While mass changes are frequently typical of transitions in thermal analysis, they are generally quite diffuse. By contrast, the enthalpy associated with the mass change is often much more clearly defined. Simultaneous analysers combine the Thermogravimetic measurement with either Differential Thermal Analysis (DTA), or better still with Dynamic Scanning Calorimetry (DSC). This allows much better resolution, especially where small or multiple reactions occur.

The unique top-loading balance design from Netzsch offers the optimum resolution, stability and freedom from contamination by evolved gases.

• The test conditions for STA are perfectly identical to those for TG and DSC (same atmosphere, flow rate, vapor pressure on the sample, heating rate, thermal contact to the sample crucible and sensor, radiation effect, etc.).
• The analyzability of the signals is improved, since two or more sets of information concerning sample behavior are always simultaneously available (differentiation between phase transformation and decomposition, between addition and condensation reactions, recognition of pyrolysis, oxidation, and combustion reactions, etc.)
• Since the early years of its existence, NETZSCH-Gerätebau GmbH has given high priority to the development and continuing improvement of its STA instruments; these have today taken on a market-leading position as a result of their optimised technology.
• The respective instrument and application standards for TGA and DSC (see respective sections) are of course also met by NETZSCH STA instruments.