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Product Name: Aneroid barometer
Model No.:B9392
Measure Range:950~1070hPa Accuracy: +/-5hPa,
Unit Size: approx Ø13x TH4.3CM
Weight:approx 0.13KG
Package: white box

Atmospheric pressure and the Weather, air pressure indicates the density of the layer of air that surround the earth and is generally divided into low air pressure and high air pressure according to the degree of density. Furthermore similar to water flowing from a high place to a low place, air flows from high air pressure areas to low air pressure areas.

High air pressure and low air pressure are relative terms in hector-Pascal there is no distinct point which defines what is a low or high pressure area, however we will suppose that passing to the right of 1000hPa is high air pressure zone and passing to left of 1000hPa is low air pressure zone

Low air pressure areas have comparatively large water vapor and this leads to clouds and rain.
Consequently the weather deteriorates with the coming of low air pressure and conversely improves with the coming of high air pressure.