Ma'anar ƙamus na dosimeter shine "kayan aikin da ake amfani da shi don auna adadin radiation da mutum ko abu ya karɓa." Yawanci ma'aikata ne ke sawa a fagage kamar su tashar makamashin nukiliya, hoton likitanci, da kuma maganin radiation don saka idanu akan bayyanar su ga radiation. Dosimeters suna zuwa da nau'o'i daban-daban, kamar bajojin fim, thermoluminescent dosimeters, da na'urorin lantarki, kuma suna auna adadin radiation da mai amfani da shi ko abin da ke sha na tsawon lokaci.