... , PH/DDS/TDS Meter, etc.Application:This instrument based on the principle of photoelectric effect & D65 light source ... , paper, paste, sheet, clay, etc.² Chemical & Building materials industry: White Cement (powder), Paint (pasty), Coating (pasty), Plastic ( ... Factory (paper/sheet), Publishing Company (paper/sheet), etc² Textile industry: Fabric (sheet), Gauze (sheet), Weaving factory (sheet), cotton ...