Johnson Controls A419 Digital Temperature Controller - Pre-Wired 120V

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The Johnson A419 Digital Temperature Controller is the industry standard for precision thermal management in home and commercial brewing. This unit comes pre-wired for "plug-and-pl ay" operation, allowing you to easily convert a standard refrigerator or freezer into a precise fermentation chamber or kegerator. Featuring a wide setpoint range and an adjustable differential, it provides superior control over your cooling and heating equipment, ensuring your beer ferments at the exact temperature required for consistent quality. Brewery Setup Tip: For the most accurate readings, tape the temperature probe to the side of your fermenter and cover it with a piece of foam insulation; this ensures the controller measures the liquid temperature rather than the air inside the fridge. The A419 features a compressor delay function to protect your refrigeration unit from "short-cycling," which can lead to premature motor failure. Show more