1. A thermostat is placed in the top of the column. When the temperature becomes too high the thermostat switches off THE LAST element of the heat source. The distillation continues with a little less heat applied and does not stop in the "slow period". Then the thermostat switches on the current again, an inexpensive and effective solution.
2. An electronic temperature transducer is fitted in the top of the column. Note that this is a low voltage component and must be connected electronically.
When the temperature becomes too high the control redirects the current to the heat source via a rheostat (stepless power control) which is set to give slightly lower power to the heat source. This does the same thing as solution 1 but more accurately. An electronic temperature transducer is sensitive to one tenth of a degree, whereas a thermostat is accurate to 1-2 degrees. The electronic control can also be connected to a solenoid valve that opens an extra through-cooling in the column.
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