Thomas Scientific offers a large selection of ferrules made from PTFE, Graphite, Vespel® and Vespel/Graphite composites. Ferrule sizes refer to the size of the fittings into which they fit; they are not the diameter of the ferrule. (For example, 1/16" ferrules are 1/8" diameter.)
Please Note for all Ferrules:
- 0.4 mm ID ferrules fit 0.25 mm ID capillary columns
- 0.5 mm ID ferrules fit 0.32 mm ID capillary columns
- 0.8 mm ID ferrules fit 0.53 mm ID capillary columns
- “Straight” ferrules are used for packed columns
100% PTFE FERRULES
- Least expensive
- Completely inert
- Upper temperature limit - 250°C
Ferrules of 100% PTFE conform well to the shape of the column on compression. Low upper temperature limit and poor cold flow properties are their drawback. They can be reused if handled carefully. One piece design requires no back ferrule.