Welcome to our website

We are Shenpix International Co.,Ltd.,
a Japanese company established in June 2010. We are producing unique medical equipments, and we have developed two unique, first-in-the-world products.

Ladies and Gentleman,
Why don’t we take oxygen in more
effectively and more comfortably?

Surplus carbon dioxide is not desirable for our health and the earth.

But people with an oxygen mask and oxygen concentrator are taking in carbon dioxide beyond the worldwide standard.

This is the world's first mask
for taking oxygen in more effectively
and more comfortably.

CO2 Free Mask
The nose (air intake) and mouth (exhaled breath=38,000 ppm carbon dioxide) are divided in the CO2 Free Mask; the lower part of the mask opens and excretes the exhaled breath outside. Therefore, the oxygen density in the mask increases. When using the CO2 Free Mask, we don't take in the high-density carbon dioxide that is in exhaled breath.  

Its design has been registered in The United States ,28 countries in the EU ,Taiwan ,Kore ,China and Japan.
The CO2 Free mask is for personal use. A disposable medical oxygen mask with the same principle will be launched in August 2016.

Do you know these truths?

Carbon dioxide in the atmosphere is usually 400~500ppm.
The upper limit for carbon dioxide as a worldwide environmental standard in buildings is 1,000ppm.
The carbon dioxide that is in human exhale breath is about 38,000ppm. It is so higher level than 400ppm in the normal atmosphere.
Carbon dioxide in the usual type of oxygen mask is 2,000~3,000ppm when putting high density oxygen in the mask at four liters per minute while breathing and we are taking in it with oxygen.

All oxygen concentrators worldwide concentrate carbon dioxide as well as oxygen at 4~4.7 times the normal level.

The relationship between carbon dioxide and health
(There are individual differences between carbon dioxide and health.)

Unpleasantness can be felt at more than 1,000ppm.
Sleepiness can result at 2,000ppm.
Headaches or dizziness can be felt at 3,000ppm.
These truths clearly mean that it is not good to take in surplus carbon dioxide.

Differences between the CO2 Free Mask and conventional oxygen mask.
Conventional oxygen masks cover the nose, which takes oxygen in, and the mouth, which excretes exhaled breath containing 38,000 ppm carbon dioxide; high-density carbon dioxide is stopped in our mask. When oxygen is put in our mask, the carbon dioxide density becomes weak.

In a conventional oxygen mask, carbon dioxide with 2,000~3,000 ppm still remains, and the undesirable high-density carbon dioxide is still being taken in.

Oxygen density and carbon dioxide in a conventional oxygen mask with an oxygen concentrator.

Experiment by the usual type mask


Although the high density oxygen and carbon dioxide from an oxygen concentrator are supplied into the mask, it is the actual situation that they are mixed with the atmosphere and exhaled breath in a mask, which density falls substantially together. Carbon dioxide of around 38,000 ppm is included in exhaled breath. Although it is diffused and falls sharply in a mask, it is still more than twice the upper limit value of the indoor environmental worldwide standards.

Oxygen density and carbon dioxide in the CO2 Free Mask with an oxygen concentrator, and breathe in by the nose and breathe out by the mouth.

Experiment by CO2 Free Mask

Since the nose portion and the mouth portion are divided inside in the CO2 Free Mask, the capacity of the nose portion to which oxygen is supplied is small, so concentration oxygen is difficult to spread and carbon dioxide in exhaled breath is not mixed, which is why the oxygen density in the CO2 Free mask improves over 30 % compared to a conventional mask. Carbon dioxide 4~4.7 times more concentrated than that of atmosphere or a room at that time of supply is 2,000~2,500 ppm, but it spreads in a mask, and the carbon dioxide included in exhaled breath is not added at the same time, so its density is about half of a conventional oxygen mask. When the CO2 Filter is connected between an oxygen concentrator and the CO2 Free Mask, it removes concentrated carbon dioxide and as result, the carbon dioxide level becomes approximately the same value as the atmosphere ( or indoor ).


1.The carbon dioxide value in the laboratory of this time was 500~600 ppm on the average. ppm display is changed very easily, it has, therefore, written the average numerical value.
2.If oxygen is directly blown upon an oxygen sensor, its sensor reacts sensitively and can’t measure the concentration in a mask, so a hood is attached to the sensor and oxygen was kept from hitting it directly.
3.Except the degree of diffusion, the result was almost the same on the whole as a theoretical value.
4.When all oxygen concentrators worldwide increase the flow rate, the density falls.

By the way, when using an oxygen mask in medical treatment, attention is being called so that carbon dioxide in exhaled breath isn’t taken in again. The method is to spend more oxygen in a mask, but even if pure oxygen of 100 % is supplied 4~8 liters per minute from an oxygen cylinder in a conventional oxygen mask, much oxygen leaks outside a mask, so the density does not rise from around 35 % and the carbon dioxide in exhaled breath also remains around 2,000~2,500ppm in a mask.

CO2 Free Mask

When using the CO2 Free Mask, please breathe in by the nose and breathe out by the mouth as much as possible. This is a healthy breathing method too. As the lower part of the mask opens, there is no inconvenience in conversation. We recommend using the CO2 Free Mask for people who use a cannula. If breathing in and out by the nose, carbon dioxide will be taken in as much as a conventional oxygen mask. The person who can only breathe through the mouth can’t use this mask.

Then Ladies and Gentleman,
take in and enjoy the high-concentrated oxygen effectively and comfortably, please.

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