The 4.5Hz 3C Geophone (P/N: ST-4.5N-3C) is an ideal instrument to perform HVSR, MASW and Vibration Analysis. 3units. of 4.5Hz geophone sensors are properly coupled and embedded in the reinforced 3C geophone case with X,Y&Z axis and delivered with standard soil spikes with length of 75mm. The 4.5Hz 3C Geophone could be supplied with split … Continue reading 4.5Hz 3C Geophone