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Myth Buster: the Water Resistance of Your Watch May Not Mean What You Think

by adminPosted on October 31, 2016November 10, 2020

Do you know what ‘water resistance’ really means? If your watch says it is water resistant to 100 metres, this means you can dive with it down to 100 metres, right? Wrong! Doing so will likely ruin your watch.

‘100 metres water resistant’ actually means your watch is resistant to 100 metres of static water pressure, not to a depth of 100 metres.

It’s important to also know that the actual water pressure on a watch during use is greater than the static pressure it has been tested at. For example, when diving into a pool, the pressure on the watch is greater at the impact point with the water. So, a good rule of thumb is to always err on the side of caution.

Here’s a guide to help explain:

Firstly, check the case or dial marking.

Not marked – a dress watch only.

Water resistant – will withstand accidental splashes and rain.

30m – suitable for everyday use. Will withstand accidental splashes, but not suitable for swimming.

50m – suitable for everyday use and swimming, but not poolside diving, snorkelling or water sports.

100m – suitable for everyday use, swimming and snorkelling. Not suitable for high board diving or underwater diving.

200m – suitable for high-impact water sports and scuba diving at depths not requiring oxygen.

300+ – suitable for all high impact water sports and scuba diving.

Please note, the above is only a guide. If you have any questions about the water resistance of your watch, please ask our team or a watchmaker.

Most water resistant watches are not designed for prolonged active use in the water, as certain chemicals in pool water can damage watch seals. Watches should be tested for water resistance every two years.

On another note…do you wear your watch in the shower?

Hot water and soap can affect the condition of your watch. Soap being acidic eats the seals, and hot water expands the seals. Always make a habit of taking your watch off before stepping in the shower to keep it in good condition.

Electric fences can interfere with the motion of watches, so if you are regularly wearing a watch down on the farm, consider a digital watch such as a ‘Mudman’ G-Shock watch, available in-store.

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