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[SkyHighLer]

I recently completed a project to compare ways to control distillation temperature and power, here's the five I came up with:

1 Variac alone (a 20 amp unit from eBay for about $75 is recommended)

2 Rotary encoder power regulator with solid state relay (Auber DSPR1)

3 Temperature controller with PID or ON/OFF or Limit function with an external heavy duty mechanical relay* to control the temperature when using either a Variac or rotary encoder power regulator (Auber SYL-1512A2 temperature controller)

4 Temperature controller with PID or ON/OFF or Limit function with it's internal mechanical relay* used to interrupt the solid state relay signal from a rotary encoder power regulator (Auber SYL-1512A2 temperature controller and a Auber DSPR1 power regulator and a solid state relay)

5 Rotary encoder power regulator designed for distillation with solid state relay (Auber DSPR220 or DSPR400)

I posted everything with pictures and wiring diagrams in a dedicated thread titled "Distillation controllers with both temperature and power control," here's a link,

https://future4200.com/t/distillation-controllers-with-both-temperature-and-power-control/1560

Make sure not to miss my tip on how to lock a set temperature with the DSPR400 (or DSPR220) in distillation mode, it's there with the letter of response I received from Auber describing it as brilliant, made my day.

Best regards, John E Schuyler