Geophone Cases
	Molded Slip-On Splice
	HBT-3 Hard Body Marsh T

Geo Space offers a variety of land and marsh cases to suit each customer's individual applications. They are constructed from a glass reinforced, thermoplastic resin that provides exceptional resistance to extreme environmental conditions, with high impact resistance even at very low temperatures. Standard case colors are blue and yellow. Each case fits a wide selection of interchangeable spikes and bases, and can be easily assembled and disassembled in the field without special tools.

The PC-901 Marsh Case requires no potting compound. It has an elegantly simple construction, with very few parts and no threaded pieces. It utilizes the patented PCB Anchor* for reliable connection of pigtails to the geophone, with the damping resistor mounted directly on the clad of the PCB Anchor for easy replacement of either the geophone or the resistor. The unique LIM silicone rubber case seal, which retains its flexibility to -50° F, prevents water from penetrating to the basic unit.

The PC-801-LP and PC-801-LPC Land Cases also require no potting compound. The patented PCB Anchor Takeout anchors the leader cable and provides reliable electrical interconnections. It is housed in the LIM silicone rubber case seal in such a manner that even if water, due to wicking from a cut in the leader wire jacket, enters the top cavity of the geophone case, it cannot penetrate to or corrode the basic unit. The large radius cable entry of the case seal reduces cable fatigue for improved field life. The PC-801-LP has a steel base cup with stud, while the PC-801-LPC has a traditional base.

The PC-21 Land Case is designed to handle Geo Space's larger geophone units, with a knot anchored takeout used for extra cable security. This case has been successfully used in a wide variety of field environments throughout the world.

* Patent No. 4594698

	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 X-Phone, GS-30CT, GS-32CT, GS-20DX.
The Geo Space 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.

Inexpensive Quick and easy to install No potting compounds, tape, shrink-tubing or adhesives Molded silicone-rubber boot Waterproof seal around cable entry Uses patented PC board technique for electrical connection of conductors PC boards anchor equal to the breaking strength of the leader cable Temperature change does not affect characteristics of material or waterproof seal Flexible with small outside diameter and smooth curvature Field proven, tested, and accepted

Even under the best field conditions, the use of geophone strings invariably leads to cuts and breaks in the leader cable, making leader repair a necessary part of normal field crew operations. Solutions to this repair problem include soldering the conductors together then covering the jacket either with tape or with a conventional hard plastic splice that has to be filled with a potting compound for sealing. Neither of these techniques is a satisfactory solution to the leader repair problem. Some crews replace sections of the geophone leader as being the only way to make dependable repair. The MS-4 molded slip-on splice is an inexpensive and easy solution to your leader cable repair problem.

The MS-4 molded slip-on waterproof splice is the result of Geo Space's continuing search for applications using the molded silicone-rubber covers or boots and PC boards. The electrical connections are made by soldering the conductors to the PC board. This soldering technique serves a dual function: the electrical design for the PC board assures that correct electrical inner connections are made between the conductors, and the high strength of the PC board provides an anchor that is equal to the breaking strength of the leader cable. The molded silicon-rubber slip-on boot tightly seals all points of the leader cable entry and provides a water seal around the PC board and solder contacts.

Using the PC board for connecting geophones into strings is a Geo Space patented technique (U.S.A. patent number 4,594,698) used in all the Geo Space geophone string assemblies, as well as the use of a molded silicone-rubber seal around the geophone leader cable. Therefore the technology used in the MS-4 molded slip-on waterproof splice is not new, but an extension of a field proven idea that originated with Geo Space. The MS-4 is available for all commonly used sizes and types of leader cable. The PC board can accept either 2, 3, 4, or 6 conductor cable. The slip-on boot has cable entry for .180 to .500 inch diameter cable.

HBT-3 Hard Body Marsh T
	Hard body enclosure with waterproof silicone rubber case seal Accommodates .180, .210, .250 and .310 cable sizes Combination of plastic and silicone rubber impervious to chemicals Easily replaced or repaired - no special tools required PCB anchoring equal to strength of leader wire PCB reduces wiring errors Troubleshooting made easy - removal of top provides clear access to electrical connections on PCB Watertight - tested in excess of 200 ft. Field proven, tested, and accepted