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A digital temperature controller from Johnson Controls with a load of features! Johnson Controls has been a major name in temperature control for years, and many homebrewers have used their analog controller with great success for fermentation control. Now, we are proud to bring you the A421, a digital temperature controller with an easy-to-read LCD display. This controller features a thermoplastic enclosure and A99 temperature sensor. It has a wide (1 to 30F or C) differential adjustment range that provides a tight control on your temperatures. It also has a adjustable anti-short cycle display that ensures that the output relay remains off for a time delay set by the user. This helps to avoid hard starts, overload outages and equipment wear. With a lockable front panel touchpad, this is a great digital temperature controller for an affordable price!

Product Features

  • Easy-to-read front panel back lit display makes programming and keeping an eye on temperatures a snap!
  • Features a wide setpoint temperature range (-40F to 212F)
  • Adjustable anti-short cycle delay (0 to 12 minutes in 1 minute increments) helps to avoid hard starts, overload outages and equipment wear
  • High-impact thermoplastic corrosion-resistant enclosure.
  • Lockable front panel touchpad for tamper-free temperature control!
  • Single-stage temperature controller with lengthy 8 ft. probe
  • Standard 120v power cord included, pre-wired.

Product Video

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