53.0mS Salinity Calibration Fluid, Refractometer

Item Description: 3.6ml Vial of 53.0mS Salinity Refractometer Calibration Fluid (Conductivity Standard) THIS IS THE BEST WAY TO CALIBRATE YOUR SALINITY REFRACTOMETERS! NO MATTER WHICH UNIT YOU HAVE OR WHERE IT CAME FROM, THIS FLUID WILL HELP ...