IPX7 Rating

An IPX7 rating is an official standard given to an electronic device, signifying it is water-resistant against temporary submersion. Specifically, it certifies that the product can be dropped into a body of fresh water up to 1 metre (about 3.3 feet) deep for up to 30 minutes without water getting inside and causing damage. It protects against accidental drops in a sink, bath, or puddle, but it does not mean the device is “waterproof” or suitable for swimming.

Breaking Down the IPX7 Rating

The term ‘IPX7’ can look technical, but it’s a simple code from a global standard (set by the International Electrotechnical Commission, or IEC). Each part of the code tells you something specific.

What Do the Letters ‘IP’ Mean?

IP stands for Ingress Protection. ‘Ingress’ is simply a technical word for the act of “going in” or “entering”. So, an IP rating measures how well a device’s outer casing protects its internal parts (like circuits and batteries) from the ingress of foreign materials—specifically, dust and water.

What Does the ‘X’ Mean?

The first number after ‘IP’ always rates the protection against solids (like dust and sand), on a scale from 0 (no protection) to 6 (completely dust-tight).

The ‘X’ in IPX7 simply means the device has not been officially tested or rated for its protection against solids. It does not mean it has zero protection; manufacturers often omit this test if dust isn’t a primary concern for the product (e.g., an electric toothbrush) to save on certification costs.

What Does the ‘7’ Mean?

This is the key part. The second number rates the protection against liquids (water), on a scale from 0 to 9K.

A rating of ‘7’ signifies protection against immersion. To earn this rating, a product must pass a specific lab test:

  • Depth: It is placed in a tank of fresh water at a depth of 1 metre.
  • Duration: It remains submerged for 30 minutes.
  • Result: After the test, it is inspected to ensure no water has breached its seals and entered the casing.

It’s important to know this test is static. The device is gently lowered and held still. It does not account for the extra pressure created by movement (like swimming) or the force of fast-moving water (like a power shower).

How Does IPX7 Compare to Other Ratings?

The IP rating system is not always a simple “higher is better” scale. Different numbers test for different things.

IPX7 vs. IP67: Adding Dust Protection

This is a simple comparison. An IP67 rating is a combination of two tests:

  • ‘6’ (Solids): The device is completely dust-tight. No dust can get in.
  • ‘7’ (Liquids): The device has the exact same water resistance as IPX7 (1 metre for 30 minutes).

Think of an IP67-rated smartphone. It’s ideal for use on a building site or a sandy beach because it’s protected from both dust and an accidental drop in water. An IPX7-rated electric toothbrush doesn’t need a dust rating, as it’s typically used in a clean bathroom.

IPX7 vs. IPX8: The Next Level of Submersion

An IPX8 rating is a step above IPX7 for submersion. However, unlike IPX7, the ‘8’ rating doesn’t have one single definition. It simply means the device is protected against submersion “beyond 1 metre” for a duration specified by the manufacturer.

  • IPX7: Always means 1 metre for 30 minutes.
  • IPX8: The manufacturer must state the exact conditions. For example, Apple states its recent iPhones (rated IP68) can handle a depth of 6 metres for up to 30 minutes. A diving watch might be rated IPX8 to 50 metres.

IPX7 vs. IPX6: Submersion vs. Water Jets

This is the most common point of confusion. IPX7 is not necessarily better than IPX6; they test for different types of water exposure.

  • IPX6: Protects against powerful water jets. The test involves spraying the device with a high-pressure nozzle (like a garden hosepipe) from all angles.
  • IPX7: Protects against submersion (being underwater).

A product can be rated for one but not the other. A seal designed to withstand the static pressure of being 1 metre underwater (IPX7) might fail when hit by a high-pressure jet (IPX6). Conversely, a device might be able to repel a jet (IPX6) but have seals that would fail if left sitting in water (IPX7).

Analogy: Think of your house. Your windows are great at keeping out a powerful, driving rainstorm (like an IPX6 jet). But if your street floods and the house is left sitting in a metre of still water (like an IPX7 submersion), the water will eventually find its way in under the doors.

What Is an IPX7 Rating For in Real Life?

This rating provides peace of mind for everyday accidents.

Common IPX7 Gadgets

You will commonly find this rating on:

  • Portable Bluetooth speakers (e.g., JBL Flip, UE Wonderboom)
  • Smartwatches and fitness trackers (e.g., many Fitbit models)
  • Electric toothbrushes
  • Some smartphones (though many now aim for IP68)
  • Headphones designed for running in the rain

What You Can Safely Do

An IPX7 rating means you don’t need to panic if you:

  • Get caught in a typical British downpour whilst out for a run.
  • Use your speaker by the side of a swimming pool or paddling pool.
  • Accidentally knock your phone into the washing-up bowl or a full sink.
  • Drop your smartwatch in the bath.

What You Shouldn’t Do

The IPX7 test is specific, and the rating does not cover:

  • Swimming or Watersports: The movement of your arm through the water creates dynamic pressure that is far greater than the static pressure of a 1-metre test.
  • The Sea: The test uses fresh water. Salt water is highly corrosive and can damage the rubber seals that make the device water-resistant.
  • Hot Tubs or Saunas: High temperatures can warp the seals, and steam can penetrate gaps that liquid water cannot.
  • Power Showers or Jet Washing: These are high-pressure jets (the IPX6 test), not submersion. An IPX7 rating offers no guarantee against this.

Common Misconceptions About IPX7

Misconception 1: “IPX7 means it’s waterproof”

This is the biggest misconception. No consumer electronic is truly “waterproof” forever. The correct term is water-resistant. The seals that provide this resistance can (and will) degrade over time, especially with exposure to chemicals (like chlorine or soap) or from physical drops that slightly warp the casing.

Misconception 2: “IPX7 is fine for a shower”

This is risky. Whilst a quick splash is fine, a modern power shower creates high-pressure jets of water. This is an IPX6 (jet) scenario, not an IPX7 (submersion) one. Furthermore, the heat and steam of a hot shower can compromise the device’s seals over time.

Misconception 3: “My IPX7 device’s water damage is covered by the warranty”

Almost never. Most manufacturers, including Apple and Samsung, explicitly state that liquid damage is not covered by their standard warranty, even on IP-rated devices. The rating is a measure of resistance in perfect lab conditions, not a guarantee against all real-world water-related failures.

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