An IPX-7 rating on thermal imaging devices means that the scope is protected against immersion in water up to 1 meter for a duration of up to 30 minutes.
IPX rating is a standard used to measure the protection against water, although it is not as detailed as the IP rating. IPX-7 means that the scope is protected against immersion in water up to 1 meter for a duration of up to 30 minutes. This means that the scope can be submerged in water up to 1 meter deep for a short period of time and still function properly.
It is important to note that the IPX rating does not provide information about the protection against dust or solids, only liquids. Additionally, it is not a permanent protection and can be damaged if exposed for a long period of time or if the scope is not properly closed or sealed.