High-precision DTS defrost sensor for Carrier reefer containers. Compatible with major controller models, including MicroLink 2, MicroLink 2i, and MicroLink 3. The sensor accurately monitors the evaporator temperature to initiate and terminate the defrost cycle timely, preventing system icing and maintaining the pre-set temperature parameters. Additionally, this versatile device can function as an ambient (outdoor) temperature sensor. Featuring a fully sealed protective design, it withstands high humidity, chemical exposures, and wide temperature variations.