Does ANYONE know ohm reading on sensor?

[Purple]

I saw somewhere that there is an ohm reading for the temp sender when its cold and then when its hot. Does anyone know if the sender I got at the parts store would read the same as one out of the classic parts catalogs?? I have posted about a temp gauge that will slowly make its way to the H after 30-40 minutes of driving, but I have a Fluke meter on the top hose that will say 170-180 degrees. Is it possible that the new sender is calibrated differently then one from the catalogs???

 

[10secgoal]

Check to make sure there are no air pockets in the cooling system. Have the same problem on a car right now we can't seem to burp. gonna take out the t-stat and put a small hole in it. The air can hit the t-stat not letting it open up. And it can show normal at the hose because it lets the coolant out very slow.