Johnson Single Stage Temperature Controller

Now you can precisely control the temperature of your fermentation, or a pump on your All-Grain System! You can change from cooling to heating mode directly from the digital control panel. The unit features an adjustable differential down to within one degree in both heating and cooling modes. This means you can precisely control an environment to within one degree of your set point. The included sensor probe monitors the temperature while the digital readout displays it in either Fahrenheit or Celsius. The sensor probe is 1/4 in diameter.