Temperature Question

[davidson2100]

I was hoping someone could help me out. I am getting a false reading on my engine temp, the guage reads all the way in the red after a short drive, but checked the temp with a gun all around engine and radiator and nothing more than 190-200, so I am not overheating. I changed the gauge, sensor, thermostat, water pump and had radiator checked. So I do not know, would running a new wire from the sensor to gauge help at all, or is there anyway my circuit plate could be giving me trouble. HELP!