Radiator recommendations

Highway running temp after about 20 mins on the road before and after cleaning, 80 degrees ambient temp, AC off:


Is that a remote sender, or the thermocouple type (with the sender permanently attached to the gauge)?
I had a thermocouple type, and found that my headers were actually causing a heat soak into it that was giving me inaccurate readings. Kept wondering why it would read 225~230 when my IR gun only ever measured 180 anywhere on the engine (with a 180 tstat).