Many of the problems associated with Minimum Resolvable Temperature
Difference (MRTD) testing arise from a generally unstable environment, which is
especially so outdoors.
This paper describes a novel thermal arrangement (subject to a patent
application') in which the temperatures of a number of "Hot" MRTD bar
patterns are referred to a "Cold" MRTD bar pattern in a way that overcomes the
problems of an unstable environment and gives a quick "One-look" GO-NOGO test.