The new PMD 500 Series of online process analyzers (photo) optically determine the moisture content and concentration of other constituents using near infrared (NIR) technology, thereby eliminating the need for testing random samples, which prevents downtime and saves costs. Concentrations of various ingredients, such as water, moisture, fat, protein and solvent can be analyzed online in milliseconds for free-flowing or pourable solids, liquids or pasty media. A particularly useful area of application is end-point determination in a mixing process, which can save considerable time and thus production costs. In fact, the manufacturer claims that in mixing applications PMD500 analyzers will pay for themselves within six months. Qualitative uses include visual characteristics, such as “bad spots” or black specks in product. The analyzers feature a flexible array of detectors for the UV|VIS and NIR spectra in combination with a high-resolution digital camera and a comprehensive software package. The PMD500 system works with a redundant light source and, thanks to the use of a diode array spectrometer, is capable of analyzing even fast-moving samples, such as those on a conveyor belt, and delivering accurate and reproducible values. The modular-design, low-maintenance system features a patented automatic calibration function and is also suitable for use in hazardous areas. — Sartorius Mechatronics, Goettingen, Germany