Maybe he could use maple syrup as the calibration medium, instead of oil :)

I also note that he is interested in accurate temperatures at 102 C only, 
and nothing else.  Thus, repeatability is the real requirement.

With his being into this activity I would guess he already owns a good 
thermometer that can be used to calibrate the electronic thingy.

BTW, water boils at 100 C and you could probably add a bit of salt to raise 
it to 102.

Barry

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