An oxygen concentrator is a device that concentrates the oxygen from a gas supply (typically ambient air) by selectively removing nitrogen to supply an oxygen-enriched product gas stream.

Two methods in common use are pressure swing adsorption and membrane gas separation.
It can help some people who have trouble breathing due to conditions like:
An oxygen concentrator isn’t the same thing as an oxygen tank, which delivers liquid or gas oxygen. Instead, the concentrator is a machine that pulls in the air around you and filters out the nitrogen.
A thin tube runs from the device to your face, giving you purified oxygen through two open prongs below your nostrils. Some people use a facemask to get a higher concentration and flow of oxygen.
The COVID-19 pandemic increased the demand for oxygen concentrators. It is considered sufficiently foolproof to be supplied to individual patients as a prescription item for use in their homes.
Designed with pressure swing adsorption (PSA) technology. Secure and Reliable
Advanced oil-free compressor, save 30% power energy
Oxygen Output Concentration Levels: (reach the stated oxygen concentration level within 30 minutes after turning on the ma- chine): 93%+3% at the flowrate of 0.5-5L/min.

| Quantity | 1-10 | 11-20 | 21-30 | 31-40 |
| Price (USD) | 340$ | 300$ | 283$ | 270$ |
Oxygen Concentrator 5l Portable are used for supplying medical grade oxygen to prevent hypoxemia-related complications related to COVID-19, chronic obstructive pulmonary disease (COPD), chronic bronchitis and pneumonia.
Oxygen Concentrator is a lifesaving therapeutic medical gas for people suffering from severe pneumonia and other respiratory diseases, like COVID-19.
Oxygen Concentrator 7l Portable consisted of air compressor, adsorption tower of molecular sieve, sensor and flow meter. With the molecular sieve to be absorbent, the machine adopts PSA(pressure swing absorbers ) method to directly concentrate medical oxygen with high concen- tration from the air.

| Quantity | 1-10 | 11-20 | 21-30 | 31-40 |
| Price (USD) | 350$ | 310$ | 294$ | 280$ |
The machine takes the advantages of small in volume, light in weight, convenient in moving (as it has turning truck le), stable in performance, high in safety, easy in operating, low in noise, safe in working, which complies with requirements of medical device. The machine can also realizes the measurement and display of Spo2, and pulse rate by connecting accessories.
Oxygen Output Concentration Levels: (reach the stated oxygen concentration level within 30 minutes after turning on the ma- chine): 93%+3% at the flowrate of 0.5-7L/min.

The machine has a wide application, including family, clinic, hospital, oxygen bar, plateau outpost, gym center, etc.
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