Protection level for waterproof enclosure

- Apr 20, 2019-

As a professional manfacturer of kinds of box enclosure for electronic device,we always meet some customers ask for box with IP65,IP67,even IP68 enclosure.So what is the real meaning of IP65,IP67 etc.

I'll give a simple intruduction of the protection level on today's topic.

What's IP?

IP(INGRESS PROTECTION) It was drafted by the IEC(INTERNATIONAL ELECTROTECHNICAL COMMISSION),Electrical appliances are classified according to their dust and moisture resistance.

The IP protection level is composed of two numbers. The first number indicates the level of dustproofing and prevention of foreign objects entering the appliance. (The foreign objects contained in this article contain tools, and human fingers are not allowed to touch the live parts of the appliance. In order to avoid electric shock) the second number indicates the degree of airtightness of the appliance against moisture and water immersion. The higher the number, the higher the degree of protection.

1).First digital:Solid particle protection

The number from 0 to 6,description of each number as below:

0:No protection against contact and ingress of objects

1: >50 mm,Any large surface of the body, such as the back of a hand, but no protection against deliberate contact with a body part

2:>12.5 mm,Fingers or similar objects

3:>2.5mm,Tools, thick wires, etc.

4:>1 mm,Most wires, slender screws, large ants etc.

5:Dust protected,Ingress of dust is not entirely prevented, but it must not enter in sufficient quantity to interfere with the satisfactory operation of the equipment.

6:Dust tight,No ingress of dust; complete protection against contact (dust tight). A vacuum must be applied. Test duration of up to 8 hours based on air flow.

2).Second digit: Liquid ingress protection

The second digit indicates the level of protection that the enclosure provides against harmful ingress of water. The ratings for water ingress are not cumulative beyond IPX6. A device which is compliant with IPX7, covering immersion in water, need not be compliant with IPX5 or IPX6, covering exposure to water jets. A device which meets both tests is indicated by listing both tests separated by a slash, e.g. IPX5/IPX7

The number from 0 to 8,description of each number as following:


1:Dripping water,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.

2:Dripping water when tilted at 15°,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.

3:Spraying water,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.

4: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.

5:Water jets,Water projected by a nozzle (6.3 mm) against enclosure from any direction shall have no harmful effects.

6:Powerful water jets,Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.

7: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).

8: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.

Now maybe you have a clear concept of the protection level,it will help you to choose the most suitable enclosure for your products.