SRX-MGP-41 PPM Oxygen Sensor is a galvanic type micro fuel cell specific to oxygen. Its innovative design with electro-etched sensing cathode provides with extremely smooth sensing surface for excellent signal stability. Proprietary electrolyte formulation enhances sensor performance at extreme ends of recommended temperature range. Coiled shape anode eliminates the possibility of air bubble entrapment in typical crushed Pb granules anode, thus resulting spike free oxygen signal. Sensor is designed, developed and manufactured in the USA.