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Air pressure pushes down on the open side of the barometer tube onto the surface of the red fluid. The gas in the barometer will be compressed and you will notice the red fluid level in the right hand portion of the barometer tube falling. High pressure or increasing pressure indicates fair or improving weather
Low Pressure or Decreasing Pressure:
When the air pressure decreases on the surface of the red fluid, the gas in the barometer will expand and the red fluid will rise in the right-hand portion of the barometer tube. Low pressure or decreasing pressure indicates foul weather or deteriorating weather conditions
A very important factor in measuring air pressure is the temperature. High temperatures will cause fluids and gases to expand causing an error in the readout of the barometer scale. The Eco-celli has solved that problem. On the right side of the Eco-celli is mounted a high precision thermometer parallel to the barometer tube. This thermometer has the same thermal expansion/compression rate as the barometer. With the help of a movable scale attached to both the barometer and thermometer tubes, you set the scale to the actual temperature (top of blue fluid level). The error caused by the temperature is automatically corrected and you can now read the correct air pressure. On the barometer scale, there is a slider. This is the tendency pointer. As you read the air pressure (top of red fluid) place the slider at that point. When air pressure fluctuations occur, the red fluid level will differ from the last position of your pointer. The difference is the indication of the coming weather. The amount and speed of the changes in air pressure give a good indication of when to expect weather changes. The weather forecast distributed on television and radio are only for a broad area and do not take into account factors such as forests, lakes, rivers, etc. These effects in meteorology are called “ the micro-climate”. With the help of your Eco-celli barometer, you will be able to make forecasts for your own “micro-climate” for a time interval of 6 to 12 hours in advance.
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