Milwaukee Instruments MA800 Protective Hardshell Case for Refractometer and Photometers
Milwaukee MA887 Digital Salinity Refractometer with Automatic Temperature Compensation, Yellow LED, 0 to 50 PSU, +/-2 PSU Accuracy, 1 PSU Resolution
Amzdeal Salinity Refractometer Aquarium & Seawater - Dual Scale (1.0 to 1.070 S.G.)
Reed Instruments LM-81LX Light Meter