Short answer
IP67 means two separate things: the 6 certifies no ingress of dust, and the 7 certifies protection against immersion in water. Per IEC, which owns the code, the first digit covers solid objects and the second covers liquids. Temperature and mechanical impact are not graded by either digit at all.
Key takeaways
- The two digits are independent scales: solids 0–6, liquids 0–9. A device can score high on one and low on the other.
- Temperature is absent from the IP code entirely, an IP67 device carries no heat guarantee from that rating.
- Sealing against dust also blocks convective cooling, so the rating that suits Gulf dust can worsen the thermal problem.
- IP67 and IP68 are not simply "better and best", IP69K tests high-pressure hot water, a different exposure again.
- Read the operating temperature row separately; on our own catalogue the JT701 is IP67 and rated −20 °C to +70 °C as two distinct specs.
01Two digits, two unrelated tests
The IP code is published by IEC, the standards body that owns it, and its structure is simpler than its reputation suggests. IEC states that the first numeral refers to protection against solid objects, rated on a scale from 0 for no protection to 6 for no ingress of dust. The second numeral rates the enclosure's protection against liquids, on a scale from 0 to 9. So IP67 is not one score. It is two independent results printed side by side: a 6 for dust and a 7 for water. This matters when comparing datasheets, because a device rated IP65 and one rated IP67 differ only in the liquid test, while both claim the same top dust result. A buyer choosing for a dusty inland site and a buyer choosing for a washdown bay are reading two different digits.
Steps
- Decide what the site actually presents: dust, water, immersion or washing
- Match the first digit to the dust exposure
- Match the second digit to the water exposure
- Read the operating temperature row on its own
- Ask separately about impact and vandalism
- Treat a battery's thermal limits as a further specification
02What the 6 actually certifies
A 6 in the first position is the top result on that scale, and IEC describes it as no ingress of dust. That is a meaningful claim for the Gulf, where fine airborne dust is the dominant environmental stress on outdoor electronics for most of the year. It is worth noting what the scale below it means, because mid-range ratings are common on cheaper hardware: the lower numbers grade protection against progressively smaller solid objects rather than dust specifically, so a device that stops a finger or a wire is not making any claim about dust at all. If a site is dusty, the first digit is the one to check, and only a 6 is a dust claim. Our own catalogue lists the JT701 padlock and the Eurosens Dominator sensor at IP67, so both carry that top dust result.
03What the 7 certifies, and why 8 is not simply better
A 7 in the second position certifies protection against immersion in water, which is a stronger claim than resistance to spray or splashing. The intuitive next step is that 8 must be strictly better and 9 better still, and that is where the scale stops behaving like a simple ladder. The top of the liquid scale, which IEC describes as high-pressure hot water from different angles, tests a genuinely different exposure rather than more of the same one. A device built to survive immersion is not automatically built to survive a pressure washer, and a device built for pressure washing is not necessarily rated for prolonged immersion. So the right question is not which number is highest but which exposure the installation actually presents: a buried or flooded enclosure, a washdown bay, or neither.
04The two things the code never grades
Because the two digits cover solids and liquids, everything else is outside the rating. Two omissions matter most for a Gulf buyer. Temperature appears in neither digit, so an IP67 device carries no heat-tolerance guarantee from that rating whatsoever, its thermal limits live in a separate row of the datasheet and must be read separately. Mechanical impact is likewise ungraded: the IP code says nothing about surviving a drop, a crush load, or a deliberate strike, which for a padlock or a roadside enclosure is often the more relevant risk. Treating IP67 as a general ruggedness score is the common error, and it is an error of category rather than degree, because the rating was never designed to answer those questions.
05Where sealing and cooling pull against each other
There is a consequence to the temperature omission that goes beyond the rating being silent. The physical means of earning a 6 for dust is to seal the enclosure, and a sealed enclosure cannot shed heat by convection. So the specification that best answers the dust problem is the same specification that worsens the heat problem, and in a climate that presents both, optimising one in isolation makes the other harder. The practical reading is that dust protection and thermal management are two separate design decisions that happen to interact: an IP67 device in direct sun needs shading or a light-coloured housing precisely because its sealing has removed one of its cooling paths. Neither digit of the rating will tell you that.
