4-2
Cryogenic Storage Vessel
Thermo Scientific
Section 4
Operation
1. Use a wooden yardstick or optional dip measurer (part #180143) to
measure liquid nitrogen level. NEVER use a hollow tube or plastic
dipstick to measure the liquid nitrogen level.
2. Level will be indicated by the frostline which develops when dipstick is
removed.
3. Level Monitor can be used for constant measurements. See Section 6.
1. Remove the 2 bottom-most cryoboxes from each rack.
2. Measure the height of 2 cryoboxes stacked on top of each other.
3. Fill vessel with liquid nitrogen to the height obtained from Step 2,
using a yardstick to measure liquid level in vessel.
4. Place racks into vessel without the 2 bottom-most cryoboxes. Samples
are now above the liquid nitrogen and are stored in the vapor phase.
Important
A level monitor should always be used when you store your
samples in the vapor phase because of the already low levels of liquid
nitrogen. Refer to Section 5 for correct level monitor for your system.
s
Wipe exterior surfaces with lightly dampened cloth containing mild soap
solution.
Storing Samples in
Vapor Phase
General Cleaning
Instructions
Measuring Liquid
Nitrogen Quantity
