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LGT2100 Geophone String
LGT2100 Geophone String

  Instruction:

LGT2100 Geophone String is one kind of three component geophone, which can receive the vibration from 3 direction. LGT2109 can be mounted with 4.5hz seismic geophone to 100hz seismic geophone.*      

  Features:
It features stable performance, high fidelity and consistent quality in conventional  industrial of coal, Petroleum and natual gas exploration. Today 3 component geophone strings are used in a various applications that are far removed from their original applications as earthquake detectors, engineering vabrations, perimeters defensing.
  Suitable  Seismic Geophones:

Type

LGT-20D4.5

LGT-20D10

LGT-20D14

LGT-20D28

Natural Frequency (Hz)

4.5 ± 0.5Hz

10 ± 5%

14 ± 5%

28 ± 5%

Open Circuit Damping

0.7 ± 5%

0.3 ± 5%

0.22 ± 5%

0.27 ± 5%

Damping with Shunt Resistance

 

0.7 ± 5%

0.51 ± 5%

0.552 ± 5%

Intrinsic Voltage Sensitivity (V/cm/s)

0.234 ± 5%

0.28 ± 5%

0.28 ± 5%

0.39 ± 5%

Sensitivity with Shunt Resistance(V/cm/s)

 

0.2 ± 5%

0.2 ± 5%

0.28 ± 5%

Coil Resistance

395 ± 5%

395 ± 5%

395 ± 5%

395 ± 5%

Close Circuit Resistance (Ω)

 

283 ± 5%

283 ± 5%

283 ± 5%

Harmonic Distortion 

≤0.3%

≤0.2%

≤0.2%

≤0.2%

Typical Spurious Frequency (Hz)

≥180

≥250

≥300

≥400

Moving Mass (g)

11.3

11

11

11

Coil Excursion P-P

1.5

1.5

1.5

1.5

Maintains Fn Specifications to Tilt Angle 

≤10

≤20

≤20

90

Core Unit Diameter (mm)

25.4

25.4

25.4

27

Core Unit Height (mm)

33.5

33.5

33.5

33.5

Core Unit Mass (g)

87

87

87

100

Operating Temperature()

-40 to +90

-40 to +90

-40 to +90

-40 to +90

Warranty (year)

1

3

3

3

 

Type

LGT-20D40

20DX60

20DX100

Natural Frequency(Hz)

40 ± 5%

60±5%

100 ± 5%

Open Circuit Damping

0.37 ± 5%

0.503±5%

0.464 ± 5%

Damping with Shunt Resistance

0.576 ± 5%

0.60±5%

0.65 ± 5% (1000 Ω)

Intrinsic Voltage Sensitivity(V/cm·s-1)

0.42 ± 5%

0.351±5%

0.612 ± 5%

Sensitivity with Shunt Resistance (V/cm·s-1)

0.304 ± 5% (1500)

0.27±5% (2000)

0.32 ± 5% (11000 Ω)

Close Circuit Resistance (Ω)

 

 

 

Coil Resistance (Ω)

575 ± 5%

600±5%

1004± 5% 

Distortion (%)

≤0.2%

0.2

0.2%

Typical Spurious Frequency (Hz)

≥400

 ≥550

≥ 600

Moving Mass (g)

8.2

6.5±5%

7.6±5%

Coil Excursion P-P

1.5

1.5

1.5mm

Maintains Fn Specifications to Tilt Angle

90

90°

90°

Core Unit Diameter (mm)

27

27

27

Core Unit Height (mm, )

33.5

33.5

33.5

Core Unit Mass (g)

100

95

95

Operating Temperature()

-40 to +90

-40 to +90

-40 to +90

Warranty(year)

3

2

2

 

*Longet Equipment Co., Ltd can customize different kind of seismic geophones to meet all the customer's various applications.

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