What really is: Water Resistant, Waterproof and IPX Ratings?
You are probably here because you have seen the various terms, water resistant, waterproof and IPX rating and found them a little confusing and want to know what the difference is. What really is: Water Resistant, Waterproof and IPX Ratings?
In this post, I hope to clarify the different degrees of waterproofing available on a number of products today. I also will cover dust protection another marketing term used today.
With our increasing smartphone mobile society, there is more wireless portable produces and various accessories available to connect via Bluetooth to your device. Like portable speakers, headphones, microphones and a number of other products. With this mobility going outdoors is inevitable and waterproofing and durability become more of a concern.
In the past a speaker normally sat on a shelf for its life, occasionally getting dusted and played loud on Saturday night. But a day in the life of today’s portable speaker can be much more active. It could start out playing tunes in the shower then tossed into a backpack and used down at the skate park. Taken on a hike or rafting down a river. No dust being collected on this speaker.
Today’s portable speaker makers have responded to this demand by producing more durable portable speakers with various degrees of durability, waterproofing and extended battery life.
We have all heard the term water-resistant used and don’t quite understand what that really means. How waterproof is it?
What really is: Water Resistant, Waterproof and IPX Ratings?
This is why the IP Code; International Protection Marking standard was created. This code determines a given product level of intrusion protection. Basically, it tells you the level of protection from solids and water in any type of mechanical casing or electrical enclosure.
The IP standard was put in place to provide consumers more detailed information than vague marketing terms such as waterproof or my favorite water resistant.
Breakdown of the code
IP followed by two digits.
First Digit : Solid Particles Protection
Second Digit : Liquid Protection
The first digit represents protection from solid particles like dust and dirt.
The second number is the amount of water or liquids it can be exposed to.
First Digit Code For Solid Particles
Size Of Particle
No protection against contact and entrance of foreign particles.
Particles greater than 50 mm
Any large surface of the body, such as back of a hand, but no protection against deliberate contact with a body part
Particles greater than 12.5 mm
This protection will keep fingers and small objects out.
Particles greater than 2.5 mm
Protects from tools, thick wires, etc.
Particles greater than 1 mm
Small wires, slender screws, large ants and bugs.
Keeps out most of the dust but not entirely. Will not allow sufficient quantities to interfere with the operations of the machine.
No dust will enter device. Based on 8 hours of testing.
Second Digit Code For Liquid Protection
no water protection
Dripping water (vertically falling drops) shall have no harmful effect on the specimen when mounted in an upright position onto a turntable and rotated at 1 RPM.
Test duration: 10 minutes
Water equivalent to 1 mm rainfall per minute
Dripping water when tilted at 15 degrees
Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle of 15° from its normal position. A total of four positions are tested within two axes.
Test duration: 2.5 minutes for every direction of tilt ( 10 minutes total)
Water equivalent to 3 mm rainfall per minute.
Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect, utilizing either:
a) an oscillating fixture, or b) A spray nozzle with a counterbalanced shield.
Test a) is conducted for 5 minutes, then repeated with the specimen rotated horizontally by 90° for the second 5-minute test.
Test b) is conducted (with shield in place) for 5 minutes minimum.
Splashing of water
Water splashing against the enclosure from any direction shall have no harmful effect, utilizing either:
a) an oscillating fixture, or b) A spray nozzle with no shield.
Test a) is conducted for 10 minutes.
Test b) is conducted (without shield) for 5 minutes minimum.
Oscillating tube: Test duration: 10 minutes, or spray nozzle (same as IPX3 spray nozzle with the shield removed)
Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects.
Test duration: 1 minute per square meter for at least 15 minutes
Water volume: 12.5 litres per minute
Powerful water jets
Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.
Test duration: 1 minute per square meter for at least 3 minutes
Water volume: 100 litres per minute
Powerful water jets with increased pressure
Water projected in powerful jets (6.3 mm nozzle) against the enclosure from any direction, under elevated pressure, shall have no harmful effects. Found in DIN 40050, and not IEC 60529.
Immersion, up to 1 m depth
Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion).
Test duration: 30 minutes - ref IEC 60529, table 8.
Tested with the lowest point of the enclosure 1000 mm below the surface of the water, or the highest point 150 mm below the surface, whichever is deeper.
Immersion, 1 m or more depth
The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. However, with certain types of equipment, it can mean that water can enter but only in such a manner that it produces no harmful effects. The test depth and duration is expected to be greater than the requirements for IPx7, and other environmental effects may be added, such as temperature cycling before immersion.
Test duration: Agreement with Manufacturer
Depth specified by manufacturer, generally up to 3 m
Powerful high temperature water jets
Protected against close-range high pressure, high temperature spray downs.
Smaller specimens rotate slowly on a turntable, from 4 specific angles. Larger specimens are mounted upright, no turntable required, and are tested freehand for at least 3 minutes at distance of 0.15–0.2 m.
There are specific requirements for the nozzle used for the testing.
This test is identified as IPx9 in IEC 60529.
Test duration: 30 seconds in each of 4 angles (2 minutes total)
Water volume: 14–16 litres per minute
IP Code Reference info from Wikipedia
What Is An IP Rating
About the Author
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