AUNMAS Refractometer Salinometer, Seawater Salinity Meter Aquarium Optics Refractometers Temperature ATC Digital 0-10% Aquarium Sea Water Pool Marine Fishkeeping Hydrometer Measurement

About this item [ MEASUREMENT RANGE ]: 0 to 10% salinity, 0.01% Study accuracy. [ STRUCTURE & DESIGN ]: Copper construction, main prism daylight plate calibration screw rubber grip focus adjustment eyepiece. You can adjust the prism when you can not see scale clearly. The Soft rubber eye piece makes you have a comfortable viewing. [ EASY TO USE ]: Place 2 drops sample on the main Prism and close the panel and hold the refractometer up to the light and look through the eyepiece. [ WIDE USAGE ]: the salinity refractometer can test the concentration of salt water, for aquarium marine monitoring in scientific research and clinical laboratories. [ FULL KIT ]: 1 x Storage Case with Inner Protective Tray, 1 x Salinity Refractometer, 1 x Mini Screwdriver, 1 x Cloth, 1 x Pipette, 1 x Instruction Manual.