Differential Thermal Analysis (DTA) is similar to Differential Scanning Calorimetry (DSC) .DSC and DTA are thermoanalytical techniques. Both have almost the same applications and usages in analysis, but the techniques involved in the analysis are different. One is based on the temperature difference while the other is based on the heat flow difference.
DTA quantitatively analyze the chemical composition of substances by observing the thermal behavior of a sample which undergoes reactions and phase changes that involve absorption or emission of heat. DTA is suited for the determination of characteristic temperatures. In DSC technique, the difference is calculated between the amount of heat needed to increase the temperature of the sample and the heat required to increase the temperature of the reference. DSC allows for the determination of caloric values such as the heat of fusion or heat of crystallization
DSC and DTA are both used in measuring a glass transition, phase changes, purity evaporation, melting, purity crystallization, sublimation, , pyrolysis
If your DTA transducer giving µV or thermal voltage (or mW after sensitivity calibration) beside ΔT, you can integrate the peak area to obtain the heat of transitions (heat content of peak area either as endothermic or exothermic heat flow variation). In other words transition temperature peak can be used to obtain the transition enthalpy in J/g. Please see the diagram below from Netzsch. And the previous discussions ---> https://www.researchgate.net/post/How_to_Calculate_DTA_in_V and https://www.researchgate.net/post/How_can_I_convert_the_DSC_curve_Heat_Flow_Vs_Time_to_an_enthalpy_curve_Enthalpy_Vs_Time