What is the difference between 100 meter water resistance and 10 bar water resistance?
The word “Bar” refers the standard pressure of the weight of air when measured at sea level. Pressure increases underwater. A watch that is water-resistance-rated at 10 bar (10 times the pressure at sea level) is sometimes said to have 100-meter resistance. Five bar = 50 meters, and so on. But this is not completely accurate. If you take a 10-bar watch to a depth of 100 meters, then tap the face, it may implode. It’s better to think of three bar as acceptable for bathing and swimming, five bar for water sports that involve diving and swimming underwater, and 10 bar and above acceptable for scuba diving in less than 30 meters of water. Remember also that you can’t press buttons underwater without risking water damage.
