HECHT CPS Containment Sampling Stick

The HECHT CPS Containment Sampling Stick is a mobile, disposable arrangement for taking a powder sample through the liner of a container. It is intended for situations where opening the container or transferring material to a separate enclosure would create an unwanted exposure or contamination route.

How the sampling sequence works

HECHT describes a four step sequence. An anti crease ring first smooths the liner. A vacuum lance then fixes the disposable sampler to the liner. The lance pierces the liner so the sample can be removed. The filled sample is finally sealed and separated.

This sequence keeps the sampling interface attached to the liner during collection. The disposable product path is intended to reduce cleaning between sampling operations and limit cross contamination.

Containment claim and its limits

HECHT states that CPS can be used for containment duties up to OEB 5. OEB is a banding approach, not a universal performance value. A project must translate the material hazard into a defined exposure target and confirm that the complete procedure, connection, handling and disposal steps meet that target.

The PBV video demonstrates the handling sequence. It does not replace exposure measurement, a site risk assessment or the current manufacturer instructions.

Questions for a project review

• Which material and exposure target apply.
• Which container and liner construction will be sampled.
• How much sample is required and from which location.
• How representativeness will be established.
• How the sample will be sealed, labelled and transferred.
• How used components will be contained and disposed of.

Use the current HECHT documentation for product compatibility and operating steps. Develop the sampling plan separately so that the collected material supports the intended analytical decision.

Separate containment performance from sample representativeness

The CPS can control the connection through which a sample is withdrawn, but it cannot determine whether that sample represents the lot. The sampling plan must justify the container, location, timing and mass selected. FDA guidance for component sampling calls for representative, scientifically sound plans that consider variability and the confidence required from the result.

Containment validation addresses a different question. It should cover attachment to the liner, piercing, withdrawal, sealing, separation and disposal, including foreseeable operator errors. The stated OEB duty is a manufacturer claim for the offered arrangement; a project needs a material-specific exposure target and evidence that the complete procedure meets it.

Commissioning evidence

Before routine use, confirm liner compatibility, sample recovery, seal integrity, labelling and transfer to the laboratory. Train operators on the sequence and on recovery from a failed seal or damaged liner. Where exposure is critical, include suitable occupational-hygiene verification rather than judging containment from appearance alone.