Going to package sender for airbox temperature and 5 others. 
I have an Ilec SC-7 Variometer that has a temperature read out. It is driven by tiny 3/16" cylinder x 3/16" long precision semiconductor thermal sender. 
Here we are warming along with a thermocouple driven probe. Tracking is very very close to thermocouple driven probe. 32°F was spot on with snow cup. Sprayed some freeze spray and it went to at least -40°F. Here it is at 165°F. 
Precision temperature sensor specs: 
National Semiconductor 
3-TO-92 package 
-55 to 150C 
Y10-02-18
 
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