Water resistance of watches (ATM)
Water resistance is a great feature of most watches; however, it is not a permanent condition.
Regardless of how water resistant a watch is, over time, the seals that seal the watch become dry and brittle, and its water resistance can be compromised.
Exposing the watch to harsh conditions such as chlorinated pools, salt water, or shower chemicals can cause the seals to weaken.
It is recommended that seals be replaced at least every 18 months to maintain the water resistance of your watch.
To keep your watch water-resistant for as long as possible, follow these guidelines:
- Wipe off any moisture, sweat or dirt with a soft dry cloth after removing the watch from your wrist.
- After using the watch in ocean water, wash it in fresh water and wipe it with a soft cloth.
- Do not wash the waterproof watch with the crown pulled out.
- Avoid washing the watch directly under running water, wash it in still water in a sink or bowl.
What are ATM markings on watches?
Water resistance in watches is measured in atmosphere (ATM) or "bar". These are measurements used by the watch industry to indicate the amount of pressure a watch can withstand. One atmosphere is equal to approximately 10 meters. For example, if your watch is water resistant to 50 meters, this refers to the amount of pressure the watch case can withstand, not the depth to which the watch can be worn.
What are ATM markings on watches?
The marks are used as an international guide to show the water resistance of watches.
Each individual marking rating tells you the number of 'atmospheres' of pressure the watch can withstand when stationary underwater.
TABLICA VODOOTPORNOSTI SATOVA
ATM | Preporuka |
---|---|
WR | Sat nije vodootporan, izbjegavajte svaki doticaj s vodom, sat nije namjenjen za doticaj s vodom. |
30m / 3ATM / 3bar | Dozvoljeno samo neznatno prskanje, ali ne plivanje i ronjenje. |
50m / 5ATM / 5bar | Satovi koji su samo za neznatno prskanje, tuširanje ili kupanje, ali nije preporučen uron sata u dublju vodu. |
100m / 10ATM / 10bar | Satovi pogodni za rekreativno plivanje i površinsko ronjenje. |
200m / 20ATM / 20bar | Satovi koji su pogodni za rekreativno ronjenje i plivanje (ronjenje na dah). |
300m / 30ATM / 30bar i više. | Satovi koji su namjenjeni za dubinsko i profesionalno ronjenje (s bocom). |