Abstract:
This test instrument was designed and constructed to measure the emissivity of thermal radiation of metal. The experimental was divided into two parts. Firstly, the emissivity of thermal radiation of metal was measured by the thermal emissivity measuring instrument which was produced by Devices and Services Co.,Ltd., U.S.A. Secondly, the emissivity of thermal radiation was measured by the instrument designed and constructed by the researcher. Then there was a comparison between the two results of the emissivity of thermal radiation. It was found that the result measured by the researchers instrument had maximum error of 2.64% whereas the other result was standard. This thesis stated this error and explained the improvement of this instrument. Hopefully this thesis would be beneficial for future design and construction of the instrument to measure the emissivity of thermal radiation.