Surface geophone B

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Overview
Rotary Coil Structure Geophone – Series B
Series B seismic geophones are designed primarily for petroleum and seismic exploration. They feature a medium-frequency response, high signal fidelity and tightly controlled parameters (tolerance within ±5%). The dual-coil rotary design improves common-mode noise rejection and allows the coil to rotate freely through 360° to reduce surface-wave interference.

Product Category
Medium Frequency (4.5 Hz–14 Hz)

Parameter Table
Parameter/Mode | PS-8E（20℃） | PS-10B（20℃） | PS-14B（20℃）
Natural Frequency (Hz) | 8±0.5 | 10±5% | 14±5%
Coil Resistance (Ω) | 375±5% | 375±5% | 375±5%
Sensitivity (V/m/s) | 28.8±5% | 28.8±5% | 28.8±5%
Sensitivity With Shunt Resistor (V/m/s) | 23.04±5%（1500Ω） | 22.7±5%（1400Ω） | 18.2±5%（640Ω）
Damping | 0.315±5% | 0.271±5% | 0.20±5%
Damping With Shunt Resistor | 0.715±5%（1500Ω） | 0.60±5%（1400Ω） | 0.601±5%（640Ω）
Distortion (%) | ≤0.2 | ≤0.2 | ≤0.2
Spurious Frequency | ≥160 | ≥180 | ≥200
Max. Motion (mm) | 2 | 2 | 2
Moving Mass (g) | 11 | 11.3 | 11.6
Dimensions (d×h) mm | 25.4×32 | 25.4×32 | 25.4×32
Temperature Range (℃) | -40 to +70 | -40 to +70 | -40 to +70
Warranty Period (Year) | 1 | 1 | 1
Weight (g) | 73.5 | 73 | 73

*Damage resulting from high voltage or physical damage is excluded from the warranty coverage.
*Product specifications may be updated without prior notice.

Characteristics / technical specifications

• Type: Rotary-coil geophone with dual-coil structure and 360° freely rotating coil.
• Application: Petroleum and seismic exploration; suitable for varied field environments.
• Frequency range / Series designation: B Series (medium-frequency family).
• High signal-to-noise ratio, minimal phase difference and high dynamic resolution.
• Operating temperature range: -40℃ to +70℃ for broad environmental suitability.
• Available models and key parameters: see Parameter Table for PS-8E, PS-10B and PS-14B.
• Shunt resistor options change sensitivity and damping (values shown in Parameter Table).
• Physical dimensions (diameter × height): 25.4 × 32 mm; moving mass approx. 11–11.6 g depending on model.
• Maximum motion: 2 mm.
• Warranty period: 1 year (does not cover damage from high voltage or physical damage).