With depth increasing the pressure also increases which creates a force applied in a circular direction to the surface of the object. The pressure is usually measured in PSI (pounds per square inch). For example 14.7 psi = 1 atm = 33 ft = 1.01 bar. This means that at 99 ft the force applied to the object is 3 times greater than on the surface.
Water Resistance Info
There are different ways used to seal the watch. The most basic and effective element used today is a rubber gasket or an O ring. For better performance some watches are equipped with a screw down crown, which ensures a good seal between the crown and the case, since most leakage occurs through the crown.
Gasket Replacement Recommendations and Resistance Testing
To ensure a proper water tight seal it is recommended that the gaskets be inspected and changed every 2 years to prevent rips, tears, and deterioration of the gasket.
The watch is pressure tested in a dry chamber. The pressure is increased and the smallest variations in case deformation are detected.
about manhattan time service
As one of the leading watch specialists in New York, at Manhattan Time Services we are a family run business with a worldwide reputation for excellence and value. Our watchmakers know that the only thing better than owning a great watch is having it professionally serviced by master technicians.