WHICH GUARANTEES THE WATER-RESISTANCE OF A WATCH?
The ISO-2281 standard, introduced in 1990, specifies the criteria for determining water-resistance and the tests to which a watch is subjected in order to be able to display the words "water-resistant watch" or "waterproof watch". These tests verify the resistance of the watch after assembly based on pressure, immersion time and temperature criteria. They consist, for example, of one hour's immersion in 10 cm of water at a temperature of 18°C to 25°C, short immersions in water at different temperatures, exposure to overpressure of water and then air, etc. To be able to display the indication "water-resistant watch" or "water-resistant watch", the watch must show no sign of water penetration or condensation inside the glass after each of these tests.
As mentioned above, water-resistance can be expressed in different ways: atm, bar or meters. When the water-resistance of a watch is specified in the form of a depth: "water-resistant 30m", "water-resistant 50m", "water-resistant 100m", this does not correspond to a depth at which you can take it underwater!
Indeed, to the static pressure exerted by the water at a certain depth is added the dynamic pressure created by your movement and that of your wrist under water. To sum up, a watch marked "water-resistant 30m" means that your watch can withstand the pressure exerted by water at a depth of 30 metres.
As you have understood, the water-resistance of a watch depends on many criteria that watch brands must apply to certify that it is "water-resistant". Pierre Lannier, which has always been committed to making quality watches and satisfying the greatest number of people, offers watches whose water-resistance allows you to swim and bathe with your watch, always at affordable prices.
GUARANTEED WATERPROOF ARTICLE