Zvinhu zve open coil zvine waya inodzivisa kupisa (inowanzova Ni-Chrome) yakakamhina pama terminals uye yakasungirirwa pakati pe ceramic insulators. Mhando dzakasiyana dze wire gauges, mhando dze wire uye dhayamita dze coil dzinowanzo shandiswa zvichienderana nezvinodiwa pakushandisa. Nekuda kwekusangana ne resistance wire, dzakakodzera chete kushandiswa munzvimbo dzinoisa low velocity nekuda kwenjodzi yekuti coil inosangana nemamwe coils uye ipfupise heater. Pamusoro pezvo, kusangana uku kunogona kukonzera njodzi yekuti zvinhu zvekunze kana vashandi vasangane newaya yemagetsi iri mhenyu. Zvisinei, kubatsira kwezvinhu zve open coil ndekwekuti zvine low thermal inertia, zvichikonzera nguva yekupindura nekukurumidza uye nzvimbo yavo diki inobvumira kudzikira kwekumanikidzwa.
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