An Electron Cyclotron Emission (ECE) heterodyne radiometer and a Thomson Scattering (TS) system were used to measure the electron temperature (Te) evolution in plasmas of the Rijnhuizen Tokamak Project (RTP) during the abrupt loss of energy confinement in high density limit disruptions with unprecedented high resolution. Index Terms - Tokamaks, major density limit disruptions, major disruptions, energy quench, magneto hydrodynamic instabilities.