Distilling Controller for Distillation Process Automation

Starting at: $67.95

  • Model: DSPR220


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Product Description:

DSPR210 is a controller for automating the distillation process. It is to be used with a solid state relay to drive the electric heating element.  It can bring the liquid to the boil point in the maximum speed; then automatically reduce the power to maintain the boil at a desired level; It has a programmable alarm that can be used to notify the operator to remove the foreshots/heads at specific temperature. It also stops the distillation automatically so that the feints/tails will not be collected. The criterial for stopping the distillation can be either a preset temperature, or a preset distillation time. 

This controller was developed based on our Digital SSR Power Regulator and the EZboil controller (DSPR1DSPR120). It provides linear and uniform power output with 1% resolution. The power adjustment is done with a rotary encoder that is easier to operate. The new features of this controller are the higher temperature resolution and the automatic shut off by a temperature setting. The controller offers 0.1-degree resolution which is important for the distillation application. The automatic output power shut off mechanism is latched just like a limit controller. Once it is shut off, the heater will not turn on unless the system is reset.

DSPR220 offers two control modes, distilling mode and mashing mode. In the distilling mode, the controller function as a power regulator as discussed above.  In the mashing mode, the controller function as a temperature controller. It allows the user to set the temperature instead of setting the power. This mode can be used for mashing as well as preheating and stabilizing the reflux column. Its temperature control function utilizes an artificial intelligent algorithm optimized for mashing application. It is easier to understand and more convenient to operate than a PID controller. Regular PID controllers may have overshoot or slow response issues when not properly tuned. However, for most mashing systems, this controller can hold the temperature within one degree right out of the box.  The temperature resolution in mashing mode is 1 degree.


Two versions of the Distilling Controller are offered at this time. DSPR220 is the standard model with one SSR control output.  DSPR400 is the advanced model with two additional programmable relay outputs.  These relays can be programmed to engage at specific temperature or time. They are very versatile and can be used for many different types of applications. Following are some examples.
The relay can be set to synchronize with alarm conditions. If you feel the internal buzzer is not sufficient, you can connect a flashing buzzer to the relay. It allows you to get both audio and visual alarm notification. You can set a specific alarm duration, or add a switch in the loop so that you can disable it at any time. 
The relay can be set to the latching mode and be looped into the control output so that it functions as an over temperature protection mechanism.
The relay can also be set to act at a specific temperature range to control other devices such as a circulation pumps.
Relay #1 can be set in synchronization with the acceleration heating phase of the main control output. User can use it to drive a contactor that is connected to extra heating elements. For a 12KW three heating elements system, user can have two 4kw elements controlled by relay #1, and one 4kw element controlled by a 25A SSR. This configuration reduces the SSR heatsink size for the heat dissipation, making the system more compact and reliable.
Relay #2 can be set in synchronization with the timer for mashing or distilling. So once the boil is complete, a chiller pump can be turned on. 

Application Example for Alcohol Distilling

Set the high power accelerated heating limit to 170.0°F (76.7°C) and power output to be at 100% of the element capacity, set distilling power at 30%. Set the foreshots/heads alarm at 172°F. Set the distillation ending criterial to be either when temperature rise to 175.0 °F or when the time is more than 3 hours. When the controller is powered up, it will heat the wash with full power. After the wash temperature reaches 170°F, the power is automatically reduced to 30%. When temperature reaches 172°F, the alarm will beep four times to notify the operator that temperature is close to the alcohol boil temperature so that he can remove the heads. Soon the temperature rise to 173.0°F, the timer is activated. After distilling for a while the content of alcohol is depleted and temperature starts to rise. Once the temperature reaches 200.0°F, the heater is turned off and the controller will send long beeps and flashing "End" on the display. if the temperature does not rise to 200.0°F after 3 hours, the heater will also be turned off. During the distillation, the user can use the rotary knob to fine tune the boil at any time. The figure below shows how the power is correlated to the temperature and time.


Figure 1. Power output correction with temperature and time.

Input type RTD (Resistance Temperature Detector): Pt100
Accuracy ± 0.2% Full scale
Temperature range -328°F ~ +932°F, -200°C ~ +500°C
Response time ≤ 0.5s (when FILt =1)
Display resolution 1°C or °F for Mashing Mode.  0.1°C or °F for distilling Mode.
SSR output 12VDC, 80 mA. (It can drive up to 6 SSRs in parallel)
Control mode Mashing, Distilling
Alarm function Process high alarm
Power supply 85~260VAC/50~60Hz
Power consumption ≤ 5 Watt
Working Ambient temperature 0~50ºC, 32~122ºF
Front Dimension 48 x 48 mm (1/16 DIN)
Mounting cutout 45 x 45 mm
Length 100 mm from the front panel to the back; 114 mm if include the rotary nub.

1. The temperature sensor is not included. This controller can read PT100 RTD temperature sensor. Here is the link for RTD temperature sensors (Pt100 type) that can be used with this controller.

2. This unit should be used with SSR (see our 5A25A40A80A100A SSR), it's not compatible with solid state voltage regulators (SSVR). 

Please confirm the model number before download your manual. The PIN assignment between DSPR220 and DSPR210 are different.

Click here for DSPR220 instruction manual.
Click here for DSPR400 instruction manual.
Tech Note on Relay 1 for Accelarated Heating.


This product was added to our catalog on Monday 28 December, 2015.

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