Hoʻohana nui ʻia ka mea hoʻomehana haʻahaʻa keleawe i ka mea haki kaapuni haʻahaʻa voltage, ka relay overload thermal, a me nā huahana uila haʻahaʻa voltage ʻē aʻe. ʻO ia kekahi o nā mea nui o nā huahana uila haʻahaʻa voltage. Loaʻa i nā mea i hana ʻia e kā mākou hui nā ʻano o ke kūpaʻa kūpaʻa maikaʻi a me ke kūpaʻa kiʻekiʻe. Hiki iā mākou ke hoʻolako i nā ʻano uea poepoe, nā mea pālahalaha a me nā mea pepa.

CuNi2 ke kū'ē haʻahaʻaHoʻohana nui ʻia ka mea hoʻomehana i ka mea haki kaapuni haʻahaʻa haʻahaʻa, ka relay overload thermal, a me nā huahana uila haʻahaʻa haʻahaʻa ʻē aʻe. ʻO ia kekahi o nā mea nui o nā huahana uila haʻahaʻa haʻahaʻa. Loaʻa i nā mea i hana ʻia e kā mākou hui nā ʻano o ke kūpaʻa kūpaʻa maikaʻi a me ke kūpaʻa kiʻekiʻe. Hiki iā mākou ke hoʻolako i nā ʻano uea poepoe, pālahalaha a me nā mea pepa.

ʻAʻole he magnetic ka mea hoʻohuihui. Hoʻohana ʻia ia no ke kū'ē loli o ka mea hoʻoulu hou uila a me ke kū'ē koʻikoʻi.
nā potentiometers, nā uea hoʻomehana, nā kaula hoʻomehana a me nā moena. Hoʻohana ʻia nā lipine no ka hoʻomehana ʻana i nā bimetals. ʻO kekahi kahua o ka noi ʻana, ʻo ia ka hana ʻana i nā thermocouples no ka mea e hoʻomohala ana i kahi ikaika electromotive kiʻekiʻe (EMF) me ka hui pū ʻana me nā metala ʻē aʻe.

Moʻo metala keleawe nikala: Constantan CuNi40 (6J40), CuNi1, CuNi2, CuNi6, CuNi8, CuNi10, CuNi14, CuNi19, CuNi23,CuNi30, CuNi34, CuNi44.