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CDJ low-frequency geophones, 1Hz, 2Hz, 2.5Hz or 3Hz, are widely used in deep seismic prospecting, earthquake monitoring, microseismometry in engineering, surface wave survey and low frequency measurement in other fields.
SPECIFICATIONS
CDJ-Z2.5C | CDJ-P2.5C | CDJ-S2.5C | CDJ-Z3C | CDJ-P3C | CDJ-S3C | |
Vertical | Horizontal | 3-C | Vertical | Horizontal | 3-C | |
Nature Frequency Fn (Hz) | 2.5±10% | 2±10% | ||||
Sensitivity in Open Circuit G (v/cm/s) | ||||||
Sensitivity in Shunt G (v/cm/s) | 2±10% | 2±10% | ||||
Damp in Open Circuit Bt | ||||||
Damp in Shunt Bt | 0.7±10% | 0.7±10% | ||||
Coil Resistance Rc (Ω) | 6040±10% | 6040±5% | ||||
Resistance R (Ω) | 5650±10% | 5500±5% | ||||
Insulation Resistance R (MΩ) | ≥20 | ≥20 | ||||
Harmonic Distortion D (%) | ≤0.2 | ≤0.2 | ||||
Coil to Case Movement P-P (mm) | 3 | 3 | ||||
Suspended Mass M (g) | 60 | 60 | ||||
Operating Temperature (°C) | -25~+55 | -25~+55 | ||||
Coil diameter (mm) | Ø38.5 | Ø38.5 | ||||
Coil Height (mm) | 47 | 47 | ||||
Coil Weight (mm) | 0.25 | 0.25 | ||||
Case Diameter (mm) | 55x70 | 55x70 | 128 | 55x70 | 55x70 | 128 |
Case Height (mm) | 87 | 80 | 134 | 87 | 80 | 134 |
Weight (g) | 0.48 | 0.48 | 2.35 | 0.48 | 0.48 | 2.35 |
2.5-3Hz Geophone