FermSense DO-O is a sterilizable Dissolved Oxygen Sensor with Optical sensing method. It combines an optical sensor type PSt7 and electro-optical module in one probe. The wide range sensor with measurement range of 0 - 100 % O2 is ideally suited for application in the biotech sector. They are directly connected to the control unit and have a standard PG 13.5 stainless steel thread for easy integration at the measurement site.