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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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Septa

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  1. Agilent Technologies

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

    €88.00
    SKU: AG5183-4757
    In Stock
  2. Supelco

    THERMOGREEN LB-2 FOR SHIMADZU PK/50

    €127.00
    SKU: SU20633
  3. Supelco

    Septum Thermogreen LB-2, 9 mm diameter, PK50

    €124.00
    SKU: SU28021-U
  4. SGE

    CS septa, 5 mm diameter, PKT50

    €43.00
    SKU: SG041820
  5. SGE

    CS septa, 11 mm diameter, PKT50

    €50.00
    SKU: SG041826
  6. SGE

    CS septa, 11,5 mm diameter, PKT50

    €50.00
    SKU: SG041827
  7. SGE

    SHIMADZU ENDURO septa PKT50

    €119.00
    SKU: SG041890
  8. SGE

    HT septa, 11 mm diameter, PK25

    €50.00
    SKU: SG041898
  9. Supelco

    PK100 PTFE/SILICONE SEPTA FOR 4ML VIAL

    €59.00
    SKU: SU27144
  10. Supelco

    PK100 20MM PTFE/SILICONE SEPTA, .030IN T

    €77.50
    SKU: SU27539
  11. Supelco

    PK100 20MM SEAL,OPEN CENTER

    €18.00
    SKU: SU27230-U
  12. Supelco

    PK10 1L TEDLAR SCV GAS SAMPLING BAG &

    €120.00
    SKU: SU30272-U
  13. Supelco

    PK10 3L TEDLAR SCV GAS SAMPLING BAG &

    €166.00
    SKU: SU30285-U
  14. Agilent Technologies

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

    €81.00
    SKU: AG5183-4759
  15. Thermo Fisher Scientific

    Septum BTO INJ SSL 17 pk10

    €20.25
    SKU: TF31303210
  16. SGE

    MN septa, 12,5 mm diameter, PKT48

    €84.00
    SKU: SG0418503
  17. SGE

    HT septa, 12,5 mm diameter, PK24

    €50.00
    SKU: SG0418992
  18. Altmann Analytik

    Septa BTO Non-Stick, Silicon red diam. 11mm, 50/pk

    €108.56
    SKU: AAG298717
  19. Agilent Technologies

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

    €20.00
    SKU: AG5182-0730
  20. Agilent Technologies

    Septa red PTFE/white Sil., 12 mm diameter,, 100 St.

    €20.00
    SKU: AG5183-4460
  21. Agilent Technologies

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

    €162.00
    SKU: AG5183-4757-100
  22. Agilent Technologies

    CrossLab BTO inlet septa 9 mm diameter, 100pk

    €147.00
    SKU: AG8010-0218
  23. Agilent Technologies

    CrossLab BTO inlet septa 11 mm diameter, 50pk

    €83.00
    SKU: AG8010-0223
  24. Altmann Analytik

    Shimadzu Plug, transp., 25/PAK

    €37.74
    SKU: AAV18292046
  25. Altmann Analytik

    Univ. HT Inject. Port septa, 10 mm diameter, transp., 25/PAK

    €37.74
    SKU: AAV21292048
  26. Altmann Analytik

    Univ. HT Inject. Port septa, 11 mm diameter, transp., 25/PAK

    €37.74
    SKU: AAV22292049
  27. Supelco

    SEPTUM PULLER EA, 1 pc

    €27.25
    SKU: SU20352
  28. Supelco

    SCREW TYPE SEPTUM PULLER EA, 1 pc

    €27.25
    SKU: SU20353
  29. Supelco

    SEPTUM,GR-2 GRAY,9.5 mm diameter, PK100

    €68.00
    SKU: SU20405
  30. Supelco

    SEPTUM,GR-2 GRAY,12.5 mm diameter, PK100

    €68.00
    SKU: SU20413
  31. Supelco

    SEPTUM,GR-2 GRAY,11 mm diameter, PK100

    €68.00
    SKU: SU20421
  32. Supelco

    SEPTUM,GR-2 GRAY,10 mm diameter, PK100

    €68.00
    SKU: SU20441
  33. Supelco

    SEPTUMS,GR-2 GRAY,6 m,m diameter, PK100

    €68.00
    SKU: SU20442-U
  34. Supelco

    THERMOGREEN LB-2, 7,4 mm diameter, PK/10

    €32.25
    SKU: SU20606
  35. Supelco

    THERMOGREEN LB-2 FOR SHIMADZU PK/10

    €43.75
    SKU: SU20608
  36. Supelco

    SEPTUM,GR-2 GRAY,9.5 mm diameter, PK250

    €145.00
    SKU: SU20625
  37. Supelco

    SEPTUM,GR-2 GRAY,9.5 mm diameter, PK1000

    €514.00
    SKU: SU20627
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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.