06How to read it on a real datasheet
A worked example from our own catalogue shows the separation clearly. The Jointech JT701 padlock is listed at IP67, and its operating temperature is listed independently as −20 °C to +70 °C. Those are two different rows answering two different questions, and neither implies the other. The same listing carries a 15,000 mAh battery, dual SIM, GSM and 3G connectivity, and GPS accuracy of 2.5 m CEP, none of which the IP rating speaks to either. The habit worth building is to stop reading IP as a summary and start reading it as one row among several: check the first digit against the site's dust, the second against its water exposure, then read temperature, impact and battery as separate specifications with their own limits.
07A short checklist before you order
The sequence is short enough to run on any quotation. Decide what the site actually presents: dust, standing water, immersion, high-pressure washing, or a combination. Match the first digit to the dust exposure, and accept only a 6 where dust is the real stress. Match the second digit to the water exposure rather than assuming a higher number is strictly better. Then read the operating temperature row on its own and judge it against the site's worst afternoon, not its average. Ask separately about impact and vandalism if the device is reachable by hand. And where the device carries a battery, treat its thermal limits as a further separate specification, since a cell almost always has a narrower range than the enclosure around it.
| Question | Answered by the IP rating? | Where to look instead |
|---|---|---|
| Will dust get in? | Yes, the first digit; only a 6 is a dust claim | , |
| Will it survive immersion? | Yes, the second digit, a 7 or above | , |
| Will it survive a pressure washer? | Only at the top of the liquid scale, a different test | The specific second-digit value, not "higher is better" |
| Will it work at 50 °C? | No, temperature is not in the code | The operating temperature row |
| Will its battery charge at 50 °C? | No | The cell's own charge-temperature row |
| Will it survive a drop or a strike? | No, impact is not graded | Housing material and any impact rating |
| Will it overheat in direct sun? | No, and sealing makes this harder | Enclosure colour, shading, ventilation |
Figures and sources
- What the first IP numeral grades, and its scale: solid objects, 0 (no protection) to 6 (no ingress of dust) (Source: IEC, Ingress Protection (IP) ratings, as of 2026-08-31)
- What the second IP numeral grades, and its scale: liquids, 0 (no protection) to 9 (high-pressure hot water from different angles) (Source: IEC, Ingress Protection (IP) ratings, as of 2026-08-31)
- The standard that defines the IP code, and its first edition: IEC 60529, first edition 1976 (Source: IEC, Ingress Protection (IP) ratings, as of 2026-08-31)
- Temperature and mechanical impact in the IP code: graded by neither numeral, absent from the code entirely (Source: IEC, Ingress Protection (IP) ratings, as of 2026-08-31)
- Jointech JT701 ingress rating and operating temperature, listed as separate specifications: IP67; −20 °C to +70 °C (Source: ENTEK.AI product catalogue, as of 2026-08-31)
- Jointech JT701 battery capacity and connectivity, neither covered by the IP rating: 15,000 mAh Li-ion; dual SIM; GSM / 3G (Source: ENTEK.AI product catalogue, as of 2026-08-31)
- Jointech JT701 stated GPS accuracy, a specification independent of ingress protection: 2.5 m CEP (Source: ENTEK.AI product catalogue, as of 2026-08-31)
- Eurosens Dominator fuel level sensor ingress rating and temperature range: IP67; −40 to +85 °C (Source: Mechatronics, eurosens Dominator specification, as of 2026-08-31)
Questions
Is IP68 always better than IP67?
Not in every sense. Both claim the top dust result, and the second digit describes a different water exposure rather than simply more of it, the top of the liquid scale tests high-pressure hot water, which is a different test from immersion. Match the digit to the exposure your site actually presents.
Does IP67 mean the device works in Saudi summer heat?
No. IEC grades only solids and liquids; temperature is absent from the IP code entirely. Read the operating temperature row separately, and if the device has a battery, read the cell's own limits too, they are usually narrower than the enclosure's.
Is a higher IP rating always the safer purchase?
Not automatically. Better sealing blocks convective cooling, so in a hot climate a more sealed enclosure can run hotter. Buy the rating the site actually needs and treat thermal management as a separate decision, shading and a light-coloured housing address what the IP rating cannot.
Where do I check impact and vandalism resistance?
Not in the IP rating, which does not grade mechanical impact at all. Look at the housing material, any separate impact rating the manufacturer publishes, and the mounting method. For a padlock or a reachable roadside enclosure this is often the more relevant risk than ingress.