A Short Walk along the Gravimeters Path

Table 2

Progress in measuring 𝑔(partially compiled after Torge 1989, page 14, figure 1.1 [1]

Type of instrument	Time span	Uncertainty  range	Rate
Reversible pendulum	1817 to1945	4×10^−5to2×10^−6	One order of magnitude/130 years
Spring type gravimeters	1935 to 2010	4×10^−7to3×10^−9	Two orders of magnitude/75 years
Superconducting gravimeters	1965 to 2010	5×10^−10to5×10^−12	Two orders of magnitude/45 years
Absolute gravimeters	1970 to 2010	8×10^−7to2×10^−9	Two orders of magnitude/40 years