temp sensor question

The Blue-Streak catalog used to have a couple of pages of them, including specs and thread sizes and such.
You can test them by putting them in oil and slowly bringing the temp up. Engine oils typically don't boil until past something like 250. With a voltmeter attached, it will flip from infinite resistance to zero resistance, at the switch-point.

My Standard Catalog lists several Mopar switches that flip at 220*F.