Analox O2EII [USED]

Does not come with 9v battery or O2 sensor.

Analox O2EII, Pro- Portable Nitrox Checker, a portable nitrox analyzer that is small, lightweight, and rugged. It can easily be taken on all of your diving adventures. The O2EII Pro can be used to check the quality of your diving gas mix directly at the tank or through your BCD adaptor while in your harness.