How to cap and uncap sorbent tubes using the CapLok tool

The CapLok™ tool is designed to simplify the capping and uncapping of sorbent tubes, and to prevent overtightening.

Except during sampling and tube preparation, sorbent tubes should always be capped. Markes recommends brass or aluminium long-term storage caps for both short-term storage (up to 3 days) and long-term storage (for which they are independently validated for up to 27 months).