To allow you to correctly plan the depth, time and decompression stages for a safe and fun dive you need to know the oxygen (O2) content in your nitrox mix.

The O2EII Pro is a quick and reliable nitrox analyzer, helping you to take the plunge with confidence.

O2EII Pro Nitrox Checker
O2EII Pro Nitrox Checker - Dimensions
O2EII Pro Nitrox Checker
O2EII Pro Nitrox Checker - Dimensions


The O2EII Pro is a small, lightweight and rugged oxygen (O2) analyzer. Designed to check the quality of your scuba diving gas mix, the O2EII Pro can be used directly at the tank or through a BCD adaptor while in harness (BDC adaptor is not included).

This highly accurate analyzer comes with a three year graded sensor warranty and an expected sensor life of four to five years in air.

  • Fitted with a hose barb allowing the O2EII Pro to be used while checking air quality at the tank or while connected to the first stage regulator.
  • Provided with a temperature compensation chart, allowing the O2EII Pro to be calibrated correctly depending upon temperature and humidity.
  • Quick and simple to use, the O2EII Pro is a tried and tested oxygen analyzer.
  • Scuba diving
  • Commercial diving
  • Military diving
  • Medical cylinder verification
  • Tyre verification

Oxygen (O2)

Replacement sensors are available directly from Analox or through our network of distributors.

We also have a 24/7/365 emergency support helpline available to all customers.

Analox, always by your side.

  • BCD Flow Restrictor
  • Domed Adaptor
  • Box of 5 Sensor Savers
  • Box of 10 Sensor Savers
  • Replacement Oxygen (O2) Sensor
  • Peli Box
  • Replacement Tubing
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