Umjikelezo we-thermal (okwaziwa ngokuba yi-thermocler, Umatshini we-PCR okanye i-DNA Amplifier) ​​sisixhobo se-labhoratri eqhelekile ukuba sisebenzise amacandelo e-DNA nge-polymerase chain chain yokuphendula (I-PCR ). Umatshini unebhloko ye-thermal enemingxunya apho iityhubhu zibambe umxube wokuphendula inokufakwa. Thina (i-mecan yezonyango) inokubonelela Umatshini we-prc kunye nexesha lokwenyani Umatshini we-PCR (i-RT-PCR).