CAT NO: DIDACTICNLE-Export-132049
A most accurate and convenient model of universal hand refractometer
with a selector knob to indicate measurement range from 0-90% Accuracy
2%, Incorporates buit in Acmiprism and special light reflection system
for colour eliminator to obtain sharp critical boundary line and
optimum contast. Hand Refractrometers also available in three separate
ranges Model b.0-32% c.28-62% d.58-90%.