if you remove the watch from your wrist the HR sensor will disable itself automatically
Excellent. Thank you for that information.
How does the watch then "know" whether it is on my wrist or not? Is that to do with movement sensing maybe?
My guess is that if it does not detect a pulse it assumes that you either don't wear it or are death :p
If it assumed you were dead, what would make it register pulse again?
I just picked my watch up and turned it over and it started the HR sensors. So I guess it is movement based.