- Long travel version of the ST-0.75A geophone, with Max.coil excursion p-p 6.0mm.
- ST-0.75A Geophone with or without metal case are available.
- Single Vertical Geophone, Single Horizontal Geophone or Triaxial Geophone are optional.
- Widely used in passive seimsic survey, deep seismic exploration, engineering pulse meansurement, long time micro-seismic monitoring,etc.
- Rugged construction with precious-metal, rotating-coil contacts.
- High sensitivity of 600.0V/m/s.
- 1-year limited warranty on basic element exclusive of high voltage, lightening or physical abuse.
Type | ST-0.75A |
Natural frequency ( Hz ) | 0.75±10% |
Damping | 0.32±10% |
Sensitivity (80hz) (V/m/s) | 600±10% |
DC Resistance (Ω) | 35000 ±10% |
Distortion ( % ) | <=0.2 |
Insulation Resistance (MΩ) | ≥50 |
Moving Mass ( g ) | 770 |
Max. coil excursion p-p (mm) | 6.0 |
Element Diameter (mm) | 65.0 |
Element Height (mm) | 107.0 |
Element Weight (g) | 1400.0 |
Operating Temperature(ºC) | -40ºC to + 90ºC |
Working Direction | Vertical or Horizontal |
All parameters specified herein are rated at a temperature 20ºC±2ºC. 1-year limited warranty exclusive of high voltage, lightening or physical abuse. |





