Estimating Temperature by Touch
I can touch a smooth metal surface at 50C forever, 60C for about 2
seconds, and can interpolate pretty well berween.
Confirmed.
50C is now the legislated limit for hot water systems as it will not scold.
60C maybe 5 secs max. depending on your level of tolerance to pain. It is
the legislated as the cut off point as well.
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