Turns out the sensor works OK at low temperatures. Lasers actually work better. The only issue is we didn't test down that low for accuracy.
I can't think of a reason it shouldn't work. Do check the accuracy.
The only possible failure mode would be the glue that holds the structure together.
After many repeated excursions, the case might develop cracks in the glue.
Might want to deep freeze a few of them repeatedly and convince yourself this is not going to be an issue.
We simply assumed that no one would be using their cell-phone at 20 below.
And even if they did, the cellphone actually provides a lot of heat.
So if you are willing to do the testing for accuracy down that low, go for it.
But the testing is on you - you are going outside the bounds of our datasheet.
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