Recommendation for kiln control


Here is a list of parts that you need.
1) A programmable controller with ramp/soak function. Model number SYL-2352P
SYL-2352P

2) A solid state relay (SSR). The SSR needs to be able to handle the current of your heater. Most buyers use either a 25 A SSR or a 40 A SSR. For some larger oven or kiln with multiple heating elements, multiple SSRs are used by paralleling the inputs of the SSR together. Our SSR are listed at
25A SSR
40A SSR

3) A high temperature probe. We have one sealed high temperature probe can work a maximum of 2000F. It is good for glass kiln. It is listed at
WRNK-191

For some ceramic kiln, 2000F might not be high enough. Here is the sensor for it
TC-K-KLN

4) Heat Sink.
Heatsink for 25A SSR
Heatsink for 40A SSR

5) A project box, switch, and fuse that can be found from you local Radio Shark store.


Also, you can click HERE for the details about how to upgrade kiln with PID controllers.


Note:
For Kiln that draws more than 25 A, many people prefer to use an electromechanical switching devices, such as a contactor or a mercury switch, instead of SSR. This is because removing the heat generated from SSR becomes an important issue for high current SSR. If the SSR gets over heat, it will fail. When an electromechanical switch fails, it normally ends up open circuit. The heating will stop. But when the SSR fails, it normally ends up short circuit. The heating will continue without stop. That can lead to a mess. That is the disadvantage of SSR. The advantage of SSR is infinite life time (if used properly) and precise temperature control (because it can be switched at high speed). If you want to use electromechanical relay instead of SSR, or your kiln has a contactor switch and you want use it instead of a SSR, you can eliminate item “2)” and change the controller to SYL-2342P.
If your kiln already has a thermocouple that is in good condition, you can eliminate item “3)”.
Wiring diagram.

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