GP-20DX Geophone / Seismometer, geological exploration equipment parts

Model

GP-20DX-10

GP-20DX-10

GP-20DX-14

GP-20DX-28

GP-20DX-40

Natural frequency

8±5% 

10±5%

14±5%

28±5%

40±5%

Open circuit damp

0.38±5%

0.3±5%

0.22±5%

0.27±5%

0.37±5%

Close-circuit damp

0.7±5%

0.75±5%

0.51±5%

0.552±5%

0.576±5%

Open-circuit sensitivity

28±5%

28±5%

28±5%

39±5%

42±5%

Close-circuit sensitivity

(v/m/s)

20±5%

20.1±5%

20.1±5%

28±5%

30.4±5%

Coil  DC resistance

395±5%

395±5%

395±5%

395±5%

575±3.5%

Close-circuit DC resistance

283±5%

283±5%

283±5%

283±5%

415±5%

Core parallel resistance

1000±1%

1000±1%

1000±1%

1000±1%

1500±1%

Harmonic distortion

≤0.2%

≤0.2%

≤0.2%

≤0.2%

≤0.2%

Alias frequency

≥200

≥250

≥300

≥400

≥400

Hanging body weight(g)

11

11

11

11

8.2

Coil Max. displacement(mm)

1.5

1.5

1.5

1.5

1.5

Allowed inclined angle( °)

≤20

≤20

≤20

90

90

Core unit Dia.(mm)

25.4

25.4

25.4

27

27

Core unit height(mm)

32

33

33

33

33

Core unit weight(g)

87

87

87

100

100

Working temperature(℃)

-40-100

-40-100

-40-100

-40-100

-40-100

Working durability

3

3

3

3

3