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The other day I scored a stirring hotplate from the thrift store for $6. It looked new and is originally about $500-$600. The value in this heat source is the stability of temperature over time. I used a datalogger and collected about 7,192 data points to illustrate it.
- On the left: the blue box, the profile represents the heating of 2 gallons of water on heat setting 3,
- Next is the black box showing the cooling period when I turned the heat down to "2"
- The green box shows the same 2 gallons heated at the lower setting and finally,
- The black box on the right shows water heated in a slow cooker, observe the oscillating pattern.
Below is a scale expansion of the blue box to show the range of temperature:
Cool or what??