Dhawaan, kooxdeena ayaa si guul leh u horumarisay Hafaa'i APM. Waa xoojinta budada budada ah, kala firidhsan, kala-duwanaanshaha budada ah, kala firidhsan, Ferrite Fercral Fooryo oo loo adeegsado heerkulka tubada ilaa 1250 ° C (2280 ° F).

Tuubooyinka TIFILI APM waxay leeyihiin deganaansho qaab wanaagsan heerkulka sare. Bileep APM waxay foolanaysaa dusha sare, oo aan faafin okside, oo si fiican u siiya inta badan bey'adda guryaha;

Codsiyada caadiga ah ee apm-ka ee Turwi waa tuubooyin iftiin leh oo ku yaal foornooyinka shilalka ee korantada ah sida foornooyinka is dabaqa ah, ku haynta foornooyinka aluminiumka, zinc, tuubooyinka hogaanka, tuubooyinka hufan ee loo yaqaan 'thermocouple' ee loogu talagalay codsiyada dembiga.

Waxaan ku siin karnaa APM qaab silig iyo tuubbada. Ku soo dhawow inaad dalbato ama weydiiso.