ʻO ka thermometer infrared he ana wela e hoʻoheheʻe ana i ka wela mai kahi hapa o ka pāhawewe wela i kapa ʻia i kekahi manawa i ka radiation kino ʻeleʻele i hoʻokuʻu ʻia e ka mea i ana ʻia.Ua kapa ʻia lākou i kekahi manawa he laser thermometers no ka hoʻohana ʻana i ka laser e kōkua i ke kuhikuhi ʻana i ka thermometer, a i ʻole nā ​​thermometers pili ʻole a i ʻole nā ​​pū wela, e wehewehe i ka hiki o ka mea hana ke ana i ka mahana mai kahi mamao.