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As an essential element of any GC system, we carry a wide selection of high quality septa for your laboratory applications. We offer Septa by Agilent Technologies, Thermo Fisher, SGE and other leading manufacturers. High-quality and affordable alternatives are available in the form of our own brand Altmann Analytik. Click here for GC Ferrules.

Questions about our products? Our expert team will advise you on all questions.

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GC Septa

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  1. Agilent Technologies

    Non-Stick BTO septa, 11mm, 50 pcs.

    Regular Price: €91.00

    Special Price €88.27

    SKU: AG5183-4757
    In Stock
  2. Agilent Technologies

    Septa for screw top caps, certified, PTFE/red silicone, 9mm, 100 pcs.

    Regular Price: €16.00

    Special Price €15.52

    SKU: AG5182-0731
    In Stock
  3. Agilent Technologies

    Non-Stick Adv.Green Septen 11 mm diameter, 50Stck

    Regular Price: €84.00

    Special Price €81.48

    SKU: AG5183-4759
    In Stock
  4. Agilent Technologies

    No-Stick Adv Green Inlt septa 11 mm diameter, 100 pcs.

    Regular Price: €145.00

    Special Price €140.65

    SKU: AG5183-4759-100
    In Stock
  5. Agilent Technologies

    Non-Stick Long Life Einl-Sept. 11 mm diameter, 50St

    Regular Price: €106.00

    Special Price €102.82

    SKU: AG5183-4761
    In Stock
  6. Agilent Technologies

    BTO Inlet-septa n. klebend 11 mm diameter, 400 St.

    Regular Price: €610.00

    Special Price €591.70

    SKU: AG5190-3157
    In Stock
  7. Agilent Technologies

    CrossLab BTO inlet septa 9 mm diameter, 50pk

    Regular Price: €88.00

    Special Price €85.36

    SKU: AG8010-0217
    In Stock
  8. SGE

    HT septa, 6 mm, 50 pc/pak

    €87.20
    SKU: SG0418999
    In Stock
  9. Waters

    SEPTA PTFE/SILICONE 100PK

    €25.00
    SKU: WTWAT058874
    In Stock
  10. Waters

    SEPTA/PTFE/SILICONE 8MMPRE 100PK

    €30.00
    SKU: WTWAT058876
    In Stock
  11. Hamilton

    GC Septa, 212°C, PTFE/Silicone Rubber, ø 11 mm, 3.18 mm thick, 12 pc/PAK

    Regular Price: €24.17

    Special Price €22.96

    SKU: HT75807
    In Stock
  12. SGE

    GP septa, 5 mm, 50 pc/pak

    €44.10
    SKU: SG041820
  13. SGE

    GP septa, 11 mm, 50 pc/pak

    €51.30
    SKU: SG041826
  14. SGE

    GP septa, 11,5 mm, 50 pc/pak

    €51.30
    SKU: SG041827
  15. SGE

    MN septa, 12,5 mm, 48 pc/pak

    €86.10
    SKU: SG0418503
  16. SGE

    MN septa, 11 mm, 50 pc/pak

    €86.10
    SKU: SG041856
  17. SGE

    HT septa, 12,5 mm, 24 pc/pak

    €51.30
    SKU: SG0418992
  18. Supelco

    THERMOGreen LB-2 for SHIMADZU PK/50

    €149.00
    SKU: SU20633
  19. Supelco

    Septum Thermogreen LB-2, 9 mm diameter, PK50

    €146.00
    SKU: SU28021-U
  20. Hamilton

    GC Septa, 212°C, PTFE/Silicone Rubber, ø 12.7 mm, 3.18 mm thick, 12 pc/PAK

    Regular Price: €24.17

    Special Price €22.96

    SKU: HT75806
  21. Hamilton

    3-Layer GC Septa, 200°C, laminated Silicone Rubber, ø 6,35 mm, 3.81 mm thick, 12 pc/PAK

    Regular Price: €15.70

    Special Price €14.91

    SKU: HT76001
  22. Agilent Technologies

    septa, PTFE/Sil. w., 8,7 mm diameter, 100Stck. pcs..

