| After-sales Service: | Professional Multi-Frequency Geophysical Geophone |
|---|---|
| Warranty: | Professional Multi-Frequency Geophysical Geophone |
| Accuracy: | 2mm |
| Vertical Lines: | 1 |
| Horizontal Line: | 1 |
| 38Hz Vertical Geophone: | Shallow Reflection & Refraction |
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier 
| Model &Specification | CDJ-Z2C | CDJ-Z2.5C | CDJ-Z4 | CDJ-Z4.5 | CDJ-Z10 | CDJ-Z15 | CDJ-Z28 | CDJ-Z30 | CDJ-Z38 | CDJ-Z40 | CDJ-Z60 | CDJ-Z100 | ||
| 2Hz Vertical |
2.5Hz Vertical |
4Hz Vertical |
4.5Hz Vertical |
10Hz Vertical |
15Hz Vertical |
28Hz Vertical |
30Hz Vertical |
38Hz Vertical |
40Hz Vertical |
60Hz Vertical |
100Hz Vertical |
|||
| Natural frequencyFn(Hz) | 2±10% | 2.5±10% | 4±10% | 4.5±10% | 10±5% | 15±5% | 28±5% | 30±5% | 38±5% | 40±5% | 60±5% | 100±5% | ||
| Sensitivity G(v/cm/s) | 2±10% | 0.28±5% | 0.26±5% | 0.30±5% | 0.25±5% | |||||||||
| Coil resistance Rc(KΩ) | 6040±5% | 380±5% | 500±5% | 650±5% | 1060±5% | 1080±5% | ||||||||
| Internal resistance R(KΩ) | 5800±5% | 5650±5% | 345±5% | 335±5% | 310±5% | 415±5% | 560±5% | 800±5% | 1020±5% | |||||
| Damping coefficient Bt: | 0.7±10% | 0.58±10% | 0.62±10% | 0.6±10% | 0.5±5% | |||||||||
| Harmonic distortion D(%) | ≤0.2 | |||||||||||||
| Insulation resistance R(MΩ) | ≥20 | |||||||||||||
| Maximum displacement P-P(mm) | 3 | 2 | ||||||||||||
| Suspension mass M(g) | 60 | 13 | 8.5 | 8 | 6.3 | 5.9 | ||||||||
| Operating temperature(ºC) | -25~+55 | -40~+70 | ||||||||||||
| Size | Core | Diameter(mm) | φ38.5 | φ27.2 | ||||||||||
| Height(mm) | 47 | 34 | 32 | |||||||||||
| Weight(kg) | 0.25 | 85 | 86 | 78 | ||||||||||
| Cover | Diameter(mm) | 50x60 | 45x55 | |||||||||||
| Height(mm) | 87 | 76 | ||||||||||||
| Weight(kg) | 0.48 | 0.51 | 0.31 | 0.247 | ||||||||||
Suppliers with verified business licenses
Audited Supplier 
){kind=link}
){kind=link}