Siketi Seppta, yomwenso imadziwika kuti septum raptune kapena chotseka, ndi gawo losindikiza lomwe limagwiritsidwa ntchito pazinthu labotale, makamaka mu chromatography ndi zitsanzo zosungira zosungira. Ndi chidutswa chozungulira chozungulira chopangidwa ndi mphira wa silicane womwe umayikidwa mkati mwa kapu kapena chidebe kuti mupange chisindikizo chokhazikika.
Sicona septa nthawi zambiri imagwiritsidwa ntchito molumikizana ndi zipewa kapena zikopa za crimp ku zika za chisindikizo zomwe zimagwiritsidwa ntchito mu chromatography (GC) ndi njira zina zowunikira. Amayikidwa pakati pa kapu ndi kutsegula kwapakati, ndipo chipewa chikalimbikitsidwa, septa chimapanga chotchinga chomwe chimalepheretsa kutaya kapena kuipitsidwa kwa chitsanzo.
