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.
Natural Frequency : 4.5 } .75 Hz, 8 } .75 Hz, 10 } .75 Hz, 14 } .75 Hz
Coil Resistance @ 25C } 5% : 380 Ohms
Intrinsic Voltage Sensitivity with 380 Ohm Coil } 10% : 0.81 V/in/sec (.32 V/cm/sec)
Normalized Transduction Constant (V/in/sec) : 042 (sq.root of Rc)
Open Circuit Damping : 0.34 } 20% (4.5Hz), 0.39 } 10% (8Hz), 0.32 } 10% (10Hz) 0.23 } 10% (14Hz)
Damping Constant with 380 Ohm Coil : 762 (4.5Hz), 602 (8Hz), 482 (10Hz), 344 (14Hz)
Optional Coil Resistances } 5% : 56, 160 Ohms
Moving Mass } 5% : 23.6 g (4.5Hz), 16.8 g (8Hz), 16.8 g (10Hz), 16.8 g (14Hz)
Typical Case to Coil Motion P-P : 0.07 in (0.18cm)
Harmonic Distortion with Driving Velocity of 0.7 in/sec (1.8 cm/sec) P-P : N/S (4.5Hz), 0.2% or less @ 12Hz (8Hz, 10Hz, 14Hz)
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
Chart for Seismic Detector Response Curve Output VS. Frequency (GS-11D @ 4.5 Hz @ 380 Ohms & GS-11D @4.5 Hz @ 4000 Ohms, GS-11D @ 10Hz @ 380 Ohms).
Cases Available
PC-21 Land Case
Specifications are subject to change without notice.