The THERMO 7403 is a piece of laboratory equipment designed for the cryogenic storage of biological samples. More specifically, it is a liquid nitrogen storage system — sometimes referred to as a cryogenic freezer or LN2 storage tank — used to preserve biological material such as cell cultures, vials, and other sensitive specimens at ultra-low temperatures. Thermo Scientific is a well-established name in laboratory and life sciences equipment, supplying instruments, storage solutions, and consumables to research, clinical, and industrial laboratories worldwide. Their CryoPlus series is designed to combine the reliability of liquid nitrogen storage with microprocessor-based temperature management.
This unit offers substantial interior storage capacity, with an internal diameter of 600 mm and an internal height of 860 mm, accommodating up to 39,000 standard 2.0 mL vials, or between 8,450 and 65,910 Thermo Scientific Nunc Cryobank vials depending on configuration. These figures make it suited to laboratories requiring high-density, long-term cryogenic preservation.
The system operates on 200–230 V at 50/60 Hz, making it compatible with standard European electrical supply. External dimensions measure 970 × 730 mm with a height of 1,060 mm, giving a compact footprint relative to its internal capacity. The unit is offered in used condition, located in France, and was last in operation in 2020.
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