No idea. Sounds awesome. Might be a higher quality probe, or one designed with low drift rate in mind, given its marketed as an industrial probe. That length doesn't specify how much drift is expected, so it's unclear what tolerances that has in mind.

Ahh, it’s the tolerance details that I was missing. Thanks for the insight.

It may be suspended in water indefinitely, but the rated lifespan is four years. Hmmm..