... Auto Melting Point Apparatus, Automatic Refractometer, Abbe Refractometer, PH/DDS/TDS Meter, etc.Application:This instrument based on the ... Range0~100.0%Measurement SystemR457 Blue Light WhitenessAccuracy0.1Zero Draft0.1/10minStability0.2/10minRepeatability0.2Power Supply220V+/-10%OutputRS232 Interface--- --- ... Whiteness Meter (0-100%,LED display, touch panel, test paper, rice, flour, powder, paste)