Working alone or in combination with hyperspectral or multi-spectral imaging from satellite or airborne sources, PSR+ 3500 provides non-destructive species identification in situ. Portable 350–2,500 nm unit offers auto-shutter, auto-exposure, and auto-dark exposure. Using reflectance measurements, researchers can discriminate between species by examining distinctive absorption features in full spectrum such as moisture content, color variation, and lignin/cellulose values.