Aftermarket Gauges vs Logger Variance

I have always noticed that when I am logging "MMCD" runs in my car that the data on my logger is always a little off than what my after-market gauges read.

For example my old Autometer water temp gauge had a bout a 3 degree difference than my Prosport gauges. Now if I compare those values to my logger there is almost a 10 degree difference..... So AF gauge would read 190deg logger reads 200deg!

Has anyone else notice a variance between your logger and gauges?

If so what gauges/logger are you using and what is the variance between the gauge and the logger?

nobody!!!

Thought I would post this since I just tested out my logger reading to my aftermarket gauge reading. Logger read 182F while my gauge was at 195F!

I feel like the gauge is more accurate though, since our thermostats are fully open at 194F, and my car was warmed up.

my greddy temp gauge reads within about 2 degrees of the logger. runs between 80 and 85 celsius