FermSense DO is a sterilizable Dissolved Oxygen Sensor with Amperometric sensing method. The membrane design has an expandable inner Silicone bladder that holds the electrolyte within a 316L stainless steel cage. The membrane cartridge design is easy to use and durable. 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.