kˈætɹɪn ɪz ɐ dʒˈɜːmən ˈækɹənˌɪm kˈɑːɹlsɹuːh tɹˈaɪɾiəm nuːtɹˈiːnoʊ ɛkspˈɛɹɪmənt fɚɹən ˌʌndɚtˈeɪkɪŋ tə mˈɛʒɚ ðə mˈæs ʌvðɪ ᵻlˈɛktɹɑːn ˌæntɪnuːtɹˈiːnoʊ wɪð sˈʌbˈiː vˈiː pɹɪsˈɪʒən baɪ ɛɡzˈæmɪnɪŋ ðə spˈɛktɹəm ʌv ᵻlˈɛktɹɑːnz ɪmˈɪɾᵻd fɹʌmðə bˈeɪɾə dᵻkˈeɪ ʌv tɹˈaɪɾiəm.
KATRIN is a German acronym (Karlsruhe Tritium Neutrino Experiment) for an undertaking to measure the mass of the electron antineutrino with sub-eV precision by examining the spectrum of electrons emitted from the beta decay of tritium.