- Fritless sparger: Compared to a frit sparger, the fritless sparger may be the better choice when a water sample has a tendency to foam. This sparger is not appropriate for soil samples, which tend to clog the capillary tube. Available in 1/2" and 3/4" mount sizes.
- Disposable (needle tubes): The most practical choice for soil (and other solid or semi-solid) samples, these tubes permit easy sample loading and inexpensive disposal. Available only in 3/4" mount size, a tube can be used on the 7695A Purge & Trap concentrator with the adapter (to convert from 7695A Purge & Trap 1/2" to this 3/4" size).
- Needle sparger with foam trap: This sparger is designed for samples that foam, particularly if the foaming cannot be controlled by a fritless sparger. Available only in 1/2" mount size.
- Frit sparger: This is the most efficient design in terms of purging, and it is the standard choice for clean drinking water. Available in 1/2" and 3/4" mount sizes.
Note: The 7695A Purge & Trap concentrator has a 1/2" mount, and the automatic sampler has a 3/4" mount. An adapter is available to mount 3/4" glassware on the 7695A Purge & Trap concentrator, but there is no adapter for using 1/2" glass on the automatic sampler.