There are three types of thermogravimetry:
*Isothermal or static thermogravimetry: In this technique, the sample weight is recorded as a function of time at a constant temperature.
*Quasistatic thermogravimetry: In this technique,  the sample temperature is raised in sequential steps separated by isothermal intervals, during which the sample mass reaches stability before the start of the next temperature ramp. 
*Dynamic thermogravimetry: In this technique, the sample is heated in an environment whose temperature is changed in a linear manner.