Handy Septum Size Chart
| Instrument | Septum Diameter |
|---|---|
| Agilent | |
| 5880A, 5890, 6850, 6890, 7890, PTV | 11 mm |
| 5700, 5880 | 9.5/10 mm |
| On-Column Injection | 5 mm |
| Bruker/Varian (Injector Type) | |
| Packed Column | 9.5/10 mm |
| 1078/1079 | 10/11 mm |
| 1177 | 9 mm |
| 1075/1077 | 11 mm |
| Finnigan (TMQ) | |
| GC 9001 | 9.5 mm |
| GCQ | 9.5 mm |
| QCQ | 9.5 mm |
| TRACE 2000 | 9.5 mm |
| Gow-Mac | |
| 6890 Series | 11 mm |
| All Other Models | 9.5 mm |
| PerkinElmer | |
| Sigma Series | 11 mm |
| 900, 990 | 11 mm |
| 8000 Series | 11 mm |
| Auto SYS, Auto SYS XL | 11 mm |
| Clarus 590/690 | 11 mm |
| Pye/Unicam | |
| All Models | 7 mm |
| Shimadzu | |
| All Models | Plug |
| SRI | |
| GCs With Heated Inlets | 9.5 mm |
| All Other Models | Plug |
| Thermo Scientific | |
| TRACE 1300/1310, 1600/1610 Series | 11 mm |
| TRACE Ultra GC | 17 mm |
| FOCUS GC | 17 mm |
| GCQ w/TRACE, PTV | 12.7 mm |
| 8000 Series | 17 mm |
| Tracor | |
| 540 | 11.5 mm |
| 550, 560 | 9.5 mm |
| 220, 222 | 12.7 mm |
Restek septa are packaged in ultra-clean blister packs.
Tips for Handling Septa
All septa, regardless of composition, puncturability, or resistance to thermal degradation will fail if they are mishandled. Overtightening a septum nut invariably will reduce septum lifetime by increasing coring/splitting. All septa contain volatile materials (e.g., phthalates) that are released when the septum is heated (septum bleed). Because most GCs are equipped with a septum purge, septum bleed generally will disappear within 30 minutes after installing a new septum and exposing it to normal injector temperatures. All Restek septa are preconditioned and are ready to use without delay—order your Restek septa today at www.restek.com/septa