ColourChecker.
                 A low-cost colour measurement instrument for liquids
            
            
                ColourChecker measures the colour of liquids and comes in two varieties: 
            
            
                - ColourChecker On-line, designed to be attached to dyeing machines for on-line, i.e. real-time measurements in intervals of 10s or higher
- ColourChecker Dip, designed as a stand-alone instrument for off-line measurements similar to a pH meter