Ma'anar ƙamus na "pyrometric cone" yana nufin ƙarami, mazugi yumbura mai tafke wanda ake amfani da shi azaman ma'aunin zafi a aikace-aikace masu zafi kamar a cikin kilns ko tanderu. An yi cones na pyrometric daga ƙayyadaddun kayan yumbu waɗanda aka tsara don lanƙwasa ko narke a takamaiman zafin jiki. Lokacin da aka sanya shi a cikin yanayin zafi mai zafi, mazugi zai fara lalacewa, wanda ke nuna cewa zafin jiki ya kai takamaiman mazugi ko narkewa. Ana amfani da mazugi na pyrometric a cikin yumbu, yin gilashi, da sauran masana'antu inda madaidaicin sarrafa zafin jiki yana da mahimmanci.