The Hioki LR843220 is a handheld 10-channel data logger especially designed for heat flow measurement. The Heat Flow Logger is ideal for evaluating insulation performance and analyzing the causes of temperature change. The LR8432-20 is a heat flow logger that visualizes quantities of heat. By using a heat flow sensor to visualize movements of thermal energy (heat flows) and quantities of thermal energy, you can obtain data that serves as a leading indicator of changes in temperature.