Geophone 28Hz with Reinforced Land Case

Geophone 28Hz with Reinforced Land Case is an ideal choice for shallow seismic survey and it is mostly widely used in coalmine geological prospecting and exploration with the following features:

Good parameter consistency.
Firm mechanism structure.
Excellent sealability and stability.
Vertical geophone, horizontal geophone are available which are also suitable for three component applications.
Reinforced land case and spike are specially designed for rugged fields.
Assorted geohone connectors and geophone cable are available.
1-year limited warranty on basic element exclusive of high voltage, lightening or physical abuse.

We supply geophone 28Hz in the condition of geophone element, single land cased geophone, geophone array and multi geophone string with KCK connector, KCL connector, 408 connector, Kooter connector, MP16 connector, Split spring connector and Mueller clip connector optional as the lead connector. Geophone leader cable from O.D 4.6mm to O.D 7.8mm available.

Click here and download data sheet of 28hz geophones or contact us and get more detailed information.

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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

Data Sheet of Geophone 28Hz Sensor

Type	ST-20DX, 28hz (Equivalent to GS-20DX,28hz)
Natural frequency ( Hz )	28±5%
Coil Resistance (ohms)	395±5%
Open circuit damping	0.27±5%
Damping with Shunt Resistor	0.552±5%
Calibration Shunt Resistor(ohms)	1000
Open Circuit Intrinsic Voltage Sensitivity(V/m/s)	39.0±5%
Sensitivity with Shunt Resistor(V/m/s)	28.0±5%
Harmonic Distortion ( % )	≤0.2
Typical Spurious Frequency ( Hz )	≥350
Moving Mass ( g )	11.0
Max.coil excursion p-p (mm)	1.5
Max.tilt angle	20º
Element Diameter (mm)	25.4
Element Height (mm)	33.0
Element Weight (g)	100.0
Operating Temperature(℃)	-45℃ to + 100℃
Warranty Period	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.