Refrigerator or Freezer Thermostat (Temperature Controller)
This thermostat, with a 5 foot extendable stainless steel sensor, is perfect for controlling the temperature of your freezer,  refrigerator, air conditioner, or heater for Fermentation or lagering.  Not affected or damaged by electrical grid surges and lightning strikes, or power outages - like a digital thermostats are!  Easy to use, just plug it in, and plug the appliance you want to control into the back of the box.