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LGT Seismic Geophone
LGT Seismic Geophone
Instruction
LGT seismic geophone element is designed to offer long service life in seismic exploration, its bandwidth is from 10 Hz to 190 Hz in 2D and 3D seismic exploration. and it can be installed in variety of LGT geophone cases.
Specifications

Low and Medium Frequency Geophone Specifications
Type LGT-4.5 LGT-10 LGT-14 LGT-28
Natural Frequency (Hz) 4.5±10% 10 ± 5% 14 ± 5% 28 ± 5%
Open Circuit Damping 0.6 ±10% 0.271 ± 5% 0.2 ± 5% 0.6 ± 5%
Damping with Shunt Resistance   0.6 ± 5% 0.6 ± 5%  
Intrinsic Voltage Senditivity (V/cm/s) 0.288 ± 10% 0.288 ± 5% 0.288 ± 5% 0.31 ± 5%
Sensitivity with Shunt Resistance (V/cm/s)   0.227 ± 5% 0.182 ± 5%  
Coil Resistance 375 ± 5% 375 ± 5% 375 ± 5% 385 ± 5%
Close Circuit Resistance (Ω)   296 ± 5% 236.5 ± 5%  
Harmonic Distortion  ≤0.3% ≤0.2% ≤0.2% ≤0.2%
Typical Spurious Frequency (Hz) ≥180 ≥200 ≥250 ≥400
Moving Mass (g) 11.3 11.3 11.6 10.2
Coil Excursion P-P 4 2 2 1.6
Maintains Fn Specifications to Tilt Angle  ≤10 ≤20 ≤20 90
Core Unit Diameter (mm) 25.4 25.4 25.4 26
Core Unit Height (mm) 36 32 32 32
Core Unit Mass (g) 74 74 74 95
Operating Temperature(℃) -40 to +90 -40 to +90 -40 to +90 -40 to +90
Warranty (year) 1 3 3 3
High Frequency Geophone Specifications
Type LGT-35 LGT-60 LGT-100
Natural Frequency (Hz) 35 ± 5% 60±5% 100±5%
Open Circuit Damping 0.6 ± 5% 0.503±5%
Damping with Shunt Resistance   0.60±5% 0.63±5%
Intrinsic Voltage Senditivity (V/cm/s) 0.325 ± 5% 0.351±5%
Sensitivity with Shunt Resistance (V/cm/s)   0.27±5% 0.25±5%
Coil Resistance 560 ± 5% 2000± 5% 1100± 5%
Close Circuit Resistance (Ω)   600±5% 820±5%
Harmonic Distortion  ≤0.2% <0.2 <0.2
Typical Spurious Frequency (Hz) ≥500  ≥550  ≥600
Moving Mass (g) 9.3 6.5±5% 7.6±5%
Coil Excursion P-P 1.8 1.5 1
Maintains Fn Specifications to Tilt Angle  90 90° 90°
Core Unit Diameter (mm) 26 27 27
Core Unit Height (mm) 32 33.5 33.5
Core Unit Mass (g) 95 95 95
Operating Temperature(℃) -40 to +90 -40 to +90 -40 to +90
Warranty (year) 3 2 2

Frequency Response Curves
 
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