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c/coldchain·posted 2 years ago by u/gustav_vermeulen

[Discussion] the data logger advice in here is 6 years out of date

Discussion

Right, the ice pack question again, but with numbers this time.

I have 5 data points over 38 weeks. The pattern is consistent enough that I do not think it is chance, and boring enough that nobody is going to screenshot it, which is usually a good sign.

The thing I would flag for anyone new: the effect I am describing showed up at week 73, not week 27. People give up long before the interesting part.

Interested in whether this matches other people's logs or whether I am an outlier.

375 up / 422 down47% upvoted9 commentsid u08e4124 Jun 2024

9 comments

9 in this archive, depth 4

best — the order this archive was captured in

u/honest_syringe3311 points·2 years ago

Do you have the logger trace?

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u/search_before_post5 points·2 years ago

time-at-temperature integral is the dose, not just peak temperature

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u/nils_ferreira2 points·2 years ago

time-at-temperature integral is the dose, not just peak temperature

Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.

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[deleted]3 points·2 years ago

[deleted]

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u/marta_ilunga1 point·2 years ago·edited

Yeah, data logger is the only acceptable proof.

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u/salma_vasquez1 point·2 years ago

lyophilised powder is far more forgiving than reconstituted solution

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u/ms_fragmenter9 points·2 years ago

Reconstituted or dry powder?

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u/low_appetite_lisa5 points·2 years ago

the logger trace is the data that matters, not the packaging promises

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u/cesar_teixeira1 point·2 years ago

gel packs last 18 hours, after that you are relying on the box itself

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Temperature and stability in the real world: what an excursion actually costs you, why lyophilised powder is far more forgiving than reconstituted solution, how to read a logger CSV, and how to photograph a failed shipment so the conversation with the vendor is short.

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