Modern thermogravimetric devices are connected to a computer that determines the highest temperature for analysis, and also regulates the heating rate and gas passage rate. During the analysis process, types of gases enter into the sample space as required, and the sample is isolated from the outside. Often nitrogen gas is used since it does not cause oxidation (and in this case, consideration must be given to isolating the crucible so that it is in a closed space and surrounded by nitrogen gas).