Why is the IP rating important? An IP rating is an extremely important factor to consider when purchasing a gage. While there are circumstances where the precision measurement environment you will use the gage in is relatively controlled, you always want to know the degree to which your tool is protected. There will be a variety of needs for protection, and you will not necessarily require the highest level. However, knowing what level of protection you do have available can save you time and money. There are a number of different and unexpected circumstances that can happen to a tool when it is in use. Perhaps you need your gage for factory work and you know that the climate is controlled and clean, and there should be no risk of dust or water in the area. However, what if a pipe bursts in the wall of the factory, or someone forgets protocol and brings in dust particles from another project. While you cannot protect against every possible scenario, you will want to use the IP rating of your gage to your advantage to determine what level of protection is necessary.