Choosing a portable oxygen concentrator

freedom with oxygen

You are looking for a portable oxygen concentrator to feel more free and just go out and about, even if you depend on supplemental oxygen. But which one should you choose? Which trait should you let prevail? Or is there an ideal? Read all about it in this blog.


Why do I choose an oxygen concentrator?

Some people have such limited lung function that they do not get enough oxygen by simply breathing. A pulmonologist may then prescribe supplemental oxygen. A person who needs supplemental oxygen can choose from a variety of oxygen sources.

Liquid oxygen system, a large 35ltr tank from which small supplies can be tapped for outdoor use
(portable) cylinder, be filled with 2 liters of oxygen under pressure, weighs less than 5 kg
Concentrator, an electric generator that sucks in air and filters it into concentrated oxygen

Like everything in life, there are advantages and disadvantages to each method. When considering convenience and safety, we at Conec Care find a concentrator to be the most pleasant oxygen source. The disadvantages of a concentrator (makes noise, requires electricity and ventilation) are generally easy to solve. But the advantages easily outweigh these disadvantages.

How does a portable oxygen concentrator work?

An oxygen concentrator is an oxygen source that creates medicinal oxygen from ambient air using a motor and a sieve/filter system and offers it to the user in a concentrated form through a tube. A portable oxygen concentrator is such a similar system, but smaller, lighter, and equipped with a battery as a power source. This allows you to be out and about independent of mains power. Ideal for vacation, a walk, museum visit, or an afternoon of shopping. So a portable acidophosphate concentrator gives you freedom and that is priceless.

What is the ideal portable oxygen concentrator?

The ideal oxygen device is a concentrator that

  • Small and light is
  • Long time without power can
  • Can produce a lot of oxygen in ‘continuous flow’

Unfortunately, there is no device that meets all of these characteristics. In the end, you have to settle for a compromise.

Size and weight affect the amount of oxygen that can be produced and the time the device can operate without recharging. The smaller the battery, the less time it can last. The smaller the device, the less quickly it can be filtered and thus the maximum production is limited.

Continuous flow oxygen delivery requires so much energy that it will greatly limit autonomy. Therefore, all portable devices are equipped with a “pulse dose” system. Only when there is a demand for oxygen in the nasal bulb does the oxygen concentrator produce a puff of oxygen. This is very fast and very precise, so it works well for almost everyone, but it is not suitable for delivering oxygen when using a mask or, for example, in combination with a CPAP device. There are solutions for that, but about that in the article about autopulse. Even if you are convinced that you need to rely on continuous flow, we can see if autopulse is a solution for you.

Are there no portable concentrators with continuous flow at all?

Yes, there are, but with important limitations. The maximum oxygen production is limited to 2 sometimes 3 liters per minute, the maximum time the device can be used without recharging is very limited per individual battery (think 1-2 hours) and the weight of the available devices is between 4.5 and 8.3kg. You can think of this class more as a portable oxygen concentrator. You can move around with it independent of a power point, but it’s not pleasant to use.

So what choice do I have?

Conec Care supplies Inogen’s products because we believe in the quality and durability of this company. We think that alternative brands like Philips, GCE are fine options, but that the Inogen concentrators are better. Inogen sets the standard in the market.

Within Inogen’s portable range, there are 3 choices

typeBattery typeWeightbattery lifepositionsBattery typebattery life
Inogen One G3BA3002.2 kg4.5 hours5BA3169 hours
Inogen One G4BA4001.3 kg2 hours3BA4084 hours
Inogen One G5BA5002.1 kg6.5 hours6BA51613 hours


Comparison Inogen one g4 and g5

What type of Inogen One oxygen concentrator should I choose?

Check out the advice below to see where you fit in best.


If you are looking for the most flexible solution possible and find a weight of between 2 and 3 kg acceptable, opt for the G5, or if you want to save some money for the G3. The G5 is more modern than the G3, has a longer battery life and can produce just a bit more oxygen, but the G3 is a bit cheaper in most cases.

If you want to fly and need extra oxygen while flying, choose the Inogen One G3 or G5. While the weight is slightly higher than the G4, it is acceptable at 2-3kg. And the battery life is so generous that you can get by with fewer batteries.

If your oxygen requirements are not stable and may be growing, choose the G5 or G3. If you choose the G4 and your needs become higher than 3 liters per minute, this device will be of no use to you and you will have to look for an alternative with higher oxygen production.

Volume and weight

If a small size and as low a weight as possible is essential, choose the Inogen One G4, provided your oxygen needs are stable at 1 or 2 liters, with a maximum outflow of up to 3 liters per minute.

If you want to fly, but weight is essential, choose the Inogen One G4, provided this device fits your oxygen needs. However, you will need to carry more batteries. This is expensive and also adds to the overall weight, but the device you carry yourself is lighter than an alternative. The remaining weight can be put in a bag or suitcase

oxygen consumption

If you mainly spend a shorter time around the house or hotel, you mainly travel by car, and your oxygen needs are stable at 1 or 2 liters, with a maximum runout to 3 liters per minute, then you can choose any alternative. But the G4 will then also suffice and it is the most pleasant because it is so small and light.

If your oxygen needs are above 3 liters per minute, choose the Inogen One G5 or the G3.


If you are often in remote areas, choose the G3. There are easier parts to get for this, has been on the market for so long that you have a greater chance of receiving these parts quickly. In addition, we or other Inogen dealers can provide remote support more easily.

And? Which portable oxygen concentrator will you choose?

If you now know which portable oxygen concentrator is best for you, contact Conec care. We almost always have these 3 portable devices from Inogen generously in stock. And we offer worry-free service at the best price.

Don’t you know it yet? If so, give us a call or have us call you back; we can look further together at how we can help you choose.

Trying out your oxygen concentrator first before you buy it? At Conec Care you can try out different types so you can experience for yourself which type is most suitable for your personal situation.

Conec Care

Conec Care is an official distributor of Inogen. We rent and sell Inogen throughout Europe and through our sister companies also in Kenya and South America. You can visit us upon request, but we are happy to come to you for a demo.

Call us at + 31 85 48 99 400 for an appointment or for more information.