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How do you calculate Nitrox mix?

4 min read

Asked by: David Kleiner

EAD = (Depth + 33) × Fraction of N2 / 0.79 − 33. Working the earlier example, for a nitrox mix containing 64% nitrogen (EAN36) being used at 90 feet, the EAD is: EAD = (90 + 33) × 0.64 / 0.79 − 33. So at 90 feet on this mix, the diver would calculate their decompression requirements as if on air at 67 feet.

How do I find the best nitrox mix?

If we want to dive with a maximum oxygen partial pressure of 1.4 bar the process of finding the “right” blend of nitrox simply requires us to divide 1.4 by 3.6, which equals 38.8, and that is the blend of nitrox (the percentage of oxygen) that would work for our dive!

How do you mix nitrox?

All you're going to do is take point three six point three six you're going to times it by 200. It's going to give you 72 bar. You're going to take point three two you're going to times it by 67.

How does nitrox calculate max depth?

Maximum Operating Depth Formula

For a dive where we want to not exceed our 1.4 maximum pressure of oxygen with a 32% nitrox blend this would be your formula: 1.4 / 0.32 = 4.375.

What is the 40% rule in nitrox diving?

In essence, the 40 Per Cent Rule states that, “If a regulator, cylinder or valve will not be exposed to gas mixtures with an FO2 greater than 40 percent, at pressures greater than regulator intermediate pressure, they need not be O2 clean or service rated.” The 40 Percent Rule is widely accepted by divers, dive shops,

How deep can you dive with 32 nitrox?

121 feet

However, when diving on nitrox, the potential for oxygen toxicity lurks well within the depth range of recreational diving: the maximum depth on 32 percent nitrox is 121 feet; on 36 percent nitrox, it’s just over 100 feet.

What is the mod for 32 nitrox?

Nitrox MOD Table

in feet (saltwater) in meters (saltwater)
30% 121 43.3
31% 116 41.6
32% 111 40.0
33% 107 38.5

What percent of n2 and O2 is present in the given nitrox tank?

The air we breathe is Nitrox 21, which basically means it has 21% oxygen and 79% nitrogen.

How do you fill a nitrox tank?

We can fill high pressure tanks (up to 3500 psi). If you want a Nitrox fill which is above 32% Oxygen, we can fill it using a partial pressure blend, provided your tank is oxygen cleaned.

Fill Prices
Paintball Fills $10-$15

How do you analyze a nitrox tank?

The first method is you turn on your nitrox analyzer. And then you want to adjust the number up top to read 20.9 r21 we're going to make sure reads 20.9.

What is PO2 in nitrox diving?

As of September 5, 2015, the NOAA Diving Program’s maximum oxygen partial pressure (PO2) level was reduced from 1.6 ATA to a maximum of 1.4 ATA. This PO2 level is currently the standard in the military and other federal, civilian and the vast majority of academic diving programs.

Can I fill my nitrox tank with air?

Filling a Nitrox tank with air is possible.

However, once you do the tank is no longer safe to be used for Nitrox until it has been oxygen serviced. Any tank having a standard air fill will need to be serviced before using EAN. If you plan on using both air and Nitrox, it may be best to get a second tank.

Do you need a special regulator for nitrox?

Almost any regulator you already own can be used for this type of service with no special modifications or cleaning, although some manufacturers may void a warranty when a regulator not designed for Nitrox service is used with Nitrox.

Can you get Nitrox certified online?

Complete your course online.

The PADI Enriched Air Nitrox course is PADI’s most popular specialty course and can now be taught and certified entirely online. The open water dives for this course are optional, and therefore can be conducted, if desired, at a later date.

At what depth does oxygen become toxic?

Oxygen toxicity occurs in most people when the partial pressure of oxygen reaches 1.4 atmospheres or greater, equivalent to slightly over 187 feet (57 meters) depth when breathing air (shallower depths when breathing oxygen concentrations greater than 20%).