Platinum-rhodium thermocouple, wanda ke da fa'idodin daidaitattun ma'aunin zafin jiki, kwanciyar hankali mai kyau, yanki mai faɗin zafin jiki, tsawon rayuwar sabis da sauransu, ana kuma kiran shi babban zafin jiki mai daraja thermocouple. Ana amfani da shi sosai a fagen ƙarfe da ƙarfe, ƙarfe, ƙarfe, petrochemical, fiber gilashi, kayan lantarki, jirgin sama da sararin samaniya.

Duk da haka, yana da wahala a daidaita da mahalli masu sarƙaƙƙiya da kunkuntar wuraren sararin samaniya waɗanda ke buƙatar lanƙwasa da ɗan gajeren lokacin amsawar zafi saboda ƙarancin ƙarfinsa a yanayin zafi mai girma da kuma saninsa ga gurɓataccen muhalli.

Ƙarfe mai ɗorewa thermocouple wani sabon nau'in kayan auna zafin jiki wanda aka haɓaka bisa tushen ma'aunin ma'aunin ƙarfe mai daraja, wanda ke da fa'idodin juriya na girgiza, juriya mai ƙarfi, juriya ga lalata sinadarai na matsakaici, ana iya lanƙwasa, ɗan gajeren lokacin amsawa da karko.

Ƙarfe mai sulke mai sulke mai daraja musamman ya ƙunshi casing na ƙarfe mai daraja, kayan insulating, kayan waya na dipole. Yawancin lokaci ana cika shi da magnesium oxide ko wasu kayan da ke rufewa tsakanin katakon ƙarfe mai daraja da waya ta dipole, a cikin yanayin kula da yanayin zafi mai zafi, waya ta dipole tana cikin yanayi mai ƙarfi, don hana thermocouple daga lalacewa da lalacewa saboda iska ko iskar gas mai zafi. (hoton tsarin waya thermocouple kamar haka)