SRZ-CT15 % Oxygen Sensor replaces Teledyne A-5, Analytical Industries XLT-11-15, GE Panametrics OX-4 and AMI P3 % oxygen sensor. This sensor is recommended for gas analysis in gas streams containing high levels of acid gases such as CO2. Its proprietary electrolyte formulation offers excellent compatibility with sample gas containing acid gases such as CO2, traces levels of H2S and SO2. Sensor is designed, developed and manufactured in the USA.