A na-eji waya na-eguzogide nickel chrome na-etinye n'ime chrome nickel steel tube nke jupụtara na ntụ ntụ MgO. A na-akpọkwa igwe ikpo ọkụ mmiri mmiri dị ka igwe ọkụ tubular arụmọrụ dị elu ma ọ bụ igwe ọkụ. Enwere ike ịmepụta ikpo ọkụ mmiri ma ọ bụ na-enweghị wuru na thermocouples. A na-eji ikpo ọkụ mmiri mmiri eme ihe n'ọtụtụ ebe na injinia kpo oku, ebu, ụlọ ọrụ plastik, gụnyere igwe na-ebufe, usoro nkedo, ịgbado ọkụ, usoro ọgwụgwọ okpomọkụ na ọtụtụ ụlọ ọrụ na ubi ndị ọzọ.