This HunterLabs ColorTrend HT Color Management System is in used condition and was removed from a working environment. Please note that this item is one of our older listings and we are planning to retest and reshoot photos. Some of the photos included with original listing were located in the description and as a result could not be transferred. Please see screenshot of the description page from the original listing. We will be happy to provide additional information as well as new photos upon request. Please feel free to contact us with any questions. On-Line Color-Trend Monitoring System ColorTrend HT is a low-cost process monitoring instrument that is used to monitor color changes for such products as cereal, chemicals, cookies, crackers, crushed stone, fertilizer, fiberboard, industrial minerals and roofing granules. Positioned anywhere between 5 cm to 15 cm away from the moving product, ColorTrend HT measures color, yet does not come in contact with your product or interfere with your process. It is a rugged, cost-effective tool for continuously measuring and reporting trends in product color and, if desired, height. In order to quantify color, ColorTrend HT reports data using globally accepted color scales. These scales simulate the process of human vision. For example the L*, a*, b* scale measures color by quantifying the degree of light to dark (L*), red to green (a*) and yellow to blue (b*). Consequently, we can say that the ColorTrend HT measures a product's color as the human eye sees it, but is more consistent and repeatable. The ColorTrend HT System consists of a sensor, a support unit, and various interface options. These include analog outputs, connection to a PC, hand-held operator terminal and fixed terminal that is built into the cover of the support unit.