OxyFerm FDA Polarographic Dissolved Oxygen SensorsTraditional DO measurement you can rely on The OxyFerm FDA is an electrochemical dissolved oxygen sensor suited for applications with high demands for hygiene, e. g. in pharmaceutical industry, in biotechnology and in food & beverage production. The sensor is equipped with a FDA approved membrane for usage in hygienic processes. It can withstand steam sterilization, autoclavation and CIP cleanings. Specifications a length 120, 225, 325, 425 mm