simultaneous technique (adj.)

in thermal analysis
https://doi.org/10.1351/goldbook.12306
Indicates the measurement of two or more properties of a single sample at the same time.
Note: A hyphen is used to separate the abbreviations of the techniques; for example, simultaneous measurement of mass and heat flow rate (thermogravimetric analysis and differential scanning calorimetry) would be TGA-DSC.
Source:
PAC, 2014, 86, 545. (ICTAC nomenclature of thermal analysis (IUPAC Recommendations 2014)) on page 549 [Terms] [Paper]