Yonke iqala ngenzwa. Ngokungafaniyo ne-thermometer ezaliswe ngamanzi kunye ne-bi-metal thermometer, i-thermometer yedijithali idinga inzwa.
Ezi zinzwa zonke zivelisa nokuba yi-voltage, yangoku, okanye utshintsho lokumelana xa kukho utshintsho lobushushu. Ezi ziimpawu 'ze-analog' ngokuchasene neempawu zedijithali.Zingasetyenziselwa ukuthatha ufundo lobushushu emlonyeni, kwi-rectum, okanye kwikhwapha.
Iithemometha ze-elektroniki zisebenza ngendlela eyahluke ngokupheleleyo kweyoomatshini abasebenzisa imigca yemekyuri okanye izikhombisi zokusonta. Zisekelwe kwingcamango yokuba ukuxhathisa kweqhekeza lesinyithi (ukulula ukuhamba kombane kuyo) kuyatshintsha njengoko ubushushu buguquka. Njengoko isinyithi sisiya sishushu, iiathom zingcangcazela ngakumbi ngaphakathi kuzo, kuba nzima ukuba umbane uhambe, kwaye ukuxhathisa kuyanda. Ngokufanayo, njengoko iintsimbi zipholile, ii-electron zihamba ngokukhululekileyo kwaye ukuxhathisa kuhla.
Oku kungezantsi kukuchaneka okuphezulu kwethu kwethemometha yedijithali kwireferensi yakho:
