This Avantco 44904100589 produce temperature probe is a direct replacement for the one that came with your Avantco blast chiller / freezer. The temperature controller inside your Avantco refrigeration equipment relies on a functioning sensor to accurately read and adjust the temperature. Replace a worn or damaged probe right away to ensure your unit is operating at food safe temperatures. It's compatible with Avantco SF-3 and SF-5 blast chillers / freezers.