Raba bakin karfe harsashi hita

Harsashi hita (kuma aka sani da guda-kai lantarki dumama tube, Silinda hita) , the dumama part ne nickel-chromium zafi resistant gami waya, wanda aka rauni a kan magnesia core sanda tare da m rufi da thermal conductivity. Wayar dumama da harsashi suna cike da foda na magnesium oxide a matsayin kayan kariya kuma injin ya matsa don fitar da iska a ciki, ta yadda ya zama cikakke.

Saboda halaye na ƙananan ƙararrawa da babban iko na bututu mai dumama guda ɗaya, ya dace musamman don dumama ƙirar ƙarfe. Yawancin lokaci ana amfani dashi tare da thermocouple don cimma kyakkyawar dumama da tasirin zafin jiki.