The Micro-QTTM Valve is designed exclusively for “through the valve” sampling . This valve is optimized for volatile or even light semivolatile compounds when performing rapid sampling. Like the Micro-QT2TM Valve below, the Micro-QTTM Valve is compatible with all existing Entech sampling devices by simply adding a female QT to ¼” adapter (PN 30-22800).
The Micro-QT2TM Valve is a two-piece valve that can be removed in the field to draw in a sample “around the valve” without requiring a separate sampling device. This allows recovery of the heavier semivolatile compounds that might otherwise condense in the valve on the way into the canister. The ability to sample around the valve is unique to the Micro-QT2TM valve design. This valve can also be sampled “through the valve” using a Restricted or Time Integrated Sampler.
The HDS Micro-QT2TM Valve is a two-piece valve that can be removed in the field to perform time integrated sampling from hours to weeks without requiring a separate sampling device.