IR is the way to do it.
The wavelength is 4.25u and you will need to use a dual wavelenth or similar technology to eliminate interference from water vapour in the exhaled breath.
A small lamp bulb will make a good IR source.
Murata make a pyroelectric detector with a built in CO2 band filter...
Thanks for the response. Perhaps I should rephrase my question at this stage an ask if anybody can advise on whose membranes are likely to be the most suitable.
The loss of water is not as much of a problem as ability to tolerate water vapour. The best membrane will retain most of the oxygen and...
Thanks for the response, the patent you mentioned is not exactly relevant to my application as it is a gas/fluid tranfer membrane. My application is a gas only membrane as my breathing apparatus will not be in the water.
Do you have any more reference material that you think might be relevant to...
I wonder if it would be possible to remove CO2 from an oxygen mixture used in breathing apparatus.
By remove I mean reduce by a percentage (50% would be nice). I will be continuously recirculating the gas through the membrane. The gas mix will be 98% oxygen and 2% CO2. There will be a high...
