LGT-20D Low Frequency Seismic Geophone

Seismic Geophone

Instruction:

LGT-20D Low Frequency Seismic Geophone is compatible with all field data acquisition systems. All operating parameters are confirmed with a proprietary computerized test system during the manufacturing process. This can help the customers to carry on the geological explore in any corner in the world and obtain the detail and correct geological data.

Features:

It features stable performance, high fidelity and consistent quality in conventional industrial of coal, Petroleum and natual gas exploration.LGT-20D Low Frequency Seismic Geophone 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

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

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