EGL EQUIPMENT SERVICES CO.,LTD
Professional Geophone and Hydrophone Supplier
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Seismic Geophone 4.5Hz,375ohms. Vertical Direction, Horizontal Direction and 3D Structure available.
Type: 4.5Hz-I
Natural Frequency ( Hz ): 4.5 ± 10%
Coil resistance(Ω): 375 ± 5%
Damping: 0.6 ± 5%
Open circuit intrinsic voltage sensitivity ( v/m/s ):28.8 v/m/s ± 5%
Harmonic distortion( % ):≦0.2%
Typical Spurious Frequency (Hz ):≧150Hz
Moving Mass ( g ):11.3g
Typical case to coil motion p-p ( mm ):4mm
Type: 4.5Hz-II
Natural Frequency ( Hz ): 4.5± 5%
Coil resistance(Ω): 375± 5%
Damping: 0.56± 5%
Open circuit intrinsic voltage sensitivity ( v/m/s ):28.8 v/m/s ± 5%
Harmonic distortion( % ):≦0.3%
Typical Spurious Frequency (Hz ):≧140Hz
Moving Mass ( g ):11.1g
Typical case to coil motion p-p ( mm ):3mm