• Liquid carbon dioxide transition fluid
• Solid-state circuitry and simple push button operation as well as presets and internal controls, allows for precise and reproducible results.
• Accessories: 12 sample holder, each compartment measures 7.5mm dia and 6 mm in height, coverslip holder for 5x12mm diameter disks, coverslip holder for 16-22mm diameter disks, Teflon tissue baskets.

The forces resulting from surface tension during drying are enormous. For example, to pull a DNA molecule (2nm in diameter) out of water (which has a surface tension of 72 x10³ Nm^-1), the total forces from that tension acting on the DNA thread can be calculated to be 1.47x10⁸Nm^-2 which is 1.5 tons cm^-2!

Critical point drying reduces the exerted surface tension on the specimen to zero by utilizing an occurrence known as the continuity of state for which there is no apparent difference between the liquid and gas state of a medium i.e. when the surface tension between this interface is zero. This occurs at a specific temperature and pressure with resulting density, and is known as the Critical Point. This condition of zero surface tension can be used to dry Biological and materials specimens, avoiding the damaging effects of surface tension. The Tousimis Samdri®-795 is a semi-automatic critical point dryer with a chamber diameter of 3.2 cm and depth of 3.2 cm which capable of accommodating samples of various sizes with the accessories provided.