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Products
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GS-32CT
GS-30CT
Close Tolerance Geophone
The GS-30CT represents the ultimate refinement in geophone design to date. This new geophone is offering heretofore unattainable geophone-to-geophone uniformity, distortion reduced by a factor of 2.5 and tighter tolerance on geophone parameters:
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New standard
Channel-to-channel uniformity and elimination of self-generated noise and distortion is the essence of seismic data. Towards this end, the performance of the GS-30CT is clearly unsurpassed. It is a field-proven match for the most advanced 24-bit Data Acquisition Systems.
3 Year Warranty
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| GS-30CT Specifications |
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| Specifications calculated at 25°C. Orientation is Vertical to 20°. Maintains all specifications at Vertical to 20° tilt. Exception: Harmonic Distortion at 12 Hz (Vertical only). |
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| Frequency |
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| Natural Frequency (Fn): |
10 Hz ± 2% |
| Typical Spurious Frequency: |
> 160 Hz |
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| Resistance |
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| Standard Coil Resistance: |
395 ohms ± 2% |
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| Distortion |
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| Harmonic distortion with coil to case velocity of 0.7 in/sec (1.8 cm/sec) @ 12 Hz and coil to case displacement of 0.0093 in (0.0236 cm) P-P @ 12 Hz |
<0.08% |
| With coil to case displacement of 0.0093 in (0.0236 cm) P-P @ 12 Hz |
<0.12% |
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| Sensitivity |
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| Intrinsic Voltage Sensitivity (G): |
.698 V/in/s, .275 V/cm/s |
| Sensitivity @ 70% Damping |
.500 V/in/sec) (.197 V/cm/sec)± 2% |
| Normalized Transduction Constant: |
.0351 sq.root of DCR; V/in/s .0138; sq.root of DCR; V/cm/s |
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| Damping |
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| Open Circuit Damping (Bo) |
.316 |
| Shunt Resistance for Damping Calibration for 395 ohm coil: |
60% damping ± 2%: 1500 ohms
70% damping ± 2%: 1000 ohms |
| Damping Constant (BcRt) |
536 |
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| Physical Specifications |
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| Moving Mass(M) |
.395 oz., 11.2 g ± 2% |
| Case to Coil Motion P-P: |
.060 in (.152 cm) |
| Operating and Storage Temperature: |
−45°C to +100°C |
| Dimensions (less terminals*) |
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| Height |
1.30 in (3.30 cm) |
| Diameter |
1.00 in (2.54 cm) |
| Weight |
3.03 oz (86 g) |
| * terminal height is .16 in (.41 cm) |
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| Cases Available: |
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| PC-801-LP Land Case |
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| PC-801-LPC Land Case |
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| PC-901-LP Marsh Case |
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| Specifications are subject to change without notice. |
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Click HERE to load chart for Seismic Detector Response Curve Output VS. Frequency. (115 KBytes)
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