U.S. Patent No. 5,186,263

The most frequently used direct push soil sampler. . . the Macro-Core® Soil Sampling system. This 1.5-inch diameter, piston-operated sampler features a positive release system that eliminates the uncertainty of continuous sampling! When the stop-pin is released, the user retracts the extension rod string which carries the released stop-pin and the piston-rod right into the operator's hand.

Other benefits of this new system are numerous. With a lightweight piston tip assembly, sample compression is minimized during retrieval. An O-ring on the tip ensures that the sampler remains sealed until the desired sampling depth is reached. Other features include increased durability, user friendly, easy to decon, and easy to maintain.

The Macro-Core® system is also versatile. While sampling loose, difficult-to-sample soils, use the MC stop-pin coupler. The piston rod and stop-pin are removed in this process which enhances sample recovery. The stop-pin coupler usually is not necessary when sampling in stronger, more consolidated formations, where sample recovery is not a problem.

• Positive release system eliminates the uncertainty of continuous sampling.
• Sample compression is limited due to the lightweight piston tip.
• Stop-pin coupler is available for sampling loose soils.
• 1.5-in. diameter.
• Available for 4-, 3-, and 2-foot Macro-Core® sample tube lengths.
• Few parts to decon. Few parts to maintain.
• One sampler - two sampling options: Closed-Piston or Open-Tube.

MC Sampler Tube lengths:
60 in. MC Sample Tube (4899)
48 in. Sample Tube (AT8522)
36 in. Sample Tube (AT8320)
24 in. Sample Tube (AT8220)
1m Sample Tube (AT8420)

Macro-Core® is a Registered Trademark of Kejr, Inc.