- 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. | |













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