Geophones GS-11D

GS-11D

Rotating Coil Geophone

  • Field proven design
  • Shock resistant, rotating dual coil construction
  • Gold plated contacts for positive electrical connection
  • Precision springs, computer designed and matched
  • Full one year warranty

The GS-11D is a high output, rotating coil geophone designed and built to withstand the shocks of rough handling. The precision springs of this field proven geophone are computer designed and matched to optimize performance specifications even under the most extreme conditions.

Gold plated contacts assure positive electrical connections. The Geo Space manufacturing process includes checking all geophone operating parameters with the ATS, an automated computerized test system.

Natural frequencies are 4.5, 8, 10 and 14 Hz, with standard coil resistance of 380 ohms. The PC-21 Land Case is used with the GS-11D geophone.

Cases Available
PC-21 Land Case

Spec Sheet:

GS-11D Specifications

Natural Frequency
4.5 ± .75 Hz
8 ± .75 Hz
10 ± .75 Hz
14 ± .75 Hz
Coil Resistance @ 25°C ± 5%
——380 Ohms ——
Intrinsic Voltage Sensitivity with 380 Ohm Coil ± 10%
——.81 V/in/sec (.32 V/cm/sec) ——
Normalized Transduction Constant (V/in/sec)
——042 (sq.root of Rc) ——
Open Circuit Damping
.34 ± 20%
.39 ± 10%
.32 ± 10%
.23 ± 10%
Damping Constant with 380 Ohm Coil
762
602
482
344
Optional Coil Resistances ± 5%
——4,000 Ohms ———
Moving Mass ± 5%
23.6 g
16.8 g
16.8 g
16.8 g
Typical Case to Coil Motion P-P
.07 in
(.18 cm)
.07 in
(.18 cm)
.07 in
(.18 cm)
.07 in
(.18 cm)
Harmonic Distortion with Driving Velocity of 0.7 in/sec (1.8 cm/sec) P-P
N/S
——0.2% or less ——
@ 12 Hz @ 12 Hz @ 12 Hz
Dimensions
Height (less terminals*)
———1.32 in (3.35 cm) ———
Diameter
———1.25 in (3.18 cm) ———
Weight
———3.9 oz (111 g) ———

*Terminal height is .135 inches
Specifications are subject to change without notice.

GS-11D Seismic Detector Response Curve
Output vs. Frequency Chart (GS-11D @ 4.5 Hz @ 380 Ohms)

GS-11D Seismic Detector Response Curve
Output vs. Frequency Chart (GS-11D @ 4.5 Hz @ 4000 Ohms)

GS-11D Seismic Detector Response Curve
Output vs. Frequency Chart (GS-11D 10 Hz @ 380 Ohms)

Specifications are subject to change without notice.

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