High quality Stainless steel 3 in 1 thermometer hygrometer barometer clock

The barometer back a hanging wall hole, hit a nail on the wall the barometer hang up on that. But don't hang high, to facilitate reading and setting contrast injection.

On the barometer, high pressure and low pressure is relative, no clear boundaries. However, we can based on 1000 hpa, for the low pressure area to the left, to the right is high.

Using the adjustable pointer on the barometer lens can simply mark the time of the atmospheric pressure and observe the change of the atmospheric pressure, are you reading at least once a day, and record the frequency of the pressure change, many times a day reading can get accurate weather forecasts. Although the actual factors that affect the weather a lot of, such as geographical location, temperature, humidity, wind and seasons, but by observing the change of atmospheric pressure can let you do the weather report.

Atmospheric pressure can reflect said the air density on the level of different heights of the earth's surface, according to the value of air density area is divided into low pressure and high pressure, like water diffuses from a liquid, air is from high to low pressure area, low pressure area have a large amount of water vapor and guide to the cloud or rain, so, the weather is bad because of the depression, on the contrary is due to the high pressure of the weather getting better.