Findor yana aiki ta hanyar canza yawan masu lantarki zuwa siginar wutar lantarki ko wasu nau'ikan fitarwa na bayani. Aikin asali na firikwensin shine canza bayanan da ake ganewa cikin siginar lantarki bisa ga wani takaddun isowar watsa bayanai, sarrafawa, adanawa, nuni, rakodi da sarrafawa. ‌

Yadda nau'in na'urori masu kyau daban-daban sun haɗa da:

Senoric Santor: Dangane da ka'idar aikin da ke aiki da yanayin zafin rana ta hanyar auna canjin zafin jiki na abu ko muhalli. Mermistor na yau da kullun ya ƙunshi Thermistor da Mermistor, lokacin da yawan zafin jiki ya canza, za a iya lissafin canji a cikin tsayar da ƙuruciya za a iya ƙididdige zazzabi.
Senor zafi: Yawancin lokaci ana amfani da ƙaƙƙarfan aikin aiki, wanda aka haɗa da wayoyin lantarki guda biyu, matsakaici shine kayan hygroscopic. Lokacin da danshi abun ciki a cikin iska canje-canje, da zafi na hygroscopic kayan za su iya ƙididdige ƙimar kide-iri, kuma za a iya ƙididdige darajar kyamarar ƙarfin, kuma za a iya ƙididdige darajar kyamarar ƙarfin, da kuma darajar zafi ta hanyar auna canji a ƙimar kyamarar.
Sadarwa ta Harafi: gaba ɗaya suna amfani da hanyoyin matsin lamba, kamar ma'aunin fim ko iri. Lokacin da aka yi amfani da sojojin ga waɗannan abubuwan, siffarsu ko girmansu yana canzawa kaɗan, kuma ana iya samun bayanan matsin lamba ta hanyar auna waɗannan canje-canje. Misali, lokacin da bakin fim na bakin ciki ya haifar da damuwa, da darajar karfin ta za ta canza, kuma za'a iya yin lissafin darajar juriya ta hanyar auna canji a darajar juriya.
Hasken haske: Aiki dangane da tasirin hotunan hoto na wani hoto mai hoto ko photodiode. Lokacin da hasken yana haskakawa akan hoto, juriya ko halin da ke cikin muhimmar hoto zai canza daidai da, kuma ana iya samun bayanan ƙarfin haske ta hanyar auna wannan canjin.
Hanyoyin hanzari: Rukunin injiniyan (Mems) ana amfani dashi sau da yawa, ta amfani da ƙananan tsarin kayan aiki dangane da ƙa'idar taro. A lokacin da ko rawar jiki na faruwa, tiny taro a cikin firikwensin zai yi gudun hijira, kuma ta hanyar auna wannan fitowar ko bayanin martaba, hanzari ko kuma za'a iya lissafa bayanan motsi, da aka yi amfani da shi ko bayanan motsi.
Magnetic Senor: Aiki akan Hall Tasirin ko Magnetowsist. Hall Main yana samun bayanin karfin gyaran zartarwa ta hanyar auna canji na dutsen wanda ya haifar da tsarin kararwar maganadia wanda ya haifar da canjin yanayin magnetwesor.
Ka'idojin waɗannan masu aikin sirri suna nuna bambancin da rikice-rikice cikin aikace-aikace iri-iri, kowannensu yana da nasa na musamman kayan aiki na musamman don saduwa da takamaiman bukatun bukatun.