    Regular Price: €22.00

    Special Price €21.34

    SKU: AG5182-0730
  23. Agilent Technologies

    Non-Stick BTO Inlet septa 11 mm diameter, 100 pk

    Regular Price: €168.00

    Special Price €162.96

    SKU: AG5183-4757-100
  24. Agilent Technologies

    CrossLab BTO inlet septa 9 mm diameter, 100pk

    Regular Price: €156.00

    Special Price €151.32

    SKU: AG8010-0218
  25. Agilent Technologies

    CrossLab BTO inlet septa 11 mm diameter, 50pk

    Regular Price: €88.00

    Special Price €85.36

    SKU: AG8010-0223
  26. Thermo Fisher Scientific

    Septum BTO INJ SSL 17 pk10

    €21.27
    SKU: TF31303210
  27. SGE

    GP septa, 6 mm, 50 pc/pak

    €44.10
    SKU: SG041821
  28. SGE

    GP septa, 7 mm, 50 pc/pak

    €44.10
    SKU: SG041822
  29. SGE

    GP septa, 8 mm, 50 pc/pak

    €44.10
    SKU: SG041823
  30. SGE

    GP septa, 9 mm, 50 pc/pak

    €44.10
    SKU: SG041824
  31. SGE

    GP septa, 9,5 mm, 50 pc/pak

    €44.10
    SKU: SG0418240
  32. SGE

    GP septa, 10 mm, 50 pc/pak

    €44.10
    SKU: SG041825
  33. SGE

    GP septa, 12,5 mm, 48 pc/pak

    €51.30
    SKU: SG041828
  34. SGE

    GP septa, 15 mm, 48 pc/pak

    €65.60
    SKU: SG041829
  35. SGE

    EC septa, 6 mm, 50 pc/pak

    €52.30
    SKU: SG041841
  36. SGE

    EC septa, 7 mm, 50 pc/pak

    €52.30
    SKU: SG041842
  37. SGE

    EC septa, 8 mm, 50 pc/pak

    €52.30
    SKU: SG041843
  38. SGE

    EC septa, 10 mm, 50 pc/pak

    €52.30
    SKU: SG041845
  39. SGE

    MN septa, 5 mm, 50 pc/pak

    €86.10
    SKU: SG041850
  40. SGE

    MN septa, 11,5 mm, 50 pc/pak

    €86.10
    SKU: SG0418501
  41. SGE

    MN septa, 17 mm, 48 pc/pak

    €140.50
    SKU: SG0418505
  42. SGE

    MN septa, 9 mm, 50 pc/pak

    €86.10
    SKU: SG041854
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Choosing the right GC septum

Septa must withstand high chemical and mechanical loads during everyday use in analytics. Especially the application in combination with GC systems requires a high thermal load capacity of the material. A selection of the most common GC septa can be found below.

Material Max. operating temperature Features
BTO 400 °C (300 °C for 17 mm septa)

Low bleeding

Optimized for GC/MS systems

TR-Green 350 °C Long lifetime
Marathon 350 °C

High mechanical resistance

Up to 400 injections per septa lifetime

TR-Blue 200 – 250 °C

Easy to penetrate

Suitable for routine applications

Inlet septa

The Inlet septa is an essential part of the sample introduction into a GC system. The purpose of the septa is to create a barrier which is penetrated readily from the nozzle needle and is maintained while the internal pressure is held up without contaminating the analysis.

Septa are available in a number of different materials and sizes (according to the specifications of the system). They are generally made from compositions made of silicone rubber with low bleed and high temperature limit. Therefore Septa are recommended in high/upper temperature limits. Materials for lower temperatures are generally softer, seal better and resist a greater number of injections as higher temperature material. If septa are used above the recommended temperature limit, it may leak into the inlet or decompose. This can lead to sample loss since the hermetic seal is lost, that results in lower column flow and a reduction in the life of the column.

Regular exchange of septa

To avoid greater damage and contamination in the entire GC system, the septa should be changed regularly. Thus leaks can be prevented or sample loss reduced in the system. By replacing the septa at reasonable intervals of decomposition of the septa in the system aperture can be counteracted and thus extend the life of the column.

If you can't find a suitable product for your applications, do not hesitate to contact us. Our expert team will advise you independently.