Acrylic tubes fabricated into Martensil bottle

perspex pipe
Martensil bottles are a common laboratory equipment used primarily for cultivating microorganisms.
The working principle of a Martensian flask is to utilize the effect that the solubility of oxygen varies with temperature should.
6 inch acrylic tube,sealed acrylic tube bottom and its top.Drill two holes on the tope and install one valve on one hole.
4 inch acrylic tube stand in one rack (supported by 4 pieces of 25mm acrylic tube),sealed bottom and top,installed 5 valves on,one one top,another on bottom and other 3 on the acrylic tube body.The clear perspex tubing is connected by acrylic flanges.