DT325/35 Soil Sampling System

DT325 Soil SampleFor trouble-free sampling in saturated sands and plastic clays ... use the DT325 & DT35 Dual Tube Sampling System.

Geoprobe Systems® has invested countless hours of engineering and field testing into creating the DT325 & DT35 dual tube systems.  The result is a system that allows practical and efficient dual tube sampling using Geoprobe® 3.25 in & 3.5 in. probe rods.  The DT325 is primarily used under Geoprobe® models 66, 77, & 78 Series machines.  The DT35 is used primarily under the Geoprobe®  Model 8040DT.

DT325 / DT35 Dual Tube Sampling System Advantages & Specifications
  • Larger Diameter Core ( 1.85 in. )
  • Liner is housed in a steel sheath providing sample integrity
  • PVC liner comes with integrated Core Catcher
  • Set up to 1.5 in. Geoprobe® Prepacks

The dual tube’s unique combination of cutting shoe, sheath, and sample retainer allows efficient recovery of samples in formations ranging from plastic clays to saturated sands.  It’s designed to quickly recover samples well below the water table.  Problems with liner failure or lodging are virtually eliminated with this system.

Use with Light-Weight 1.25 in. Center RodsLiners for these systems are clear PVC with an integral core catcher fused to one end.  This configuration maximizes sample recovery while minimizing entrance losses.  It’s also proven to be very robust in use.  The DT325 Liner Cutter, permits safe, simple, and quick cutting of the liners for sample logging. These Soil Sampling Systems are robust and durable. 

A Liner Retainer, with threads identical to the Sheath Drive Head, is stronger and prevents the retainer from fusing to the Sample Sheath. The thread pattern on the Liner Retainer also made it possible to put the same thread on both ends of the Sample Sheath which allows for more even thread wear when the sheath is turned end-for-end thus extending the sample sheath life.

DT325 Sample Sheath
The simple design of the DT325 Sample Sheath, which is available in 3 lengths, features the same internal thread pattern on both ends. This allows the user to maximize the thread life by rotating which end of the sample sheath is towards the top of the tool. There is no window sheath option for this system.