On a refrigerated truck, what is the "tape" called that keeps a log of the temperature within?

I could not find any reference to such a named system. It seems that refrigerated trucks are switching over to wireless monitoring and logging systems nowadays anyway.

@marinelife that very well could be…the woman I interviewed had been at the place for decades so she may be behind in the times.

Is it possible she said cryon tape? Cryogenics refers to keeping things frozen, though usually to bring them back to life.

@filmfann nice try! – google shows nothing for it (except for “crayon” tape)

This is a general reference to what she might be specifically talking about.

Take a look at this around page 13–14 for some examples for cargo containers.

Here’s an example for trucks.

Try googling time-temperature indicating device and go from there. I also checked out refrigerated transport with it and some variations of that. You might find something if you search for the FDA or USDA regulations that require monitoring or reporting.

It’s either the individual tracking tags that change color if they go over a certain temp or a specific brand of tracking/monitoring system that she’s referring to.