IPxx protection levels
IPxx protection levels is that a series of letters and numbers that indicate how much a device can be protected from certain external agents and, to make it immediately understandable, it was decided to resort to a series of codes that denote this type of protection.
These acronyms can be broken down as follows: the first two letters (IP) stand for "International Protection" (o Ingress Protection) and are present in any degree; the next digit indicates the protection of the critical or dangerous parts from contact (accidental or voluntary) with objects or with the human body itself.
The last digit, instead, indicates the protection of the entire device against access to liquids.
The standard indicates each of the two mentioned possibilities with a digit: as regards the protection of internal components from contact with solids, the figures range from one to six and define the various grades as follows - we will refer to "device coating" using the term "shell" :
IP0– : no protection (all external solid bodies can access);
IP1– : body protected against solid bodies larger than 50 mm (they cannot be reached, for example, from the back of the hand);
IP2– : body protected against solid bodies larger than 12 mm (they cannot be reached, for example, with one finger);
IP3– : body protected against solid bodies larger than 2.5 mm (they cannot be reached, for example, with a tool);
IP4– : body protected against solid bodies larger than 1 mm (they cannot be reached, for example, with an ordinary thread);
IP5– : shell partially protected against dust (or a particularly thin thread);
IP6– : body totally protected against dust (or a particularly thin thread).
As for the protection of internal components from contact with liquids, instead, as already mentioned we are talking about the last digit - which can vary from 1 ad 8 and defines the various degrees as follows (we will use the previous nomenclature):
IP–0 : no protection (all liquids can access the internal components);
IP–1 : body protected against vertically falling drops of water;
IP–2 : shell protected against falling water drops with an inclination of more than 15 °;
IP–3 : shell protected against rain;
IP–4 : body protected against direct water sprays;
IP–5 : body protected against direct water jets;
IP–6 : body protected against waves;
IP–7 : body protected against temporary immersion;
IP–8 : shell protected against continuous immersion (o sommersione, in this case we are talking about "underwater" devices).
IP67 certification: what it is and what it means.
Putting together what has been said so far, if the device in question has IP67 certification, it will have the body completely protected from access by dust or a particularly thin wire (solid protection: 6) and from temporary immersion in water, which means that the internal components will not be "dirty by dust" and that the device will not break if it accidentally falls into a pool of water (that it is the sea, a pool, a tub full of water, etc.) provided that it is raised in a reasonable time (liquid protection: 7).
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