Well the obvious answer is yes.  But as many of them are, they measure resistance and display somewhere between C and H.  As you may or may not know, a scan gage can be programed to display coolant temp in degrees.  So my rather simple question was at what temperature IN DEGREES does a fail safe operation occur?  As someone stated around 265.  I did find a pic of a gage that was stenciled as 265 on the H side.  Didn’t show the make of the vehicle though.