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How to charge a vapor/dry shipper with liquid nitrogen.

We frequently get asked this question, “Once I have a vapor/dry shipper, how do I get it filled?” The answer is simple, just rent one from CRYOCCESSORIES.com and you can request it be charged already when you receive it. The specific vapor/dry shipper we rent on our website is the MVE SC 4/2. The 4 means 4 liters of liquid nitrogen being used and the 2 means 2 weeks static hold time (technically 13 days). That means it is cold enough for your cryobiological material to stay frozen up to 13 days after its charged*. Once we get the order, we will ship it the same day it’s fully charged to make sure you have the most days possible with your charged dry/vapor shipper. Let’s get back on track with the topic of how to charge a vapor/dry shipper. If you choose not to have it already charged with us, you will need a liquid nitrogen supplier. This liquid nitrogen supplier can be anyone from AirGas to your local welding shop. Simply request them to remove the neck cork and fill the shipper to the bottom of the neck opening with liquid nitrogen. Once it is filled to the bottom of the neck opening, replace the neck cork/cover and allow the shipper to sit for 2 hours, this is the cooling off stage. It will still have liquid nitrogen in the bottom of the shipper after the 2 hours, make sure this excess liquid nitrogen is poured out before transporting the shipper. Our MVE SC 4/2 has QWick™ Technology built into the dewar. QWick™ Technology works as long as the shipper stays charged (cooled below -150 celcius), so to recharge it for another 13 days, all you have to do is add liquid nitrogen to the already cooled shipper, and wait for it to stop “boiling”. Once it stops boiling, it is recharged. Remember to always dump the excess liquid nitrogen out as vapor/dry shippers are only allowed exemptions with shipping carriers if no liquid nitrogen is present. If you need a vapor/dry shipper to keep cryobiological material frozen for longer than 8-10 days, then make sure to recharge the shipper to get up to another 13 days out of the charge. Contact us with any questions regarding the vapor/dry shippers!.

*Shipping the dewar in any other position other than upright could reduce the holding time to less than 10% of normal hold time. DO NOT SHIP UNIT ON ITS SIDE OR UPSIDE DOWN.

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