After testing the FLIR ONE Thermal Camera, we determined that it can be used to perform this popular lab activity instead of using the Surface Temperature Sensor. The data indicate that the fingertip warms much faster than the skin of the bicep after cooling, as shown in the pictures above. To determine the actual rate of warming, data from the Vernier Thermal Analysis app were exported to Graphical Analysis, where a linear fit could be applied. This analysis showed that the fingertip warmed almost twice as fast as the skin of the bicep after 60 s of recovery.
A version of this experiment, written for the FLIR ONE Thermal Camera and the Vernier Thermal Analysis app for iOS, along with updated versions using the Surface Temperature Sensor for Logger Pro and LabQuest App, are available for download.