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Reinforced Geophone 8Hz for Land, Desert, Snow, Marsh and TZ

Reinforced geophone 8Hz (ST-8N) is designed equivalent to SM-4 structure, which is for low weight, long field-life,and ultra reliable performance. Precision engineered components and computerized test equipment ensure consistency in manufacture and operation throughout and beyond the limited replacement guarantee period of three years.

  • Precision machine, rotating coil design.
  • Precious metal contacts for consistent reliable &prolonged field performance.
  • Could be supplied as geophone sensor, land case geophone or muti geophone string.
  • Assorted geophone lead-in cable and geophone connectors(Split spring connector, mueller clips, Kooter, KCL, KCK and ect.) are available.
  • Different type of geophone cases which are suitable for land,desert, snow, marsh and transition zone are available with steel spike or brass spike optional.
  • Vertical and Horizontal elements are available and also suitable for 3-C applications.
  • Widely used in structrual and industrial vibration monitoring systems.
  • 3-year limited warranty on basic element exclusive of high voltage, lightening or physical abuse.
  • For 2-D and 3-D seismic exploration with bandwidth from 10Hz up to 190Hz.
  • ST-20DX reinforced geophone 8Hz is also available.

Click here and download data sheet of reinforced geophone 8Hz or contact us to get special discounts.

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For any inquiries, please contact with our Marketing Team at or Supporting Team at


Reinforced Geophone 8Hz Product Parameters


(Equivalent to SM-4, 8Hz)


(Equivalent to GS-20DX,8Hz)

Natural frequency ( Hz )8 ± 5%8±5%
Open circuit damping0.3370.38
Damping with calibration shunt0.6 ± 5%0.71±5%
Calibration shunt resistance(ohms)24001740
Open circuit sensitivity (v/m/s)28.8±5%28.0±5%
Sensitivity with calibration shunt(v/m/s)24.9±5%23.0±5%
Coil Resistance (ohms)375 ± 5%395±5%
Harmonic Distortion ( % )<0.2≤0.2
Typical Spurious Frequency ( Hz )≧240≥180
Moving Mass ( g )11.311.0
Max. coil excursion p-p (mm)2.01.5
Max. tilt angle20º20º
Element Diameter (mm)25.425.4
Element Height (mm)3233.5
Element Weight (g)74g87.0
Operating Temperature(℃)-40℃ to + 100℃-40℃ to + 100℃
Warranty Period3 years3 years
●  All parameters specified herein are rated at a temperature 20℃±2℃.

●  3-year limited warranty on basic element exclusive of high voltage, lightening or physical abuse.


– Other type of geophones are also available: SM-4 Equivalent, SM-6 Equivalent, SM-24 Equivalent, SG10 Equivalent, GS-20DX Equivalent, GS-32CT Equivalent, GS ONE Equivalent, 1Hz, 2Hz, 2.5Hz, 3Hz, 4Hz, 4.5Hz, 5Hz,8Hz, 10Hz, 14Hz, 15Hz, 28Hz, 30Hz, 38Hz, 40Hz, 60Hz,80Hz and 100Hz.

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