How to Build a Barometer

28/08/2015 22:25

This article will not be able to show you how to make an Industrial or scientific barometer which will show the most accurate results. This is a simple way to create a home barometer which will give you a general idea about the local air pressure.

 
 
 

Steps

  1. Build a Barometer Step 1.jpg
    1
    Take a wide-mouthed glass bottle or jar. For this project, usually a bottle mouth having a diameter of 1.5 - 2 inches is preferable.
     
     
     
  2. Build a Barometer Step 2.jpg
    2
    Take a rubber balloon and cut out the any hard areas (the hard area where you blow through).
     
  3. Build a Barometer Step 3.jpg
    3
    Cut the rubber balloon through the middle until you get a totally flat piece of rubber.
     
  4. Build a Barometer Step 4.jpg
    4
    Stretch the rubber balloon and fit it onto the wide-mouthed bottle or jar such that there are no areas of contour on the rubber surface.
     
  5. Build a Barometer Step 5.jpg
    5
    Holding the rubber piece tightly, secure the ends with a rubber band such that the rubber balloon does not slip off when you release the hold.
     
  6. Build a Barometer Step 6.jpg
    6
    Now, take that light stick or straw and cut-off a section almost a foot in length. (Straw is more preferable)
     
  7. Build a Barometer Step 7.jpg
    7
    Now stick the straw on the rubber balloon horizontally with rubber solution or glue such that the straw reaches up to the center point of the rubber and the maximum part of the straw is hanging outside the borders of the bottle mouth.
     
  8. Build a Barometer Step 8.jpg
    8
    Get the cardboard and cut out a 1 inch by 4 inch section and hold it such it height is the longer side and the shorter side is the width.
     
  9. Build a Barometer Step 9.jpg
    9
    In the middle, mark "calm weather", below it, "windy" and again below, "storm possibility" with each marking having 1 cm of gap between them.Above "calm weather", mark "humid" ".
     
  10. Build a Barometer Step 10.jpg
    10
    During the daytime, place the bottle on a place free from public disturbance.
     
  11. Build a Barometer Step 11.jpg
    11
    Stick the cardboard on the strong stick, fix it vertically a foot away from the bottle and adjust it such that, when the straw stuck on the bottle is perfectly horizontal, it coincides with the "calm weather" mark on the cardboard.
     
     
     
 

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Tips

  • Rubber solution instead of paper glue is recommended because rubber solution bonds with the rubber surface and you get a very strong and waterproof fix.
  • The straw must be stuck horizontally on the rubber surface such that one of its ends reach the middle of the circular mouth of the bottle sealed with rubber and the major part is hanging out.
  • Use sticks which are very light (drinking straws are perfect for this project) so that the weight of the stick does not cause the rubber to stretch.
  • The rubber bands must be tightened so that the rubber does not fly off. (Use more than one rubber bands if desired).
 
 
 

Warnings

  • The glass bottle must not have a narrow mouth for it to work correctly.
  • Do NOT swallow the rubber solution and smear it on your fingers, seek parental guidance when handling rubber solution. Use a stick to apply the rubber solution. It is poisonous and can be fatal.
 

Things You'll Need

  • A wide mouthed glass bottle or jar
  • A rubber balloon
  • Some rubber bands
  • drinking straw or a light stick having about 5mm of diameter
  • Cardboard
  • Pens
  • Some strong paper glue or rubber solution
  • A strong stick to hold the cardboard in plac

 

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