Single Geophone String in Vertical Direction

Various single geophone string in vertical direction for HVSR, MASW, near surface, shallow geological prospecting and deep seismic imaging are available.

single geophone string in vertical direction types ranging from 1Hz to 100Hz with SM4 structure, SM6 structure, 20DX structure, 32CT structure, SG10 structure or GS One structure optional.
Assorted geophone cases suitable for land, snow, desert, marsh and transition zone are available.
Various geophone connectors including but not limited to Split spring connector, Muller clips, Kooter connector, KCL connector, KCK connector, 5515 geophone connector and SH17 WCR are selectable.
Different options for geophone cables(Cable OD, Length or Tensile strength) are available as per client’s request.

Just contact us to get more detailed configurations and 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

Single Geophone String in Vertical Direction Product Parameters

Type	ST-8N (Equivalent to SM-4 8Hz)	ST-10N (Equivalent to SM-4 10Hz)	ST-14N (Equivalent to SM-4 14Hz)	ST-40N (Equivalent to SM-4 40Hz)
Natural frequency (Hz)	8 ± 5%	10±5%	14 ± 5%	40 ± 5%
Open circuit damping	0.337	0.271	0.2	0.62
Damping with calibration shunt	0.6 ± 5%	0.6±5%	0.6 ± 5%	0.648 ± 5%
Calibration shunt resistance(ohms)	2400	1400	640	7500
Open circuit sensitivity (V/m/s)	28.8	28.8	28.8	32.5
Sensitivity with calibration shunt(V/m/s)	24.9±5%	22.7±5%	18.2 ± 5%	30.3± 5%
Coil Resistance (ohms)	375 ± 5%	375±5%	375 ± 5%	540 ± 5%
Harmonic Distortion (%)	＜0.2	≦0.2	＜0.2	＜0.2
Typical Spurious Frequency (Hz)	≧240	≧240	≧240	≧300
Moving Mass ( g )	11.3	11.3	11.6	9.3
Max. coil excursion p-p (mm)	2	2	2	1.8
Max. tilt angle	≦20º	≦20º	≦20º	≦20º
Element Diameter (mm)	25.4	25.4	25.4	26
Element Height (mm)	32	32	32	32
Element Weight (g)	74	74	74	80
Operating Temperature(℃)	-40℃ to + 100℃	-40℃ to + 100℃	-40℃ to + 100℃	-40℃ to + 100℃
Warranty Period	1 year	1 year	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 and physical abuse.

Type	ST-20DX 8hz	ST-20DX 10hz	ST-20DX 14hz	ST-20DX 28hz	ST-20DX 40hz	ST-20DX 60hz	ST-20DX 100hz
Natural frequency ( Hz )	8±5%	10±5%	14±5%	28±5%	40±5%	60±5%	100±5%
Open circuit damping	0.38±5%	0.30±5%	0.22±5%	0.27±5%	0.37±5%	0.52±5%	0.45±5%
Damping with Shunt Resistor	0.71±5%	0.70±5%	0.51±5%	0.552±5%	0.576±5%	0.60±5%	\
Calibration Shunt Resistance(ohms)	1800	1000	1000	1000	1500	1500	\
Open Circuit Intrinsic Voltage Sensitivity(V/m/s)	28.0±5%	28.0±5%	28.0±5%	39.0±5%	42.0±5%	39.0±5%	23.0±5%
Sensitivity with Shunt Resistor(V/m/s)	23.0±5%	20.0±5%	20.0±5%	28.0±5%	30.4±5%	27.0±5%	\
Coil Resistance (ohms)	395±5%	395±5%	395±5%	395±5%	575±5%	668±5%	570±5%
Harmonic Distortion ( % )	≤0.2	≤0.2	≤0.2	≤0.2	≤0.2	≤0.2	≤0.2
Typical Spurious Frequency ( Hz )	≥180	≥200	≥250	≥350	≥380	≥400	≥600
Moving Mass ( g )	11	11	11	11	8.2	6.5	5
Max.coil excursion p-p (mm)	1.5	1.5	1.5	1.5	1.5	1.5	1.5
Max.tilt angle	20º	20º	20º	20º	20º	20º	20º
Element Diameter (mm)	25.4	25.4	25.4	27	27	27	27
Element Height (mm)	33.5	33.5	33.5	33.5	33.5	33.5	33.5
Element Weight (g)	87	87	87	100	95	95	95
Operating Temperature(℃)	-45°C to +80°C	-45°C to +80°C	-45°C to +80°C	-45°C to +80°C	-45°C to +80°C	-45°C to +80°C	-45°C to +80°C
● All parameters specified herein are rated at a temperature 20℃±2℃.
● 1-year limited warranty exclusive of high voltage, lightening and physical abuse.

Type	ST-4.5N( Equivalent to SM-6 B-Coil 4.5hz )
Natural frequency ( Hz )	4.5±10%
Damping	0.6±5%
Coil resistance (ohms)	375±5%
Open circuit sensitivity (V/m/s)	28.8±5%
Harmonic distortion ( % )	≦0.2
Typical spurious Frequency ( Hz )	≧240
Moving Mass ( g )	11.3
Max.coil excursion p-p (mm)	4
Max.tilt angle	20º
Element Diameter (mm)	25.4
Element Height (mm)	36
Element Weight (g)	86
Operating Temperature( ℃ )	-40℃ 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, 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.