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For example, if multiple piezometers are installed in a borehole, and the distance from the
borehole to the terminal box or datalogger is great, a splice (or junction box) could be made to
connect the individual cables to a single multi-conductor cable. (See Figure 14.) This multi-
conductor cable would then be run to the readout station. For these installations, it is
recommended that the piezometer be supplied with enough cable to reach the installation depth
plus extra cable to pass through drilling equipment (rods, casing, etc.).
The cable used for making splices should be a high quality twisted pair type with 100% shielding
and an integral shield drain wire.
When splicing, it is very important that the shield drain
wires be spliced together.
Splice kits recommended by Geokon incorporate casts that are placed around the splice and then
filled with epoxy to waterproof the connections. When properly made, this type of splice is equal
or superior to the cable itself in strength and electrical properties. Contact Geokon for splicing
materials and additional cable splicing instructions.
Junction boxes and terminal boxes are available from Geokon for all types of applications. In
addition, portable readouts and dataloggers are available. Contact Geokon for specific
application information.
Figure 14 - Typical Multi-Piezometer Installation
