High Frequency Geophone

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Application

High frequency geophones are mainly used for deep seismic observation, advanced prospecting, natural earthquake investigation, measuring and monitoring of micro-vibration of bridges, dams, railways and highways etc.

Specification 1. Three component geophone

Type

CDJ-S4

CDJ-S4.5

CDJ-S10

CDJ-S15

CDJ-S28

CDJ-S30

CDJ-S38

CDJ-S40

CDJ-S60

CDJ-S100

4Hz

4.5Hz

10Hz

15Hz

28Hz

30Hz

38Hz

40Hz

60Hz

100Hz

Natural frequency Fn (Hz)

4±10%

4.5±10%

10±5%

15±5%

28±5%

30±5%

38±5%

40±5%

60±5%

100±5%

Sensitivity G(v/cm/s)

0.28±5%

0.26±5%

0.30±5%

0.25±5%

Coil resistance Rc(KΩ)

380±5%

500±5%

650±5%

1060±5%

1080±5%

Resistance R(KΩ)

345±5%

335±5%

310±5%

415±5%

560±5%

800±5%

1020±5%

Damping coefficient Bt:

0.7±10%

0.58±10%

0.62±10%

0.6±10%

0.5±5%

Harmonic distortion D(%)

≤0.2

Insulation resistance R(MΩ)

≥20

Maximum coil displacement P-P (mm)

Suspension weight M (g)

8.5

6.3

5.9

Operating temperature (℃)

-40~+70

Size

Core

Diameter (mm)

φ27.2

Height (mm)

Weight (mm)

Sheath

W×L (mm)

Height (mm)

Weight (kg)

1.2

2. Vertical geophone

Type

CDJ-Z4

CDJ-Z4.5

CDJ-Z10

CDJ-Z15

CDJ-Z28

CDJ-Z30

CDJ-Z38

CDJ-Z40

CDJ-Z60

CDJ-Z100

4Hz

4.5Hz

10Hz

15Hz

28Hz

30Hz

38Hz

40Hz

60Hz

100Hz

Natural frequency Fn (Hz)

4±10%

4.5±10%

10±5%

15±5%

28±5%

30±5%

38±5%

40±5%

60±5%

100±5%

Sensitivity G(v/cm/s)

0.28±5%

0.26±5%

0.30±5%

0.25±5%

Coil resistance Rc(KΩ)

380±5%

500±5%

650±5%

1060±5%

1080±5%

Resistance R(KΩ)

345±5%

335±5%

310±5%

415±5%

560±5%

800±5%

1020±5%

Damping coefficient Bt:

0.7±10%

0.58±10%

0.62±10%

0.6±10%

0.5±5%

Harmonic distortion D(%)

≤0.2

Insulation resistance R(MΩ)

≥20

Maximum coil displacement P-P (mm)

Suspension weight M (g)

8.5

6.3

5.9

Operating temperature (℃)

-40~+70

Size

Core

Diameter (mm)

φ27.2

Height (mm)

Weight (mm)

Sheath

W×L (mm)

45x55

Height (mm)

Weight (kg)

0.31

247

3. Horizontal geophone

Type

CDJ-P4

CDJ-P4.5

CDJ-P10

CDJ-P15

CDJ-P28

CDJ-P30

CDJ-P38

CDJ-P40

CDJ-P60

CDJ-P100

4Hz

4.5Hz

10Hz

15Hz

28Hz

30Hz

38Hz

40Hz

60Hz

100Hz

Natural frequency Fn (Hz)

4±10%

4.5±10%

10±5%

15±5%

28±5%

30±5%

38±5%

40±5%

60±5%

100±5%

Sensitivity G(v/cm/s)

0.28±5%

0.26±5%

0.30±5%

0.25±5%

Coil resistance Rc(KΩ)

380±5%

500±5%

650±5%

1060±5%

1080±5%

Resistance R(KΩ)

345±5%

335±5%

310±5%

415±5%

560±5%

800±5%

1020±5%

Damping coefficient Bt:

0.7±10%

0.58±10%

0.62±10%

0.6±10%

0.5±5%

Harmonic distortion D(%)

≤0.2

Insulation resistance R(MΩ)

≥20

Maximum coil displacement P-P (mm)

Suspension weight M (g)

8.5

6.3

5.9

Operating temperature (℃)

-40~+70

Size

Core

Diameter (mm)

φ27.2

Height (mm)

Weight (mm)

Sheath

W×L (mm)

45x55

Height (mm)

Weight (kg)

0.31

Feature

With great parameter consistency and firm structures, high frequency geophones feature good tightness and light weights. The output of each geophone is separate, with high sensitivity, little distortion, reasonable damping coefficient and high resolution, capable of satisfying multicomponent seismic data collection requirements. High frequency geophones are widely used in public facility safety monitoring, such as bridges and railway tunnels, for risk prospecting.