Low frequency and high sensitivity geophone 1Hz  (P/N: ST-1A) in  vertical direction (P wave) and horizontal direction (S wave) are available. They are suitable for deep seismic exploration, engineering pulse measurement and other vibration analysis. Long travel version of the ST-1A geophone, with Max. coil excursion p-p 6.0mm. Special orientations upon request beyond the normal … Continue reading High Sensitivity Geophone 1Hz