The Güralp 6T is ideally suited to rapid installations in medium noise sites. The 6T’s high-gain feedback loop eliminates mechanical non-linearity and minimises resonances in the spring system. The design has carefully avoided low-frequency vibration, the lowest spurious vibration is a barely measurable 440 Hz. The perfect companion for the Kelunji EchoPro or Gecko seismographs. A digital output version of the 6T is also available – the 6TD.