REFRACTOMETER
REFRACTOMETER 0 – 100 PPT OF NACL (?) AND 1.000 TO 1.070 SPECIFIC GRAVITY – PC (A1912)
REFRACTOMETER 0 – 28% SALINITY – PC (A1913)
REFRACTOMETER 0 – 32% BRI X – PC (A1908)
REFRACTOMETER 28 – 62% BRI X – PC (A1909)
REFRACTOMETER 45 – 82% BRI X – PC (A1910)
REFRACTOMETER 58 – 90% BRI X – PC (A1911)