A technical guide on water and dust resistance, salt water risks and the main smartphone options for summer
Choosing the best IP68 cell phone to take to the beach involves understanding not only the device’s resistance specifications, but also the physical limitations of the technology when compared to salt water and sand. Devices with this certification are designed to withstand submersion in fresh water and prevent the entry of solid particles, offering an extra layer of security for photographic records and communication in coastal environments, as long as adequate post-use maintenance care is observed.
What is IP68 certification
The acronym IP refers to “Ingress Protection”, an international standard defined by the IEC 60529 standard. The code is made up of two digits that classify the degree of protection provided by electrical equipment boxes and casings.
In the context of cell phones for the beach, the IP68 code unfolds as follows:
- Number 6: Indicates full protection against dust. The device is hermetically sealed so that no solid particles, including fine grains of sand, can penetrate the internal components.
- Number 8: Indicates protection against continuous immersion in water. Generally, this means that the device can be submerged to depths greater than 1 meter (often up to 1.5m or 2m) for 30 minutes, as specified by the manufacturer.
It is essential to note that laboratory tests for IP68 certification are carried out in fresh and stagnant water. The dynamics change considerably in saltwater or high pressure environments (water jets or waves).
How sealing works on smartphones
Water resistance in smartphones is not magic, but rather the result of physical and chemical precision engineering. The protection mechanism is based on the creation of physical barriers that prevent liquids from contacting sensitive electronic circuits.
The main components of this mechanism include:
- Gaskets and sealing rings (O-rings): High-density rubber or silicone strips are placed around all chassis openings, such as the SIM card tray, side buttons, and the junction between the screen and the device body.
- Waterproof stickers: Specific industrial glues are used to seal the battery and other internal components, ensuring that the housing remains together under pressure.
- Hydrophobic meshes: The sound outputs (speakers and microphones) cannot be completely closed, as air must pass through to propagate the sound. In these places, an ultra-fine mesh is used that allows sound waves to pass through, but whose surface tension prevents the entry of water molecules.
- Internal linings: Many circuit boards receive a nanometer water-repellent coating to prevent short circuits if moisture manages to penetrate external barriers.
Practical applications and recommended models
The search for the best IP68 cell phone to take to the beach generally falls on top-of-the-line models (“flagships”), as high-quality sealing makes the manufacturing process more expensive. Below are categories and examples of devices that utilize this technology effectively:
- Samsung Galaxy S Line (S23, S24 and Ultra): Historically consistent with IP68 certification. They are known for alerting the user via software if there is moisture in the USB-C port, preventing charging until the port is dry.
- Apple iPhone (13, 14, 15 and later): Apple frequently exceeds the minimum IP68 requirements, promising resistance of up to 6 meters deep for 30 minutes in some models, which offers a greater safety margin against accidents at the seaside.
- Google Pixel (7, 8 e Pro): They offer standard IP68 protection, ensuring safety against accidental falls into water or contact with sand.
- Rugged Cell Phones (Rugged Phones): Brands like Caterpillar or specific models from the Samsung XCover line are designed for hostile environments. In addition to IP68, many have military certification (MIL-STD-810H), being more resistant to falls on rocks or extreme thermal variations common in summer.
Advantages and challenges in coastal use
Although IP68 technology is a great advance, the beach environment presents variables that the laboratory does not perfectly simulate.
Advantages:
- Accident safety: Accidental falls into the surf or natural pools do not result in immediate loss of the device.
- Ease of cleaning: You can wash the device with fresh water to remove sunscreen, sand and sea spray after a day at the beach.
- Sand protection: Level “6” of protection guarantees that fine sand will not get under the screen or into the circuits, which could render the device unusable.
Challenges:
- Saltwater corrosion: Salt is highly corrosive and conductive. If seawater dries in the device, the salt crystals can damage the rubber seals and corrode the metal contacts in the charging port.
- Natural wear: Water resistance is not permanent. Drops, excessive heat (common under the beach sun) and time degrade sealing glues and rubbers.
- Limited Warranty: Most manufacturers, even certifying the device as IP68, do not cover damage caused by liquids under warranty, citing misuse or submersion beyond the limits.
Frequently Asked Questions (FAQ)
1. Can I take photos underwater at sea with an IP68 cell phone?
Technically possible, but not recommended without an additional waterproof cover. Sea salt can deteriorate seals quickly, and if there are any microcracks, salt water will cause immediate corrosion of internal components.
2. What should I do if my cell phone falls into sea water?
Retrieve it immediately and wash it with plenty of fresh water (bottled or tap), but at low pressure, to remove all the salt. Dry it with a soft cloth and do not charge it until you are completely sure that the USB port is dry.
3. Can sand scratch the screen even with Gorilla Glass protection?
Yes. Sand is mainly composed of quartz and silica, minerals that are harder than the tempered glass found in most smartphones. IP68 certification protects against sand ingress, but not against scratches on the screen caused by friction.
Choosing a smartphone for the summer should prioritize models with proven and recent IP68 certification, such as top-of-the-line models from Samsung or Apple. However, the technology should be seen as a safety measure against accidents, and not as an invitation for indiscriminate underwater use, especially in salt water. The best practice to ensure device longevity is to combine the device’s native resistance with freshwater cleaning care immediately after exposure to the beach environment.
