As an important element in scuba diving equipment, an oxygen analyzer is an instrument that detects gas measurements in trace levels of oxygen. The analytical equipment takes gas samples for analysis and can be used in open air environments or where pure oxygen is encountered, like with underwater oxygen tanks.
What to Look for
Look for an oxygen analyzer that is appropriate for your diving environment. You can find a handheld model, or a stand-alone model that is larger, comes with a protective casing, and is designed for oxygen analysis other than in the water. When buying a handheld oxygen analyzer, it is best to use one that comes with an ergonomically designed grip handle for easy handling in water. Often models come with a lanyard wrist attachment that prevents the unit from getting lost in the water. The oxygen analyzer should of course be water resistant as well as compact and light. The readout area should be easily legible, featuring an LCD display that can be frozen to clearly show the reading. Look for a model that has one-touch calibration for easy manipulation. Some oxygen analyzers come with an auto switch that activates after 10 minutes. Some oxygen analyzers come with sensors that are easy to change when necessary. If you are buying a model that uses alkaline batteries, make sure the unit comes with a low battery indicator. Other elements to consider when buying your oxygen analyzer are a flow meter, a sampling hose, and an adapter for oxygen cylinders that are fitted with a standard yoke or a DIN valve.
Common Pitfalls
Buy an oxygen analyzer that provides accurate and stable analysis. Many units do not come with easy-to-read displays, making it difficult to check your read-out in less than clear waters. Because your dive equipment includes many different types of gadgets, including various hoses and flow restrictors, your oxygen analyzer should be made of components that are easy to use; an overly complicated analyzer is only going to cause troubles when you least need them. Look for high-quality elements, such as heavy-duty housing to prevent cracks during your dive, and avoid an oxygen analyzer that looks low quality--regardless of how cheap it is. Make sure your model comes with a guarantee for service and replacement parts.
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