Temperature Sender Adapter

[coop34]

I've seen many threads on the topic of a 1/2" temperature sender not fitting in the 3/8" whole in the block of a newer 5.7L, and I ended up going with a galvanized 90 degree step up adapter to solve the problem.

My question is, will I get an accurate reading if the end of the sender probe touches the inside metal of the adapter? I'm thinking that the metal would get hotter than the coolant which would give an incorrect reading. What do you guys think?