手表的防水性能主要依靠表镜、后盖、表冠等处的防水胶圈，并采用螺旋式表冠，从而达到相应的防水标准。手表的防水性能通常按其等级分为：不防水(表后盖勿标识)、防汗(sweat-resistant)、一般性防水(water-resistant)、30米防水(30m、3atm、3bar)、50米防水(50m、5atm、5bar)、潜水表100米防水，200米防水，300米防水等。
关于手表的防水性能，国家标准和国际标准都有明确的规定：凡是标明防水的手表，最低要耐受2个大气压，即20米水深处不进水。30米防水表示手表可以耐受 3个大气压，依此类推。此标准的前提是在进行测试的时候是在实验室条件下：温度保持在20-25摄氏度，且手表和水都呈静止状态。在这种情况下手表如果能够防水，即是合格的。
有些人认为我的手表防水可以达到100米甚至300米之多，所以就戴着自己的爱表去洗澡去桑拿。其实这样的做法是完全错误的，因为手表本身并不是一个绝对密封的壳子，也就是说防水不一定防水蒸气，我们都知道水蒸气是混合在空气中的，之所以能飘在空气里是因为水蒸气的分子结构非常小。而手表的密封是靠防水橡圈赌注底盖和表壳之间的缝隙，如温差变化大时大气压力会把带有大量水气的空气挤入手表中，并且水还会老化橡胶，使其性能下降从而失去防水功能。
再说说如果手表进水会对手表带来哪些伤害。首先大家都知道石英表和电子表是由电阻电容和电池等元器件组成，水本身是良导体，电子会在水中“流动”进水量大的话短期内会烧毁石英基板，进水量少的话短期内可能不会有问题，但是长期下来水会腐蚀电路板造成永久性伤害。机械表进水会氧化游丝齿轮等其它部件，造成精度下降甚至无法使用。
温差过大如蒸气房内，会使手表部件变型，阻容器件改变电器性。从而造成手表停走或精度下降。
从上述可以看出无论你的表有怎样高的工艺和怎样强的防水标准，都不要去尝试洗澡(冷水澡除外)或桑拿。
ps.如果你的表已经进水，请用最短时间将表送修。
防水标准：
30米：日常生活防水，防水溅。可以戴着洗手、洗脸。
50米：日常生活防水加强性，可以用少量的冷水去冲洗，不能浸泡在水中。
100米：潜浮标准，可以在泳池或者海水表面使用。
200米以上：潜水表，可以在戴水下呼吸器具的深度使用(要根据潜水深度来选择配戴手表的防水标准)
the waterproof performance of the watch mainly depends on the mirror, back cover, crown and other places of waterproof rubber ring, and the use of spiral crown, so as to achieve the corresponding waterproof standards. the waterproof performance of the watch is usually divided according to its grade: not waterproof (table cover does not identify), anti-perspiration (sweat-resistant), general waterproof (water-resistant), 30 m waterproof (30m, 3atm, 3bar), 50 meters waterproof (50m, 5atm, 5bar), diving table 100 meters waterproof, 200 meters waterproof, 300 meters waterproof and so on.
with regard to the waterproof performance of watches, national standards and international standards have clear provisions: all marked waterproof watches, the minimum to tolerate 2 atmospheric pressure, that is, 20 meters of water depth is not in. 30 m waterproof indicates that the watch can withstand 3 atmospheric pressure, and so on. the premise of this standard is that the test is carried out under laboratory conditions: the temperature remains at 20-25 degrees celsius, and the watch and water are stationary. in this case, if the watch can be waterproof, it is qualified.
some people think my watch is waterproof enough to reach 100 meters or even 300 meters, so i wear my own love watch to bathe in the sauna. in fact, this approach is completely wrong, because the watch itself is not an absolutely sealed shell, that is to say, waterproof does not necessarily prevent water vapor, we all know that water vapor is mixed in the air, the reason why can float in the air because the molecular structure of water vapor is very small. the seal of the watch is the gap between the bottom cover and the case of the waterproof oak, such as when the temperature difference changes greatly, the atmospheric pressure will squeeze the air with a lot of water and gas into the watch,and the water will also aging rubber, so that its performance is reduced and thus lost waterproof function. besides, what damage will be done to the watch if the watch comes into the water. first of all, we all know that quartz watches and electronic watches are composed of resistance capacitors and batteries and other components, water itself is a conductor, the electron will flow in the water in the short term will burn quartz substrates, less water intake may not be a problem in the short term, but long-term water will corrode the circuit board caused permanent damage. mechanical meter inlet will oxidize other parts such as filament gears, resulting in reduced accuracy or even unusable.
the temperature difference is too large, such as in the steam room, will make the watch parts variant, block the container parts to change the electrical nature. this causes the watch to stop or the accuracy to drop.
from the above, it can be seen that no matter how high the craft of your watch and how strong the waterproof standard, do not try to bathe (except cold showers) or sauna.
ps. if your watch is already in the water, please take the table to repair it in the shortest possible time.
waterproof standard:
30 m: daily life waterproof, waterproof splash. you can wear a hand and wash your face.
50 m: daily life waterproof reinforcement, can be rinsed with a small amount of cold water, cannot be soaked in water.
100 m: snorkeling standard, can be used in the swimming pool or seawater surface.
more than 200 m: diving table, can be used in the depth of wearing underwater breathing apparatus (according to the depth of diving to choose the waterproof standard of wearing watches)
劳力士保修期内修理费
维修中心地址:上海市静安区南京西路梅龙镇广场12楼 品牌简介 劳力士（rolex）是瑞士的手表制造商，前身为wilsdorf and davis（w&d）公司，由德国人汉斯·威斯多夫（hans wilsdof）与英国人戴维斯（alfred davis）于1905年在伦敦合伙经营。1908 年由汉斯·威斯多夫在瑞士的拉夏德芬（la chaux-de-fonds）注册更名为rolex。劳力士以庄重、实用、不显浮华的风格广受成功人士喜爱，其表款高度精准且具备超高的耐用度，在钟表圈中，劳 力士的爱好者们常常会用一句话来形容劳力士：一“劳”永逸。
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