Request InfoSpectral Evolution Inc.The PSR+ and RS-3500 NIR field spectroradiometers from Spectral Evolution Inc. are portable, full-range, UV-VIS- NIR instruments with high resolution and low noise. They measure cellulose fast and nondestructively in the field with no sample prep. They feature a broad absorption peak at around 1216 nm from C-H stretching. DARWin SP Data Acquisition software includes 19 vegetation indices in a pull down menu including the NDVI and red/green indices, which can be used to determine the health of a plant or a canopy. 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