Mermistor, bangaren na semiconductor sun shahara da yanayin tsayayya da canje-canje na zazzabi, ya faɗi cikin nau'ikan zafin jiki mai kyau (PTC) da ƙarancin zafi (NTC) mara kyau.NTC Thermistor, ana amfani da shi don ma'aunin zafin jiki na yau da kullun, sarrafawa, da rama, an san su sosai azaman yanayin zafin jiki.Da bambanci, PTC Mermistor ba kawai auna da sarrafa zazzabi amma kuma ninki biyu a matsayin mai dumama mai dumama kuma yana aiki azaman "Swyar".Wannan na'urar mullifulancuran yana haɗu da matsayin mai hankali, mai shayarwa, kuma sauyawa, an kira shi a "Thermal sauyawa".
Ma'anar fasalin na Merm Mermistor shine mummunan yanayin zafinsa.Wannan yana nuna cewa kamar yadda zafin jiki yana ƙaruwa, juriya yana raguwa sosai.Levorging wannan kayan, ana amfani da kayan haɗin NTC akai-akai a cikin taushi fara hanyoyin, da kuma gano atomatik, musamman a cikin karamin kayan gida.Hakanan dai, an nuna shi a cikin zafin jiki na PTC ta hanyar zazzabi mai inganci, inda juriya ya kara dagewa zazzabi, saboda haka amfani da shi na gama gari a cikin da'irar sarrafawa ta atomatik.
Tsayar da ƙwararren ƙimar mai zafin jiki na mai saurin motsawa ga martani na zazzabi na waje.An nuna alamar rubutu a matsayin "RT".Mistristors tare da rashin lafiya zazzabi suna alama kamar NTC, yayin da waɗancan suke da kyawawan launuka masu kyau kamar PTC.Alamar hoto na Mermistor a cikin da'irori ana wakilta ta amfani da θ ko t° don nuna zazzabi.Wannan jujjuyawar alamomin da masu haɗin gwiwa suna taka muhimmiyar rawa wajen rarrabe tsakanin NTC da PTC, tana nuna aikace-aikacensu da suka dace cikin da'irar lantarki da na'urori.