Scr motor controller parts to build your own power regulator for a electric still.

This parts can be purchased at Aliexpress, Amazon and EBay to build a electric element regulator for constantly power but can be regulated by changing the voltage, watts and amps running to the elements from 0 to 100 percent.
AU $11.78 40%OFF | KWS-AC300 Voltmeter Ammeter KWS Power Energy Meter AC 50-300V LED AC Wattmeter Electricity meter with Reset Function 0-100A
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Voltage meter.
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10 000 watts Scr motor power regulator.
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Ssvr (solid state variable relay)
AU $12.12 8%OFF | SSR-40VA Voltage Regulator Solid State 40A 25~480VAC rele con telecomando for PID Temperature Controller + Potentiometers * 1PC
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Solid state variable relay (Ssvr) 100amp good for 22000 watts.
AU $14.46 6%OFF | 100A SSR-100VA VR To AC Solid State Relay Voltage Regulator Module SSVR-100A Resistance Voltage Regulator 220/380VAC
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You will also need to put a cooling fan in and mount the ssvr relay to a heatsink with thermal paste and a small power supply to power the cooling fan to the relay.