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The watch shall show no air-flow exceeding 50 μg/min. Except the thermal shock resistance test all further ISO 6425 testing should be conducted at 18 to 25 °C temperature. Regarding pressure ISO 6425 defines: 1 bar = 10 5 Pa = 10 5 N/m 2.
A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 1.1 MPa (11 atm), the equivalent of 100 m (330 ft). The typical diver's watch will have a water resistance of around 200 to 300 m (660 to 980 ft), though modern technology ...
Some watches use bar instead of meters, which may then be multiplied by 10, and then subtract 10 to be approximately equal to the rating based on metres. Therefore, a 5 bar watch is equivalent to a 40-metre watch. Some watches are rated in atmospheres (atm), which are roughly equivalent to bar. [citation needed]
The metre (or meter) sea water (msw) is a metric unit of pressure used in underwater diving.It is defined as one tenth of a bar. [1] [2]The unit used in the US is the foot sea water (fsw), based on standard gravity and a sea-water density of 64 lb/ft 3.
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The word bar has its origin in the Ancient Greek word βάρος (baros), meaning weight. The unit's official symbol is bar; [citation needed] the earlier symbol b is now deprecated and conflicts with the uses of b denoting the unit barn or bit, but it is still encountered, especially as mb (rather than the proper mbar) to denote the
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