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Oxygen sensors and oxygen monitors are designed to measure the quantity of oxygen in the air or in a closed environment. Fresh air at standard temperature and pressure has 20.95% oxygen (209,5000 ppm). OSHA defines air that contains less than 19.5 percent oxygen as oxygen deficient, and air that contains more than 22 percent as oxygen enriched.

All our oxygen sensors and oxygen monitors measure between 0-21% oxygen and are useful for measuring oxygen depletion. 0-25% oxygen sensors can also be used to measure oxygen enriched air. See our oxygen sensor comparison chart here.

Gaslab offers oxygen sensors individually for replacement in other manufacturer's devices or on PCBs that connect via USB to our free GasLab® software. In addition we also offer handheld and wall-mounted oxygen depletion safety monitors.

Note that electrochemical sensors must be stored in sealed containers between 37° and 68°F (3° and 20°C) for long life. Some suppliers do not do this. Our sensors are stored in sealed containers in a refrigerator at 40°F (4.4°C) to provide the longest sensor lifespan when it is delivered to you.

"Swift response and shipment. The product is easy to setup and use. It is just what I was looking for."

- Shima Tomohiro

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