Ithemometha ye -infrared ithemometha eyethula izinga lokushisa isuka engxenyeni yemisebe eshisayo kwesinye isikhathi ebizwa ngokuthi imisebe yomzimba omnyama ekhishwa into elinganiswayo.Ngezinye izikhathi abizwa ngokuthi ama-laser thermometers njengoba i-laser isetshenziselwa ukusiza ukukhomba izinga lokushisa, noma ama-thermometer angathinteki noma izibhamu zezinga lokushisa, ukuchaza ikhono ledivayisi lokukala izinga lokushisa likude.