Metal Elctrodes on back of AW4 will be scratch magnets?

[richard371]

We know Sapphire and Ceramic doesn't scratch easy but something tells me the Electrodes on the back will be scratch magnets showing silver underneath where it gets scratched. Metal cashbacks do scratch based on all watches ive owned.

 

[canyonblue737]

almost certain the metal is still beneath the sapphire but transmits a current.

 

[richard371]

I'm not sure if all the metal sits beneath the sapphire. For ECG I thought you need metal to skin contact?
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Back Crystal Electrode. An ultrathin chromium silicon carbon nitride layer applied to the sapphire crystal reads the electrical heart impulses in your wrist.

 

[MadCar]

You aren’t going to see it does it matter? I’m not sure many have skin that is like sandpaper either, I’m sure it will be fine.

 

[BlueMoon63]

We know Sapphire and Ceramic doesn't scratch easy but something tells me the Electrodes on the back will be scratch magnets showing silver underneath where it gets scratched. Metal cashbacks do scratch based on all watches ive owned.

If you have metal skin I suppose.