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RE: CO2 Bubble Counter

A inexpensive DIY Co2 Bubble counter can be very easily made from
intravenous drip set which is used in the medical field(to give intravenous
saline/fluids). Such sets have a chamber in the midst of the tubing to count
the drops of fluid. This chamber is to be filled with any fluid to count the
CO2 bubbles. If a coloured fluid is filled in this chamber, that gives
additional effect.

Dr Athale,
Baroda, India.