A Hot Point Sensor is a compact Transient Plane sensor measuring 3×3 mm in dimension, designed for attachment to a Transient Hot Bridge instrument. Its purpose is to assess the thermal conductivity of small samples, such as individual coffee beans or peanut beans, and to measure anisotropic materials.

Recent advancements in technology have led to the miniaturization of electronic devices, including the development of micro Resistance Temperature Detectors (mRTDs). These mRTDs are well-suited for flexible measurements of surface temperatures. Additionally, they serve as thermal transport properties sensors by enabling localized heating of the surrounding medium for analysis. When paired with an appropriate working equation, a suitable type of mRTD opens up new possibilities for applications at a “small volume scale.” This extends the potential for diverse applications in this realm.