What specific property did Gauss's instrument first quantify around 1832/1833?

Answer

Absolute magnetic intensity

Gauss's breakthrough involved creating the first magnetometer capable of determining the absolute magnetic intensity, shifting terrestrial magnetism study from qualitative observation to quantitative science.

What specific property did Gauss's instrument first quantify around 1832/1833?
inventionmeasurementintensityMagnetismmagnetometer