Circler kuleylka kuleylka (oo sidoo kale loo yaqaan 'thermocycler', Mashiinka PCR ama DNA's Politier) waa qalab shaybaar ah oo inta badan loo isticmaalo in lagu qaado qaybaha DNA iyada oo loo marayo falcelinta silsiladda Polymerase (Pcr ). Mashiinku wuxuu ku leeyahay xannibaadda kuleylka leh godad halkaas oo tuubooyinku ku hayo isku-darka fal-celinta. Annaga (MECAN) ayaa bixin kara Mashiinka PCR iyo waqtiga-dhabta ah Mashiinka PCR (PT-PCR-PCR).