A data logger is an electronic device that can either have its own built-in sensors, or that can retrieve data from external sensors. In general, they’re small, battery-powered, and contain a microprocessor. They can be stand-alone devices, either with their own keyboards and displays, or that would hold data in memory for later retrieval via a normal computer. On computers, data may be either displayed by a proprietary program, or by Excel graph or spreadsheet. Newer models can also have wireless capabilities, enabling them to send a constant stream of data back to a base station.

Take a look on the web, and you’ll find a wide range of data loggers, from the very inexpensive to ones that cost thousands of dollars. You’ll find many different vendors, selling devices for just about any type of data that you can imagine.

Many vendors have prominent web-front stores, and sell a very large range of devices. There are devices for use by homeowners, electricians, weather researchers, network technicians, etc. It would seem that there’s something there for pretty much everyone.

Homeowners may be interested in purchasing an energy audit or monitoring device. Several types are available, including one that can measure the power draw of an electrical appliance, and automatically calculate its annual energy cost. There’s also a monitoring kit that enables you to constantly monitor room temperature throughout the house.

Logging devices for industrial or small business use include monitors for HVAC, greenhouses, refrigeration units, or air quality. Air quality monitors can keep a constant check on levels of atmospheric carbon dioxide, carbon monoxide, or other gasses. Use these in closed spaces, where there may be a danger that these gasses may accumulate.

Fleet operators, such as taxi cab or trucking companies, may benefit from the automotive logging devices. These are small devices, which can be connected to a vehicle’s OBD-II port. They can monitor engine performance, fuel economy, and how the vehicle is being driven. Some of these devices have wireless capabilities, allowing operators at a base station to see real-time data as vehicles are being driven. Auto mechanics can also make use of OBD-II devices when trying to diagnose engine problems.

For weather researchers, there are several types of monitoring solutions. Some are monitors for specific weather data, such as wind, temperature, humidity, soil moisture content, or rainfall. There are also complete weather monitoring stations, which can monitor multiple types of weather data.

Operators of mines or grain elevators, where combustible gas or dust may be a problem, would want to use an “intrinsically safe” monitoring device. These devices are guaranteed not to produce sparks that could cause an explosion.

When shopping for a monitoring solution, be aware of what’s included in your purchase. Oftentimes, the price of the data logger device doesn’t include the required sensors. So, you’ll need to purchase them separately.

Our qualified technicians have over 30 years of experience in providing instrument calibration services and full service repair. We provide a wide range innovative technical solutions, including data logger, humidity sensors, and pressure transducer.

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As children grow up they have to face quite a few disappointments in life. They learn that pixies, the tooth fairy, and that other guy in the red suit don’t exist. They discover that green vegetables are not merely a garnish; and they encounter the QWERTY keyboard.

The child puts in a great deal of effort going through the daily positive brainwashing process of learning the letters of the alphabet; a-for-apple, b-for-ball, c-for-cat… until finally all twenty-six are imprinted in his or her mind in the correct order and a world of reading and writing awaits. A lot of the latter part of this world will be explored using word processing packages such as Microsoft Word, and children these days are introduced to these programs at an early age.

The child’s first encounter with a computer, however, can be something of a shock. Setting eyes on the keyboard for the first time, the child is aghast to discover that none of the letters are in their correct places; it is as though someone has made a huge anagram of the alphabet, and everything the child has learned has flown out of the window. Gingerly the child sets about typing using this unusual new arrangement, with curled index finger and protruding tongue a typing speed of 3 – 5 words per minute is reached using the hunt and peck method. Of course, with practice the child can soon become proficient in using the keyboard, but why are the keys laid out in this alphabet soup fashion in the first place? The answer lies way back in the days of the very first typewriters.

In the late 1860s, an American inventor by the name of Christopher Scholes developed the first rudimentary typewriter with a group of associates. The keys on this early machine were originally laid out in alphabetical order, but this led to problems with the type bars jamming when typing at speed. To remedy this, Scholes relocated the keys with the aim of keeping the most frequently used letters apart, and the result is the QWERTY keyboard.

Not long after this, however, improvements in typewriter design put an end to the jamming problem, so technically the QWERTY system was no longer necessary, yet it has survived even into the computer age, where there are no type bars to jam.

It does have its rivals, however, the best known of which is the Dvorak Simplified Keyboard, which was patented by August Dvorak in Seattle in 1936. This layout was to challenge, but never conquer QWERTY, despite having several advantages over it, such as simplicity to learn, increased comfort when typing and favouring the right hand.

Although this layout bears no resemblance to the familiar QWERTY, it can be mastered in a short time, and it is worth pointing out that the world record for typing speed, held by the late Barbara Blackburn who reached a peak speed of a staggering 212 words per minute, was achieved using the Dvorak system. The Dvorak Simplified Keyboard is available on all major operating systems, but, despite well-founded claims of superiority in accuracy and ease of use it has failed to dislodge the stubborn QWERTY layout.

So, having survived for well over a hundred years, does the QWERTY layout on the modern computer keyboard have anything more to offer than that of early typewriters? Well, yes and no.

The keys are all in the same places, of course, but it takes far less effort to type than it did on a manual typewriter. But the real difference lies in the many symbols and special characters that can be inserted into documents using keyboard shortcuts that there would be simply no room for on a typewriter. Open Microsoft Word and check them out by clicking Insert/Symbol, and browse the many menus. You will see that there is a vast array of symbols and characters at your disposal, from the generally used arrows, ticks and foreign currency symbols, to fun ones that include a smiley face, skull and crossbones, yin and yang, and, for those festive letters, that guy in the red suit.

You can create your own keyboard shortcuts quite easily for these characters, which means that those you use regularly can be typed straight onto the page, adding impact to important documents, and fun to less formal ones. When you consider that some typewriters could only print an exclamation mark by typing apostrophe, back space, full stop, you can see how far we have come.

It is worth taking the time, perhaps through a training course, to explore the hidden world of Microsoft Word. There are many other features that this powerful tool has to offer.

About the Author

Rich Talbot