Water Resistance

Water resistance of watches

Watches that are made for regular use, are not meant for swimming, mechanical as well as electronic works have important parts that can rust, rust damage is normally seen on the case opening for the crown.

If a watchcase wears a indication on the back plate that it is waterproof in a certain way, it means that the case is made waterproof with facilities that protect the watch against moist from getting in. With these kind of watches the glass has been pressed in with a kind of plastic gasget, the back plate and eventual loose glass-edges are provided with a seal. Just like the crown and other buttons, these buttons are placed on a rod that runs through a tube that sticks out of the watch. On some models this gasget is placed on the inside where the tube goes into the casing.

Temperature differences is a traitores factor that causes leaks on waterproof watches, a watertight casing that normally allows you to swim with it can get filled with water when the user takes it along on holiday and takes it for a swim.  When you take a shower with the watch, the water is the same temperature as the watch, but when it has been worn in the hot son the temperature can rise up to 40 or 50 degrees Celsius inside the case. When it comes in contact with water that has a temperature of 20 to 25 degrees Celsius, the casing gets a blow from the large temperature difference. A casing that not has been created for these conditions can show leakage and allow water to get in the casing.

In practice we work with the following:
• 3 Atm. / 30 meters (also water resistant / water sealed): These watches are water resistant to rain and mud.
• 5 Atm. / 50 gauge (also waterproof): These watches are suitable for them to shower or swim, provided no large temperature differences. However, they are unsuitable for snorkeling and scuba diving.
• 10 Atm. / 100 meters (or waterproof): These watches are suitable for most kinds of water sports such as swimming, sailing and snorkeling in shallow water. They are inappropriate for tower jumping or scuba diving. Attention should be large temperature differences.
• 20 Atm. / 200 meters (also waterproof 20 atm. / Diving proof): These watches are suitable for all types of water sports and diving.
Watches for amateur or (semi) professional diving used to be a test standard of at least 15 atm. requirements. These casings can be high pressure and temperature variations at. The glasses are much thicker, much heavier cabinets and sealing gaskets are made much heavier. The rear lid is closed with a screw cap. The crown, where several seals are located, is much larger than other watches and after the control should use the casing to be screwed to obtain an extra good seal to reduce the risk of leakage due to collision.
To guarantee water tightness of these watches, frequent professional care is required, a yearly checkup is necessary.