Net radiometer bụ ụdị actinometer eji tụọ ụzarị ụgbụ (NR) n'elu ụwa maka ngwa meteorological. Aha net radiometer na-egosipụta eziokwu na ọ na-atụle ọdịiche dị n'etiti radieshon ala/na-abata na elu/ pụta site na Ụwa. A na-ejikarị ya eme ihe na ngalaba nke ecophysiology.