@Ghost said in Suunto ZoneSense:
As far as I can remember, on my Vertical, when the optical heart rate is enabled and the watch loses the signal from the strap during an activity, it switches to the optical sensor.
No, it does not, unfortunately. I just double checked. Once you start an activity, there is no way to change sensors, HR or otherwise. I’ve had it happen a number of times where the battery on my external HR sensor dies or stops working for whatever reason. You’re then left with no HR data for the remainder of the activity. It definitely should fall back to the OHR, but doesn’t.
I tie this in with the general failing of how Suunto handles external sensors. Hopefully the ability to change sensors mid-activity will come along with the ability to have multiple sensors of the same type.