Three Component Borehole Geophone
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| CDJ-DJ | CDJ-JG | CDJ-JF | ||
| Electromagnetic borehole geophone | Piston borehole geophone | Unattached borehole geophone | ||
| Frequency (Hz) | 4HZ-100HZoptional | 4HZ-100HZoptional | 1HZ-100HZoptional | |
| Minimum appropriate borehole diameter (mm) | φ70-φ120 | φ50-φ110 | ||
| Operating temperature (℃) | 25~55 | 25~55 | 25~55 | |
| Size | Diameter (mm) | φ55 | φ50 | φ45 |
| Height (mm) | 465 | 500 | 300 | |
| Weight (kg) | 60m10kg, 120m14kg | 60m12kg, 120m17kg | 60m60kg, 120m10kg | |
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