What does it mean when the watch is 30m life waterproof?

30-meter water resistance means that the watch can withstand 3 pcsAtmospheric pressure(3atm), however, even under the waterproof conditions of 3ATM, 5ATM, and 10ATM, there are times when water and fog can get into the water.

The water resistance of 30 meters is waterproof for daily life, such as sweat, rain or water droplets when washing your face, etc., and is not suitable for bathing, swimming, diving, etc.

In a general watch, the water resistance level is generally 30 meters (3atm) and 50 meters (5atm) water resistance; Only Rolex.

of the Submariners, Panerai.

Professional diver's watches, such as OMEGA's Seamaster collection, are only water-resistant to 100 meters or more.

Precautions. Generally, the waterproof standards of watches are divided into: 30 meters, 50 meters, 100 meters, 300 meters, and 500 meters. The depth of water resistance does not refer to the depth in the water, but the pressure.

Waterproof watches are divided into ordinary waterproof and professional waterproof. A normal waterproof watch can only protect against water splashes, while a professionally waterproof watch can withstand soaking in water at different depths. The waterproof of the watch depends on the waterproof rubber ring on the glass, back cover, handle, etc. to meet the corresponding standards.

All water-resistant watches are stamped on the case back"waterresistant"or"water proof"English letters. Watches without waterproof markings are only dustproof and should be protected from water.

The 30-metre (3atm, or 3 atm) water-resistant watch can be used for daily grooming or rain, i.e. water droplets are splashed on the surface without any water pressure being applied to the watch. The 50-meter water resistance is suitable for swimming and general household chores, and the 100-meter water resistance can be used for underwater work such as swimming and diving.

The above content reference: Encyclopedia - waterproof watch.

Generally, people who come into contact with watches for the first time, 30 meters of life waterproof will think that 30 meters vertically, in fact, it refers to the normal light rain and shallow water, washing and splashing water are not affected by the performance of the watch, and it is not allowed to play, take a bath, or contact hot water. Regarding the watch, it is recommended to buy 100m life waterproof, some time ago, I bought a 100 under the Swiss Army Knife.

30m water resistance refers to the pressure under static conditions under standard atmospheric pressure, not to say that it can protect against water at a depth of 30m.

The most basic thing about the watch is that it has a waterproof function, and there is usually a writing on the back.

30m, 3bar, 3atm, 50m, 5atm, 5bar: It means that life is waterproof, such as rain, it is okay to wash your hands and face, but it is not okay to swim and dive.

100m: Not only can life waterproof, but also swimming.

200m: It's very powerful with this sign, you can dive.

Precautions: It should be noted that watches are all hot water and water vapor, and the instructions will be written.

The difference is in how much water pressure it can resist.

300m: Swimming is possible, but only for shallow swimming.

All watches marked as waterproof must withstand a minimum of 2 atmospheres, that is, no water at a depth of 20 meters, 30 meters of water resistance means that the watch can withstand 3 atmospheres, and so on. The premise of this standard is that the test is carried out under laboratory conditions, the temperature is maintained at 20-25 degrees Celsius, and both the watch and the water are stationary. In this case, the watch is waterproof, that is, it is qualified.

The waterproof depth indicated on the watch or on the manual is the theoretical waterproof depth, that is to say, the data of the waterproof depth is the standard tested by the instrument in the laboratory, and there will be a certain difference between it and the actual life wear. Waterproof is water pressure resistance, and the water pressure vertical data obtained by the laboratory is static pressure, that is, it does not change.

1. The watch life waterproof 30 meters refers to the fact that it is suitable for daily use and can prevent the splashing of domestic water, but it cannot be soaked in water for a long time, and 30 meters does not refer to the depth of water, but pressure. At the same time, the watch should not be soaked in hot water, otherwise it is easy to cause the watch to malfunction and cause damage.

2. Watches with different degrees of waterproofness will be marked with corresponding signs, if the watch is waterproof for 30 meters, it means that this kind of watch can be waterproof daily, which can prevent a small amount of hand washing, washing the face and water in, and can also be used normally on rainy days, but can not be soaked in water for a long time.

3. The waterproof 30 meters marked above does not refer to the water that can prevent 30m water depth, but refers to the degree of water pressure under the action of standard atmospheric pressure, usually the waterproof level of the watch is mainly 30 meters, 50 meters, 100 meters, 200 meters, of which 30 and 50 meters are waterproof on behalf of life.

4. At the same time, the waterproof of the watch is under the condition of room temperature, if the watch is placed in hot water, or the temperature changes greatly in the environment, this will affect the normal waterproof function of the watch, and it is easy to rust or malfunction for a long time, which will affect the service life of the watch.