GS-3C Land Case For 3 Component Geophone Arrays

Pointed case top indicates where horizontal geophone lines up with cable.
Geophone retainer cavities are integral parts of case.
Large level bubble is easy to center.
Case is self-clamping by design.
Up to 4 spikes assure secure ground coupling.
Accommodates arctic base.
Fits GS-30CT, GS-32CT, GS-20DX.

The GS-3C Waterproof Land Case orients three geophones in the standard V/H1/H2 configuration for three component recording. The geophones are secured in specially designed retainer cavities that are built into the case. The axis of each geophone is clearly indicated on the case top, which also houses a large, easy-to-read level bubble. The case bottom accommodates up to 4 spikes for maximum stability when planted, or can be fitted with an arctic base.

The GS-3C Land Case is well suited for both 3-D and 4-D applications. It is constructed from strong thermoplastic resins that maintain long term integrity even in the harshest of environments. The patented PCB Anchor/Takeout accepts up to 9-conductor leader and provides reliable electrical contact and strong cable anchoring. The molded silicone-rubber case seal prevents any water penetration and eliminates the need for internal potting.

GS-32 CT Specifications

Description	Specification @ 25˚C	Tol +/-
Natural Frequency (Fn):	10 Hz	2.5%
Coil Excursion P-P	> .040 in, > .102 cm MIN
	> .060 in, > .152 cm MAX
Clean Band Pass (Spurious Response)	> 250 Hz (Typical)
DC Resistance (DCR)	395 ohms	2.5%
Intrinsic Voltage Sensitivity (G)	.698 V/i/s, .275 V/cm/s
Open Circuit Damping (Bo)	.316
Damping w/1000 ohm Shunt	.70	2.5%
Sensitivity @ 70% Damping	.500 V/in.s, .197 V/cm/s	2.5%
Moving Mass (M)	.395 oz., 11.2 g	2.5%
Harmonic Distortion
With coil to case velocity of 0.7 in/sec (1.8 cm/sec) P-P @ 12 Hz	<0.10%
String, 12 series, damped 0.70	<0.03% (Typical)
With coil to case displacement of 0.0093 in (0.0236 cm) P-P @ 10 Hz	<0.20%
Dimensions
Weight	3.03 oz., 86 g
Diameter	1.00 in., 2.54 cm
Height (less stud & terminals)	1.30 in., 3.30 cm

Specifications are subject to change without notice.