The O2EII™ is really easy to use with a simple 5 step process  allowing you to plan for a safe nitrox dive.
Easy to use  -  Ergonomically designed comfort grip with automatic switch off after ten minutes.
Easy to read  -  Once you have completed your analysis, simply freeze your reading on the display
Easy to carry  -  The O2EII™ is fitted with a handy wrist lanyard.
Easy to maintain  -  The O2EII™ oxygen sensor has a long life and is easy to change.

Click to see video "How to use the Analox O2EII analyser" on You Tube

Scroll down to see how to change sensor cell

Analox O2EII Nitrox Analyser 
WITH Waterproof protective box
and sensor saver plug
£179 inc delivery in Mainland UK

How to change an Oxygen sensor in the Analox O2EII