What does 3 atm 5 atm 10 atm 20 atm mean?

Meaning of 3 ATM 5 ATM 10 ATM 20 ATM in water resistant watch Water resistance levels for smart watches are specified from 3 ATM to 20 ATM. The watches of divers are manufactured which can work beyond 200 meters depth.

What is the meaning of 20 atm on a watch case?

It refers to the water resistance of the case. 20 ATM refers to the watch being able to withstand the pressure of ‘20 Atmospheres’ or 20-times the normal air pressure at sea level. When submerging underwater, the water pressure increases and equivalent of 1 atmosphere roughly every 10 meters deep you go.

Can you go swimming at 20 meter ATM?

For instance, let’s take the case of a 20 meter ATM rating. Usually, this resistance is referenced to a stationary point which means it doesn’t take into account motions at that depth so it might not be a good idea to go swimming at the rated ATM depth as this could break the seal since movement generates increased pressure.

What is the meaning of 20 atm water resistance?

Resistant means that they have made some attempt to block water but its not guaranteed… usually they used an o-ring and sealing groove rated for 300 PSI and prototype testing but did no individual unit testing on every watch. You should probably not expect a watch or instrument called 20 ATM water resistance to survive extended stays at that depth!