The OUSBT66 sensor is designed for cell-density measurements using near-infrared (NIR) absorbance technology. The non-intrusive, hygienic sensor can monitor cell growth in life science processes, fermentation biomass measurement and algae biofuel applications. The sensor allows rapid and accurate measurement of cell growth activity in cultures and can be used for realtime, in-situ cell-production optimization and to identify the end-of-log-growth phase and the achievement of stationary growth. The body of the OUSBT66 sensor is constructed of 316L stainless steel and uses proven optical sensor technology, the company says. Using an LED light source, the sensor filters the light to 880 nm, the detection of which is correlated to the density of cells in the process. — Endress + Hauser, Greenwood, Ind.