SRX-CA32 % Oxygen Sensor is a direct replacement to AII Model GPR-11-32 % O2 sensor, used in GPR-2500, GPR-2600 and GPR-28 analyzers. 32 months sensor life in air. Its signal output range is 40-60uA in air at ambient temperature. Its proprietary electrolyte formulation ensures full utilization of Pb anode, thus providing longer life without signal drift and minimizing periodic calibration requirement. Sensor is designed, developed and manufactured in the USA.