Produce your dry ice when it serves to you.
Dry Ice Box is small and light, and it can be easily used in every moment and every place: to the side of the bench or in an angle of the laboratory, in the corridor, etc. It produces dry ice from the liquid CO2 through the adiabatic expansion (Joule-Thompson effect). The liquid CO2, in which the pressure is greater of 60 kg/cm2, comes forced in the box where the pressure is equal to that atmospheric one. The liquid CO2 then vaporizes and expands. When the gas is expanded to the atmospheric pressure, the expansion box is cooled off and the gas comes out through external orifices. As a result the liquid CO2, in the box, changes to snow directly, and the solid dry ice accumulates in the box and comes compressed in a solid block.
Connect the extremity of the tube-siphon to the compressed CO2 tank, therefore open the valve of the tank for approximately 2 minutes. Check the pressure on the gauge and adjust the gas escape valve to maintain the needle under the limit of 6bars. When the gas begins to exit from the fissures of the apparatus, close the valve. Open the box loosening the lateral closings to extract the dry ice block.
No electricity needed.
In termo-coibentation atmosphere the dry ice can resist until 18-24 hours.