The O2EII Pro is the ideal portable nitrox (nitrogen and oxygen) analyser, which can easily be taken on all of your scuba diving adventures.

Product code: EIIPAYYA. The O2EII Pro package includes an O2EII Pro portable nitrox checker with LCD display. Please note that the O2EII Pro does not come with a BCD flow restrictor.


The O2EII Pro nitrox (nitrogen and oxygen) analyser comes with a hose barb which allows the unit to be used while checking air quality at the tank or while the user is connected to their first stage regulator.


The O2EII Pro nitrox analyser is a highly accurate device and a must have for any scuba diver. The unit comes with a three-year graded sensor warranty and has an expected sensor life of four to five years in air.


In order to plan for a safe scuba dive, you need to know the concentration of oxygen within your dive gas mix.

 Monitoring the oxygen levels within your gas mix by using the O2EII Pro nitrox analyser will determine your entire dive plan allowing you to plan the depth, time and decompression stages allowing for a carefree dive.

 The addition of a spigot that takes the hose of a BCD adapter, allows the unit to be used while checking air quality at the tank or while the user is connected to their regulator via their BCD’s low pressure inflator.


Please note the O2EII Pro nitrox analyser does not come with a BCD flow restrictor.


The O2EII Pro scuba analyser is small, lightweight and rugged. It can be used to check the quality of your scuba diving gas mix directly at the tank or through your BCD adaptor while in your harness.

 With the unit, Analox Sensor Technology provides an oxygen compensation chart, which enables the unit to be used in all environments around the globe. This allows you to correct the unit based on temperature and humidity.


Auto switch off to preserve battery
life when not being used
3-year graded sensor warranty
4-5 year expected sensor life in air
Small and lightweight
Water and drop resistant
Designed to be held in the left hand
to enable ease of use when checking
your tank
Large digital display


Range: 0.1 to 100% O2
Accuracy: ± 1% of reading, ± 0.2% of O2
Resolution: 0.1% oxygen
Warm up time: < 5 seconds
Response time: 90% in less than 15 seconds
Sensor type: Analox 9100-9220-9B type electrochemical sensor
Sensor life: 4 to 5 years in air, 36 month graded warranty
Battery: 9 V Alkaline (PP3)
Battery life: Approximately 1 year
Operating temperature: −5 to 50 °C / 23 to 122 °F
Storage temperature: −20 to 50 °C / −4 to 122 °F
Pressure: Sensitive to the partial pressure of oxygen
Temperature effect: 0.1% O2/°C, 0.055% O2/°F
Weight: 225g / 8oz
Dimensions: 130 x 70 x 55 mm (l x w x d), 5 1/4 x 2 3/4 x 2 1/4 inches (l x w x d)
IP rating: IP65 / NEMA 4

O2EII Pro nitrox analyser spares available

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Analox O2EII PRO - Nitrox and Oxygen Analyser

  • Brands Analox
  • Product Code: Analox O2EII PRO - Nitrox ANALYSER
  • Availability: 2
  • €295.00

  • Ex Tax: €295.00
  • Price in reward points: 150

Tags: Analox O2EII PRO - Nitrox ANALYSER