A scuba o2 analyzer is a tool that is used to check the oxygen levels in diving tanks. They are also used for personnel safety, monitoring confined spaces and verifying oxygen levels prior to welding. Using an electrochemical galvanic fuel cell oxygen sensor, these portable handheld analyzers are easy to use and provide accurate results in seconds. They are ideal for checking compressed breathing air scuba tanks intended for scuba diving and accelerated decompression Nitrox gas mixtures.

It is important to calibrate the scuba o2 analyzer using the same type of gas that will be used for testing. This helps to ensure that the analyzing machine is reading correctly and is giving the most accurate result. This is particularly important when comparing results with another dive shop or the results of a dive buddy. It is also important to take into consideration that the calibration of a galvanic oxygen sensor is affected by temperature and sudden changes in ambient temperature can cause significant variations in readings.

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Some scuba o2 analyzer designs include a flow restrictor that is designed to capture a stationary sample of gas and others are configured to interface with a BCD first stage to allow the use of the tank valve as a flow control. Both options are highly desirable for scuba divers and other users because they save time, which is often critical when getting ready to dive.

The AII Palm O2 D is an inexpensive hand held oxygen analyzer that is packed with high end features. It includes an oxygen sensor that can be replaced easily and a water resistant case with a waterproof user manual label. It is powered by AAA alkaline batteries and is capable of detecting 0 – 100% oxygen in less than two seconds with one-button calibration.