Dual Alarm PID Temperature Controller
PID Temperature Controllers can be used in conjunction with a relay and a temperature probe to control the your kegerator and fermentation temps. You can also integrate a PID controller into your brew system to control mash temps and more.
Dual Digital Display PID Temperature Controller SSR(2 Alarms)
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I’ve used this same PID for two temp controllers. Here’s a video on how I set mine up.