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.

AGPtek® 1/16 DIN Digital PID Temperature Controller SNR & Alarm SNR (1 alarm)

Inkbird ITC-308 – Dual Stage Digital Temperature Controller | Review | Inkbird Deals