• Syphon barometers are the simplest of the mercury barometers.
  • This barometer has a thick-wall glass tube, closed at one end, open and turned upwards and widened to form a small reservoir.
  • For demonstration, mercury column is feasible.
  • When placed into the upright, “U”, position, mercury will flow away from the sealed end, forming a partial vacuum, until balanced by atmospheric pressure on the other end.
  • The scale is graduated in metric and English system.
  • Zero point adjustment is carried by a screw clamp attached to a glass tube.
  • The entire set up is fitted on a wooden polished base.
  • It is supplied without mercury.


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