Due to the launch of the new Motorola MC67 rugged mobile computer, we already got a bit our first questions on what the exact differences are, specifically in terms of the ruggedness of the Rugged Mobile Computer so we thought we’d do a quick blog today on the major differences at the top of the IP scale. We already did a great blog here about IP ratings in general but here we’ll zoom in on the top end.
IP and Dust
There are 2 ratings that we’re worried about in terms of dust intrusion,. which is the first digit in the IP number. IP6X is the top number and it means that the mobile computer is totally dust tight. This means nothing gets in at all! IP5X does not actually mean a device is dust “tight” but it does mean dust will not alter the functionality of the device. This mean dusty screens are still a big no-no and it usually means that the rugged mobile computer has some kind of plate somewhere that dust can lie under but still not affect the device over its life.
To be honest we rarely see anything IP5 or 6X that has dust that has affected it or indeed got under the skin of the mobile computer. Anything below this is not rugged!
IP and water
So what exactly is the difference between IP 65 and IP67.
Well in terms of dust protection, it’s the same, but in terms of water there is a difference.
IP65 rugged mobile computers are protected from “jets” of water from all angles. This means they are more water-resistant than just weather as these jets of water in the IP tests tend to be more powerful and smaller in nature. It shows the mobile computer is more than protected against rain.
IP66 we rarely see but it means the device is protected form “Powerful Jets” of water. Again this is slightly open to interpretation but it means in our experience that you can hose a mobile computer down.
so IP67 then is where we get jiggy with immersion in water. People don’t realise that make something watertight is hard enough but to withstand water pressure from immersion, even at 1M is a pretty special thing! Immersion in “up to 1M” is what IP67 gives you and there’s usually a time limit that comes with this figure too. Typically the manufacturer will specify the exact meaning of this on their spec sheet but you should in essence be safe to drop your device in up to 1M of water as long as you get it out quickly enough.
I have to say that in my experience IP ratings do have to be taken relatively. We see devices that push it when stating they’re IP65 and some stating they’re IP54 could be more. I think the MC65 is one of these and is the reason Motorola have probably found it natural to launch and IP67 device. The Motorola MC65 range is very reliable when it comes to its IP ratings.
The Rugged and Mobile blog.