It’s said the man with one watch knows what time it is. The man with two watches is never quite sure.

I have the the same problem today, but with temperature.

I’m measuring the temperature of the oven with the oven light on. I’m working on starting a sourdough starter.

Of course the difference that’s being read is on on the order of a few µV. It’s within the margin of error in this case. The type K thermocouple is really optimized for a much higher temperature.

So later on I’ll be making some sourdough of course and that’s a whole other thing.  :-)