Ultrasonic geophone / seismometer, geological exploration e

Model

SG-SM-24

SG-CT32

SG-SG10

Natural frequency

10±2.5%

10±2.5%

10±2.5%

Open circuit damp

0.25+5%

0.36±2.5%

0.68±2.5%

Close-circuit damp

0.6+5%/-0%

0.686+5%/-0%

0.7±2.5%

Open-circuit sensitivity

28.8±2.5%

27.5±25%

27.5±25%

Close-circuit sensitivity

(v/m/s)

22.8+5%

20.9+5%

19.7±2.5%

Coil DC resistance

375±25%

395±2.5%

395±2.5%

Close-circuit DC resistance

293/273

283±2.5%

Core parallel resistance

1339/1000±1%

1000±1%

Harmonic distortion

0.1%

0.1%

0.075%

Alias frequency

≥240

≥250

≥240

Hanging body weight(g)

11

11.2

8.4

Coil Max. displacement(mm)

2.0

1.5

1.8

Allowed inclined angle( °)

≤10

≤10

15

Core unit Dia.(mm)

25.4

25.4

27.4

Core unit height(mm)

32

33

32

Core unit weight(g)

74

74

78

Working temperature(℃)

-40-100

-40-100

-40-100

Working durability

3

3

3