may be necessary several times in a day, depending on the weather.

Digital watches that measure atmospheric pressure are generally designed to calculate how high you are at a given point or within a certain range. The type of watch and range you choose depends mostly on how much you can afford, how much you are willing to spend and your specific needs.

You can get an altitude measuring timepiece that automatically calibrates itself when the weather changes. You can also get one that uses GPS (Global Positioning System) data to determine air pressure. With a GPS enabled model you may not need to worry about recalibrating it for use. However, GPS equipped models usually do cost more.

Some common versions of these truly useful tools include brands from Casio and Timex and other major brands you’re probably familiar with. Apart from the altitude measuring feature, many models have other common features such as barometers, compasses, and thermometers. Many makes and models are also water resistant. You can also get digital altimeter watches from these brands that can keep track of your ascents and descents too.

By checking out several different brands of altimeter watches you are sure to find one that meets your needs and your budget. Aside from your sleeping bag and tent, the digital altimeter watch will easily become one of the most used pieces of equipment in your backpack.