What is a Digital Tire Gauge?
A digital tire pressure gauge is a device used to measure the air pressure inside a tire. It has a digital interface (LCD screen) to display the air pressure and provides far greater accuracy than a traditional analog tire pressure gauge.
How is a Digital Tire Gauge Used?
A digital tire pressure gauge is used in the same way as a traditional gauge. The device is placed over the valve stem of the car tire and gentle pressure is applied to it. When it is fully seated over the valve stem, it shows the air pressure inside the tire.
How Does it Measure Tire Pressure?
When the device is pushed against the valve stem, the air inside the tire exerts pressure on it. This creates force that is measured by the device and translated into numeric reading that is displayed on the LCD screen.
How is it Powered?
It can be powered by anything from batteries to solar power to direct electricity. For the purpose of portability and convenience, a battery powered device is much more useful. You can keep it in your car trunk and use it in case of an emergency (always keep spare batteries!). Nowadays, you can even find solar powered pressure gauges, although they tend to be rare and are of not much use in cold weather conditions.
How Does it Differ From Traditional Pressure Gauges?
A traditional pressure gauge is analog in nature. Unlike the digital tire gauge, which measures the force exerted by the air inside the tire on it and converts it into a numerical value, a analog (traditional) pressure gauge has a numeric gauge built into it that is pushed out by the air inside the tire, causing the needle to move and indicate the air pressure.
Readings from a traditional pressure gauge vary a lot with a high error range. A digital tire gauge, on the other hand, has an error range of +-0.05 psi only, making it high accurate.
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Digital Tire Gauge
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