Programmable device for cryo preservation consisting of:
(1) Cryo Controller
(2) Actuator
(3) Dewar vessel containing LN2
(4) Handling box
(5) Welding apparatus to close the straws
Open-vessel system
* Self-seeding
* Temperature measured in reference straw
* Economical consumption of liquid nitrogen
* Autocalibration of temperature sensor
* Documentation of freezing process via PC