We customized the RTD module, which comprised six customizable metal boxes and six temperature controllers, where each metal box equipped with a PT100 RTD, to sense temperatures in the bottom part of hazardous industrial wastes. Next, we embedded six customizable metal boxes in the surface of the indoor floor and installed six temperature controllers at a lower position near the center of the interior wall of the front end vertical wall. Mathematically, the relationship between resistance and temperature of the PT100 RTD can be expressed as the following Eq. (1):