Sealed to resist dust/dirt/moisture ingress, portable RS-3500 does not require sample prep and enables in-field, non-destructive data collection. NIR field spectrometer (350–2,500 nm) offers respective resolutions of 3, 8, and 6 nm at 700, 1,500, and 2,100 nm. Designed without any moving optical parts, rugged 7 lb unit features quick optical connect/disconnect for in-field accessory swapping, leaf clip with external data triggers and disposable white reference, and ILM-105 light source.