Optical spectrometer - SR2 - Ocean Insight - for analysis / compact / USB
The Red Tide Spectrometer
Optical Spectrometer | Low Price, USB, UV-Vis Range | Ossila
Mini USB Spectrometer Spectromètre Spektrometre - ThunderOptics - New Product | eBay
Indigo | Visible Handheld Spectrometer - A Powerful Portable Spectrometer for Lab or Field Use - USB-C Connection to PC or Bluetooth Connection to Android Mobile Device: Amazon.com: Industrial & Scientific