Whiteness Tester 1)can test powder,pasty,boards,paper/sheet,clump etc; 2) ... /TDS Meter, Incubator, shaker, Hotplate, Mixer, PCR, Oven, etc. Whiteness Tester Application:This instrument based on the principle of photoelectric effect ... )With English User's Manual,English Control Panel;6)Warranty:1 year. Technical Specifications: ModelWSB-1Measurement Range0-199Measuring Condition45/0Measurement ...