This electrochemical oxygen sensor by AlphaSense is designed for low-oxygen safety applications. It is is a plug-in replacement part for the oxygen sensor used in the RAD-0200 Remote CO2+Oxygen Storage Safety Dual Alarm. See the sensor replacement video.
This oxygen sensor does not require power. Instead, it is like a "battery" that generates micro-amperes proportional to the ambient oxygen level. It uses capillary flow control to provide good pressure and temperature dependence.For measuring precise oxygen levels, we recommend the UV-Flux 25% Oxygen Sensor, the UV-Flux 25% Oxygen Sensor PCB Module, or the TR250Z Oxygen Sensor, which can measure up to 95% oxygen.