A Partlow Chart is a type of chart used to indicate temperature readings in a reefer container. It is specifically designed for monitoring and controlling the temperature inside refrigerated containers, which are commonly used for transporting temperature-sensitive goods. The chart typically consists of a circular or rectangular graph with temperature ranges marked along the axis. By tracking the position of a pointer or a pen on the chart, operators can easily monitor the temperature variations over time. Partlow Charts are valuable tools in ensuring the proper storage and transportation of perishable goods, helping to maintain their quality and integrity throughout the supply chain.