Temperature Controller

When an experiment calls for precise temperatures, a proportional-integral-derivative (PID) temperature controller is a great tool to have. Below is a design for building your own PID temperature controller, using only off the shelf parts. The design allows for a single controllable output, with a heat only functionality, using a type K thermocouple for temperature measurement. *Caution* The design below uses 110 V electricity, familiarize yourself with all necessary aspects of electrical work first. Reach out to a licensed electrician if in doubt.  

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Front

Front view of CN 7800 omega temperature controller panel mounted in project box with two fuses and a switch

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Back

Back view showing three prong female receptacle, panel mounted grommet for 110 V line in and type K thermocouple jack (yellow)

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Inside

Inside wiring of PID temperature controller. Solid State Relay (SSR, white) shown in middle attached to finned heat exchanger.

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Wiring Diagram

Wiring Diagram for PID temperature controller with single heating only output.

Parts List

Miniature Batch Reactor

The mini-kickass 9000 provides a simple and cost effective design for a miniature batch reactor, made using only off-the-shelf parts. The reactor consists of a miniature glass vial (5 mL), sealed with a rubber septum and plastic cap, that can be magnetically stirred. The design avoids the use of silicone oil or sand, relying on a mechanically embedded thermocouple to provide accurate and rapid temperature control (coupled with PID temperature controller above). Heating is accomplished using an electrical band heater clamped around an aluminum block, all encased within an insulated environment, providing rapid and accurate heating rates. *Caution* Always be aware of any of the risks associated with chemical reagents and the reaction to be conducted in such a design, as well as chemical compatibility with any of the wetted parts. 

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Cutout

Profile view of mini-kickass 9000 design, illustrating the various components embedded within the insulated shell.

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Assembled

Fully assembled design with type K thermocouple and glass reactor in place. Black and white wires for power to electrical band heater.

Top View

Top view of machined aluminum block.

Side View

Side view of machined aluminum block.

Parts List