Desktop Whiteness Meter 1)can test powder,pasty,boards,paper/sheet, ... /DDS/TDS Meter, Incubator, shaker, Hotplate, Mixer, PCR, Oven, etc.Desktop Whiteness TesterApplication:This instrument based on the principle of photoelectric ... .2/10minRepeatability≤±0.2Power Supply220V+/-10%Measuring Condition0/dd/0 Desktop Whiteness Tester