Waterproof watches, as the name suggests, refer to watches with waterproof function. Waterproof watches are divided into ordinary waterproof and professional waterproof. Ordinary waterproof watches can only prevent water splash, and professional waterproof watches can be soaked in different depth of water. So what does it mean by watch 100 meters in waterproof?
Waterproof level 1: Waterproofing is 30 meters/100 feet or waterproofing is 50 meters/165 feet, which can only prevent splashed water droplets and rain.
Waterproof level 2: Waterproofing is 100 meters/330 feet or waterproofing is 200 meters or 660 feet, which can prevent splashed water droplets and rainwater and can be worn for diving swimming.
Waterproof level 3: waterproof is 300 meters/1000 feet. You can wear free diving or water exercise.
Regarding the waterproof performance of the watch, the national standards and international standards have clear stipulation: Watchs that indicate waterproof should tolerate 2 atmospheric pressure at the lowest, that is, the depth of 20 meters of water does not enter the water. 30 meters of waterproof indicating that the watch can tolerate 3 atmospheric pressure, which is pushed according to this.
The premise of this standard is that when testing, it is under laboratory conditions: the temperature remains at 20-25 degrees Celsius, and the watches and water are static. In this case, if the watch can be waterproof, it is qualified.
