CDJ Series Digital Seismic Geophones

Medium–High Frequency (vertical and horizontal) Geophones

Parametertype name

CDJ-Z/P4

CDJZ/P4.5

CDJ-Z/P10

CDJ-Z/P15

CDJ—Z/P28

CDJ-Z/P30

CDJ—Z/P38

Natural Frequency (Hz)

4±10%

4.5±10%

10±5%

15±5%

28±5%

30±5%

38±5%

Sensitivity G
(v/cm.s-1)

0.28±5%

0.26±5%

Coil Resistance Rc(Ω)

365±5%

365±5%

365±5%

500±5%

500±5%

650±5%

Internal Resistance
(Ω)

345±5%

335±5%

310±5%

415±5%

415±5%

560±5%

Damping Coefficient Bt

0.7±10%

0.58±10%

0.58±10%

0.62±10%

0.6±10%

0.6±10%

Harmonic Distortion D

≤ 0.2

Insulating Resistance
Ri (MΩ)

≥ 20

Coil’S Maximum Displacement P-P(mm)

2

Suspension Mass( g )

13.2

12.8

8.6

7.9

Working Temperature
(°C)

— 40 ~ + 70

Weight ( g )

255

Medium–High Frequency (vertical and horizontal) Geophones

Parametertype name

CDJ-Z/P40

CDJ-Z/P60

CDJ—Z/P80

CDJ—Z/P100

Natural Frequency (Hz)

40±5%

60±5%

80±5%

100±5%

Sensitivity G
(v/cm.s-1)

0.26 ±5%

0.3 ±5%

0.25 ±5%

0.25 ±5%

Coil Resistance Rc(Ω)

690±5%

1030 ±5%

735 ±5%

1080 ±5%

Internal Resistance
(Ω)

580 ±5%

800 ±5%

685 ±5%

1020 ±5%

Damping Coefficient Bt

0.6 ±10%

0.6 ±10%

0.55 ±10%

0.5 ±10%

Harmonic Distortion D

≤ 0.2

Insulating Resistance
Ri (MΩ)

≥ 20

Coil’S Maximum Displacement P-P(mm)

2

Suspension Mass( g )

7.9

5.9

5.5

5.2

Working Temperature
(°C)

— 40 ~ + 70

Weight ( g )

255

Low-Frequency (vertical, horizontal and three-component ) Geophones

Parametertype name

CDJ-Z1/P1/S1

CDJ-Z1A/P1A/S1A

Natural Frequency (Hz)

1±10%

Coil Resistance Rc(Ω)

3400±10%

3500±10%

Open Circuit Sensitivity
G (v/cm/s)

2±10%

6.7±10%

Closed Circuit Sensitivity
(v/cm/s)

1.83±10%

6.4±10%

Internal Resistance R(Ω)

3100±10%

3300±10%

Open Circuit Damping Coefficient Bt

0.32±10%

Closed Circuit amping Coefficient

0.43±10%

Insulating Resistance
Ri (MΩ)

≥ 10

Coil’S Maximum Displacement P-P (mm)

6

Suspension Mass ( g )

770

Working Temperature (°C)

—25 ~ +55

Weight (K g )

8.15

3.4

10

8.15

3.4

10

Low-Frequency (vertical, horizontal and three-component ) Geophones

Parametertype name

CDJ—Z2A/P2A/S2A

CDJ-Z2B/P2B/S2B

CDJ-Z2C/P2C/S2S

Natural Frequency (Hz)

2±10%

Sensitivity G
(v/cm.s-1)

1.2±10%

3.5±10%%

2±10%

Coil Resistance Rc(Ω)

1600±5%

13000±5%

6040±5%

Internal Resistance
(Ω)

1540±5%

12800±5%

5800±5%

Damping Coefficient Bt

0.7±10%

Harmonic Distortion D

≤ 0.2

Insulating Resistance
Ri (MΩ)

≥ 20

Coil’S Maximum Displacement P-P(mm)

3

Suspension Mass( g )

60

Working Temperature
(°C)

—25 ~ +55

Geophone Element Weight (K g )

0.25

Low-Frequency (vertical, horizontal and three-component ) Geophones

Parametertype name

CDJ—Z2.5A/P2.5A/S2.5A

CDJ-Z2.5B/P2.5B/S2.5C

CDJ-Z2.5C/P2.5C/S2.5S

Natural Frequency (Hz)

2.5±10%

Sensitivity G
(v/cm.s-1)

1.2±10%

3.5±10%

2±10%

Coil Resistance Rc(Ω)

1600±5%

13000±5%

6040±5%

Internal Resistance
(Ω)

1540±5%

12800±5%

5650±5%

Damping Coefficient Bt

0.7±10%

Harmonic Distortion D

≤ 0.2

Insulating Resistance
Ri (MΩ)

≥ 20

Coil’S Maximum Displacement P-P(mm)

3

Suspension Mass( g )

60

Working Temperature
(°C)

—25 ~ +55

Geophone Element Weight (K g )

0.25

Low-Frequency (vertical, horizontal and three-component ) Geophones

Parametertype name

CDJ—Z3A/P3A/S3A

CDJ-Z3B/P3B/S3B

CDJ-Z3C/P3C/S3S

Natural Frequency (Hz)

3±10%

Sensitivity G
(v/cm.s-1)

1.2±10%

3.5±10%

3±10%

Coil Resistance Rc(Ω)

1600±5%

13000±5%

6040±5%

Internal Resistance
(Ω)

1540±5%

12800±5%

5650±5%

Damping Coefficient Bt

0.7±10%

Harmonic Distortion D

≤ 0.2

Insulating Resistance
Ri (MΩ)

≥ 20

Coil’S Maximum Displacement P-P(mm)

3

Suspension Mass( g )

60

Working Temperature
(°C)

—25 ~ +55

Geophone Element Weight (K g )

              0.25