What's an IP rating, and why does it matter when choosing packaging equipment?

Danielle Ohl

drop-of-water-264071_1920.jpgWhat do the words "water-resistant" or "dust-proof" mean to you? 

Manufacturers of everything from cameras to packaging equipment use descriptive terms like these to market their products.

But confusion can arise when my definition of "water-resistant" differs from yours. To create conformity, Ingress Protection ratings (IP Ratings) were developed by the European Committee for Electro Technical Standardization (IEC 60529).

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What is an IP Rating?

An IP Rating represents the level of protection provided by a device against the intrusion of solid objects and liquids. An IP Rating usually has two numbers: The first number represents the level of protection from solid materials and the second number represents the level of protection from liquids. A third letter describing other information can be used but is often omitted.

Protection against solids

The first digit of an IP Rating is a number that describes the object's protection against solids, with 0 offering no protection and 6 offering the most protection. 

Protection against liquids

The second digit of an IP rating is a number that describes the level of protection against liquids, with 0 offering no protection and 9K offering the most protection.

Other protections

A letter can describe other information related to the protection of the enclosure. This is optional and not commonly used.

Why is an IP Rating important?

When a manufacturer desires an IP Rating for their product, they must have it tested by an independent and certified company. That company assigns a numerical IP Rating to the product to signify how well the item protects against intrusion of solids and liquids.

Having a certified IP Rating means manufacturers can confidently make product claims about the level of protection their product provides. It legitimizes the item, offering assurance to the customer that they can determine if a product meets their needs.

Additionally, a user of IP Rated equipment is fully aware of its protective measures (or lack of), so they can work more safely, with less risk of injury to themselves or damage to the equipment.

IP Rating reference chart

Below is are some easy reference charts that can help you determine which IP rating is best for your needs:

First digit: Solid particle protection

The first digit indicates the level of protection that the enclosure provides against access to hazardous parts (e.g., electrical conductors, moving parts) and the ingress of solid foreign objects.

Level Effective against Description
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 >12.55 mm Fingers or similar objects.
3 >2.5 mm 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 airflow.

 

 

 

 

 

 

 

 

Second digit: Liquid ingress protection

The second digit indicates the level of protection that the enclosure provides against harmful ingress of water.

Level Protection against Effective against
0 None --
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.

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.

6K

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.

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 that 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.

9K

Powerful high-temperature water jets

Protected against close-range high pressure, high-temperature spray downs.

Additional letters

Further letters can be appended to provide additional information related to the protection of the device:

Letter Meaning
f Oil resistant
H High voltage device
M Device monitoring during water test
S Device standing still during water test
W Weather conditions

What kinds of IP Ratings are found on packaging equipment?

On most packaging machines, electrical and pneumatic enclosures are IP Rated. These can be circuit boxes, cabinets, or any other enclosed structure that protects internal electrical and pneumatic components. These components can malfunction, fail, or cause injury to operators when exposed to solid objects or liquids.

For example, packaging machines require an electrical cabinet to house all the electronic components required to power and operate the packaging machine. These cabinets will often have one of the following IP Ratings:

  • IP65: Dust-tight and protected against low-pressure water jets
  • IP66: Dust-tight and protected against strong jets of water
  • IP67: Dust-tight and protected against temporary, limited depth and duration immersion in water
  • IP68: Dust-tight and protected against complete immersion in water

The type of IP Rating necessary for packaging equipment enclosures will be determined after the machine manufacturer carefully evaluates your packaging environment, the properties of the product you are packaging, and what your cleaning procedures are.

Why is an IP Rating important when choosing packaging equipment?

When it comes to choosing the right packaging machine for your needs, the IP Rating of an enclosure is extremely important, especially in the food industry.

Dusty environments

Consider a dusty packaging environment for products like snacks or coffee. Particulates created when the product is in motion can wreak havoc on exposed electrical and pneumatic components on packaging machinery. Dust control options can help with decreasing the amount of particulate in the air, but dust will still be able to penetrate improperly sealed enclosures. A solid IP rating of 5 - 6 should be considered for dusty applications. For this type of environment, waterproof enclosures are not as vital, so the liquid IP rating does not have to be as high.

Wet environments

Protection from liquids like water and cleaning solutions is vitally important in many food packaging applications. Many packaging machines for food products like cheese, meat, or sticky candy will need to be cleaned regularly, and the packaging machinery must be rated to withstand whatever washdown process is required. For wet environments, a liquid IP rating of 5 - 8 should be considered. For this type of environment, the solid IP rating is not as important and does not have to be as high.

Both dusty and wet environments

If the packaging environment is both dusty and necessitates harsh washdown procedures, a total IP rating of 55 - 68 should be considered for a packaging machine. This covers environments in which dust protection is required as well as protection from water jets, up to environments in which enclosures must be dust-proof as well as able to withstand immersion in water.

Nail down the specs for your next packaging machine

When considering a packaging machine purchase, nailing down the specifications for ingress protection and washdown requirements is a key part of planning. Don't forget a single detail! Download our free Packaging Equipment Project Planning worksheet to get started:

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Originally published 5/25/2016, updated 5/3/2018, 10/24/2019, 4/22/2021.