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LGT2112 Geophone String
LGT2112 Geophone String

  Instruction:

LGT2112 Triaxial Geophone String (3-componentconsist of one vertical geophone and two horizontal geophones, one meter cable, Mueller Connectors. LGT2112 can be switched to different kind of waterproof connectors, and it can be mounted 4.5hz to 100hz geophone.

     
  Features:
It features stable performance, high fidelity and consistent quality in conventional  industrial of coal, Petroleum and natual gas exploration. LGT2112 geophones 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 ± 0.5

10 ± 5%

14 ± 5%

28 ± 5%

Open Circuit Damping

0.6 ± 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)

0.288± 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

375 ± 5%

395 ± 5%

395 ± 5%

395 ± 5%

Close Circuit Resistance (Ω)

 

283 ± 5%

283 ± 5%

283 ± 5%

Harmonic Distortion 

≤0.6%

≤0.2%

≤0.2%

≤0.2%

Typical Spurious Frequency (Hz)

≥150

≥250

≥250

≥350

Moving Mass (g)

11.3

11

11

11

Coil Excursion P-P

4.0

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)

36

33.5

33.5

33.5

Core Unit Mass (g)

81

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

LGT-20D60

LGT-20D100

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% (1500 Ω)

Intrinsic Voltage Sensitivity(V/cm/s)

0.42 ± 5%

0.39±5%

0.612 ± 5%

Sensitivity with Shunt Resistance (V/cm/s)

0.304 ± 5% (1500)

0.27±5% (2000)

0.32 ± 5% (1500 Ω)

Close Circuit Resistance (Ω)

 

 

 

Coil Resistance (Ω)

575 ± 5%

668±5%

808± 5% 

Distortion (%)

≤0.2

0.2

0.2

Typical Spurious Frequency (Hz)

≥400

 ≥550

≥ 600

Moving Mass (g)

8.2

6.5

7.6

Coil Excursion P-P (mm)

1.5

1.5

1.5

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

98

98

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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