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We supply a good selection of high quality septa for your laboratory applications. We stock septa by Agilent Technologies, SGE and other leading manufacturers. High-quality and affordable alternatives are available  with products 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.

    Regular Price: $144.41

    Special Price $137.19

    sku: AG5183-4757
  2. Agilent Technologies

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

    Regular Price: $24.62

    Special Price $23.39

    sku: AG5182-0731
  3. SGE

    HT septa, 6 mm, 50 pc/pak

    Regular Price: $108.89

    Special Price $103.45

    sku: SG0418999
  4. SGE

    GP septa, 5 mm, 50 pc/pak

    Regular Price: $55.08

    Special Price $52.33

    sku: SG041820
  5. SGE

    GP septa, 11 mm, 50 pc/pak

    Regular Price: $64.05

    Special Price $60.85

    sku: SG041826
  6. SGE

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

    Regular Price: $64.05

    Special Price $60.85

    sku: SG041827
  7. SGE

    MN septa, 11 mm, 50 pc/pak

    Regular Price: $107.60

    Special Price $102.22

    sku: SG041856
  8. SGE

    GP septa, Shimadzu ENDURO, plug, 50 pc/pak

    Regular Price: $152.44

    Special Price $144.82

    sku: SG041890
  9. SGE

    HT septa, 11 mm, 25 pc/pak

    Regular Price: $64.05

    Special Price $60.85

    sku: SG041898
  10. Agilent Technologies

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

    Regular Price: $132.92

    Special Price $126.27

    sku: AG5183-4759
  11. SGE

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

    Regular Price: $107.60

    Special Price $102.22

    sku: SG0418503
  12. SGE

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

    Regular Price: $64.05

    Special Price $60.85

    sku: SG0418992
  13. Altmann Analytik

    Septa AG3, Silicon green, diam. 11 mm (7/16), Centerguide, thickness 3mm, (50pk)

    Regular Price: $128.02

    Special Price $121.62

    sku: AAG246225
  14. Altmann Analytik

    Septa BTO, Silicon red, diam. 9 mm, CenterGuide, thickness 3mm, (50pk)

    Regular Price: $139.07

    Special Price $132.12

    sku: AAG298713
  15. Altmann Analytik

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

    Regular Price: $139.07

    Special Price $132.12

    sku: AAG298717
  16. Altmann Analytik

    Septa BTO, Silicon red, diam. 11.5 mm, CenterGuide, thickness 3mm, (50pk)

    Regular Price: $139.07

    Special Price $132.12

    sku: AAG298777
  17. Agilent Technologies

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

    Regular Price: $32.82

    Special Price $31.18

    sku: AG5182-0730
  18. Agilent Technologies

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

    Regular Price: $32.82

    Special Price $31.18

    sku: AG5183-4460
  19. Agilent Technologies

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

    Regular Price: $265.83

    Special Price $252.54

    sku: AG5183-4757-100
  20. Agilent Technologies

    CrossLab BTO inlet septa 9 mm diameter, 100pk

    Regular Price: $241.23

    Special Price $229.17

    sku: AG8010-0218
  21. Agilent Technologies

    CrossLab BTO inlet septa 11 mm diameter, 50pk

    Regular Price: $136.20

    Special Price $129.39

    sku: AG8010-0223
  22. Altmann Analytik

    Shimadzu Plug, transp., 25/PAK

    Regular Price: $48.34

    Special Price $45.92

    sku: AAV18292046
  23. Altmann Analytik

    Univ. HT Inject. Port septa, 9,5 mm diameter, transp., 25/PAK

    Regular Price: $48.34

    Special Price $45.92

    sku: AAV20292047
  24. Altmann Analytik

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

    Regular Price: $48.34

    Special Price $45.92

    sku: AAV21292048
  25. Altmann Analytik

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

    Regular Price: $48.34

    Special Price $45.92

    sku: AAV22292049
  26. Altmann Analytik

    Univ. HT Inject. Port septa, 12,5 mm diameter, transp., 25/PAK

    Regular Price: $48.34

    Special Price $45.92

    sku: AAV23292050
  27. Altmann Analytik

    Universal HT Injection Port septa, 17 mm diameter, transp., 25/PAK

    Regular Price: $48.34

    Special Price $45.92

    sku: AAV28292051
  28. SGE

    Replacement septa for GAV-200 MKII, 5 pc/pak

    Regular Price: $24.83

    Special Price $23.59

    sku: SG090113
  29. SGE

    GP septa, 6 mm, 50 pc/pak

    Regular Price: $55.08

    Special Price $52.33

    sku: SG041821
  30. SGE

    GP septa, 7 mm, 50 pc/pak

    Regular Price: $55.08

    Special Price $52.33

    sku: SG041822
  31. SGE

    GP septa, 8 mm, 50 pc/pak

    Regular Price: $55.08

    Special Price $52.33

    sku: SG041823
  32. SGE

    GP septa, 9 mm, 50 pc/pak

    Regular Price: $55.08

    Special Price $52.33

    sku: SG041824
  33. SGE

    GP septa, 10 mm, 50 pc/pak

    Regular Price: $55.08

    Special Price $52.33

    sku: SG041825
  34. SGE

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

    Regular Price: $64.05

    Special Price $60.85

    sku: SG041828
  35. SGE

    GP septa, 15 mm, 48 pc/pak

    Regular Price: $81.98

    Special Price $77.88

    sku: SG041829
  36. SGE

    EC septa, 6 mm, 50 pc/pak

    Regular Price: $65.33

    Special Price $62.06

    sku: SG041841
  37. SGE

    EC septa, 7 mm, 50 pc/pak

    Regular Price: $65.33

    Special Price $62.06

    sku: SG041842
  38. SGE

    EC septa, 8 mm, 50 pc/pak

    Regular Price: $65.33

    Special Price $62.06

    sku: SG041843
  39. SGE

    EC septa, 10 mm, 50 pc/pak

    Regular Price: $65.33

    Special Price $62.06

    sku: SG041845
  40. SGE

    MN septa, 5 mm, 50 pc/pak

    Regular Price: $107.60

    Special Price $102.22

    sku: SG041850
  41. SGE

    MN septa, 9 mm, 50 pc/pak

    Regular Price: $107.60

    Special Price $102.22

    sku: SG041854
  42. SGE

    HT septa, 9,5 mm, 100 pc/pak

    Regular Price: $210.08

    Special Price $199.58

    sku: SG041881
  43. SGE

    HT septa, 11 mm, 100 pc/pak

    Regular Price: $210.08

    Special Price $199.58

    sku: SG041883
  44. SGE

    HT septa, Shimadzu, plug, 50 pc/pak

    Regular Price: $170.37

    Special Price $161.85

    sku: SG041895
  45. SGE

    HT septa, 9 mm, 25 pc/pak

    Regular Price: $64.05

    Special Price $60.85

    sku: SG041896
  46. SGE

    HT septa, 9,5 mm, 25 pc/pak

    Regular Price: $64.05

    Special Price $60.85

    sku: SG041897
  47. SGE

    HT septa, 11,5 mm, 25 pc/pak

    Regular Price: $64.05

    Special Price $60.85

    sku: SG041899
  48. SGE

    EC septa, 9 mm, 25 pc/pak

    Regular Price: $58.93

    Special Price $55.98

    sku: SG041900
  49. SGE

    EC septa, 9,5 mm, 25 pc/pak

    Regular Price: $58.93

    Special Price $55.98

    sku: SG041901
  50. SGE

    EC septa, 11 mm, 25 pc/pak

    Regular Price: $58.93

    Special Price $55.98

    sku: SG041902
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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.