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.
1-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 sales@seis-tech.com or Supporting Team at info@seis-tech.com.

MAIN TECHNICAL PARAMETERS

Reinforced Geophone 8Hz Product Parameters

Type	ST-8N (Equivalent to SM-4, 8Hz)	ST-20DX,8Hz (Equivalent to GS-20DX,8Hz)
Natural frequency ( Hz )	8 ± 5%	8±5%
Open circuit damping	0.337	0.38
Damping with calibration shunt	0.6 ± 5%	0.71±5%
Calibration shunt resistance(ohms)	2400	1740
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 )	11.3	11.0
Max. coil excursion p-p (mm)	2.0	1.5
Max. tilt angle	20º	20º
Element Diameter (mm)	25.4	25.4
Element Height (mm)	32	33.5
Element Weight (g)	74g	87.0
Operating Temperature(℃)	-40℃ to + 100℃	-40℃ to + 100℃
Warranty Period	1 year	1 year
● All parameters specified herein are rated at a temperature 20℃±2℃. ● 1-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.