... Refractometer, PH/DDS/TDS Meter, Incubator, shaker, Hotplate, Mixer, PCR, Oven, etc.Digital Whiteness Meter Model:AE-WSB-3ACharacteristics:1. Chemical & Building materials industry ... -3WSB-3AMeasurement Range0~120Measurement SystemR457 Blue Light WhitenessAccuracy0.01Zero Draft≤±0.1Stability0.2/10minRepeatabilityC Power Supply220V+/-10%Measuring Condition0/dd/0 Digital Whiteness Meter