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Glass is far inferior to paper, plastic and Styrofoam in terms of insulation. Thermal conductivity in terms of BTU/(feet - hour - degrees F) is 1.82 for glass, 0.09 for paper, 0.06 for Styrofoam. The conductivity of plastics varies depending on the materials: for polypropylene and polycarbonate, the thermal conductivity values are 0.69 and 0.35, respectively.
The output signal of the thermal conductivity sensor is affected by the operating temperature. Maximum output is at 600Â°C; output at 200Â°C drops by 70%. A simple resistor network provides a voltage output equal to the range of 0â130 g/m 3 at 60Â°C.