Waterproof watch information

Water resistance & manufacturer specifications

At FIX MY WATCH we provide waterproofing and water-resistance checks for all of our repairs and will always try to ensure it meets the manufacturer’s specifications.

A good point to note is that water-resistance of a watch as printed on the watch’s case is an original state, not a guarantee for lifetime as the water-resistance of a watch is determined by many factors including the condition of the case and other external parts.

“This watch is water resistant up to 30 meters.”

Anyone with experience of buying a watch has probably contemplated putting this statement to the test.

In fact, “Water resistant” might rank as one of the watch industries’ greatest myths. The question remains then, why do watches tell us that they are water resistant at all and what does it actually mean?

If a watch is designated as water resistant, it is humidity-protected and can endure splashes of water, perhaps from the rain or washing your hands. However, it is far less prepared for a trip alongside you in the shower, swimming pool and most certainly not the open ocean.

Today, standards for water resistance are provided by the International Organisation for Standardisation (ISO). One such standard – ISO 6425 – refers specifically to dive watches which you can read more about in our dive watch article on our blog, but we’ll instead focus on ISO 22810, the standard for everything else including popular fashion brands such as Gucci, Armani, Tissot and more. It specifies the test methods used to verify the water resistance of watches and moreover, indicates the marking which the manufacturer is authorised to apply to them.

But what about those specific meter references?

Surely they stand for something?

Contrary to popular belief, the specific metre references (such as ‘3 BAR / 3 ATM / 30m / 100ft) do not actually indicate the depth of water that watches are able to withstand and should not be taken literally. Instead, the depth warning refers to the amount of accidental splashes that watches can take, signifying the results of static pressure tests conducted under laboratory conditions.

Realistically, the bigger the resistance the more likely a watch would be to withstand greater periods of time submerged in water as well as higher levels of pressure. For example, your 100m water resistant watch could probably tackle water sports activities and swimming whereas your 30m resistant watch should not be forced to withstand more than a few accidental splashes.

In principle though, your 30m water resistant watch could even succeed during swims beyond depths of 30 metres. However, the varying success of watches under water relies on a large number of factors including lab-like conditions, short immersion periods and recently tightened gaskets and seals and while your nearby leisure centre might provide something close to the ideal environment, the open ocean most certainly doesn’t. No matter how impenetrable you think your watch is, water remains its kryptonite, its number one enemy and not something to be toyed with.

Water resistance guide

30M

3 ATM

50M

5 ATM

100M

10 ATM

200M

20 ATM

300M

30 ATM

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