O2 Analyzer For A Recompression Chamber

[BoltSnap]

A local sponge diver in Libya is setting up a small recompression chamber to treat injured divers and needs to install an O2 analyzer to test the O2 % in the "ambient" air inside the chamber. Can anyone here recommend or know of a specific model for this purpose please?

Note: I am not looking for a O2 analyzer that tests gas coming out of a tank under pressure, we are looking for an analyzer that can test the O2 % in surrounding air in a chamber under ambient pressure in the chamber.

I need specific makes and models please with links.

 

[tbone1004]

why is he filling the whole chamber with o2 instead of a helmet? very inefficient if using modern tables due to the air breaks. You also have to find an analyzer that has a PPO2 range to go high enough for a Table 6, so it has to be accurate up to a PPO2 of 3.0. Would be much cheaper if they used a flexible bell and just pumped known gas mixtures through it

 

[BoltSnap]

why is he filling the whole chamber with o2 instead of a helmet? very inefficient if using modern tables due to the air breaks. You also have to find an analyzer that has a PPO2 range to go high enough for a Table 6, so it has to be accurate up to a PPO2 of 3.0. Would be much cheaper if they used a flexible bell and just pumped known gas mixtures through it

No, he is using a Mask for O2 but he wants to verify the O2% in the chamber as to detect any leaks or issues with increased O2% in the ambient air inside the chamber.

 

[Duke Dive Medicine]

Here are a few from the Amron International web page:

Search results for: 'O2 analyzer'

Best regards,
DDM

 

[BoltSnap]

Here are a few from the Amron International web page:

Search results for: 'O2 analyzer'

Best regards,
DDM

These are standard type of analyzers used for testing O2% in a gas under mixture in a pressurized container. What we are looking for is an analyzer that works in the same way a "CO" alarm works in your house and gives the O2% on a display.

Since you are affiliated with Duke, do your recompression chambers have this feature to analyze the ambient "air" in the chamber and give the O2% in this air without requiring the flow of the air inside this analyzer?

 

[kelemvor]

This was in the link Duke provided, and appears to do what you're asking. Analox O2NE+ Analyzer 230V AC UK Plug for Use in Inert Gas Environments AX1BK10X55QXY01

 

[Duke Dive Medicine]

Like kelemvor pointed out, some of the analyzers in the link are appropriate for use in a hyperbaric facility. The hyperbaric complex at Duke has a sample line in each chamber that is plumbed through a penetrator to a manifold and then to an O2/CO2 analyzer.

Best regards,
DDM

 

[iain/hsm]

You don't describe the chamber or the application in enough detail but to kick off.

In general for a hyperbaric or deck decompression chamber it is generally accepted that the maximum allowable leakage of oxygen (from the BIBS masks) into the surrounding chamber is 23% and therefore constant oxygen monitoring is required. If so then and simple galvanic oxygen monitor would be acceptable with some additional plumbing valves and pipework required.
However If your requirement for this chamber is to comply with Divers Alert Network (DAN) and that you wish to be paid for treatments, under the DAN insurance cover then the chamber would require some form of data logging.

That is in addition to the oxygen percentage you would also need to monitor in real time and to log in real time in addition the level of C02, the depth, time and temperature. These have to have suitably approvad and cost around $5000 somewhat less than half the price of those illustrated in an earlier post

For pricing a full 02 and CO2 gas analyser with depth and temp monitoring and with full data logging is the Analox Sub MkII listed at $10,767 in the earlier post, In the UK it is around $5.000 and in stock available ex works.

In either case the 240 volt 50Hz unit suggested would not be acceptable unless a suitable 30mA ELCB electrical safety system was installed and in any case the voltage and Hz in Libya is 110/220V 50 Hz and would have to be checked. As a general principle 30 VDC is the maximum voltage allowed on the skin of a diving chamber for safety reasons.

The photo below shows one of the chambers we built with DAN approval with a simple monitor arrangement. I will photo the current data logger units when back in the office and can email full details if of interest. Iain

[/URL]

 

[BoltSnap]

You don't describe the chamber or the application in enough detail but to kick off.

In general for a hyperbaric or deck decompression chamber it is generally accepted that the maximum allowable leakage of oxygen (from the BIBS masks) into the surrounding chamber is 23% and therefore constant oxygen monitoring is required. If so then and simple galvanic oxygen monitor would be acceptable with some additional plumbing valves and pipework required.
However If your requirement for this chamber is to comply with Divers Alert Network (DAN) and that you wish to be paid for treatments, under the DAN insurance cover then the chamber would require some form of data logging.

That is in addition to the oxygen percentage you would also need to monitor in real time and to log in real time in addition the level of C02, the depth, time and temperature. These have to have suitably approvad and cost around $5000 somewhat less than half the price of those illustrated in an earlier post

For pricing a full 02 and CO2 gas analyser with depth and temp monitoring and with full data logging is the Analox Sub MkII listed at $10,767 in the earlier post, In the UK it is around $5.000 and in stock available ex works.

In either case the 240 volt 50Hz unit suggested would not be acceptable unless a suitable 30mA ELCB electrical safety system was installed and in any case the voltage and Hz in Libya is 110/220V 50 Hz and would have to be checked. As a general principle 30 VDC is the maximum voltage allowed on the skin of a diving chamber for safety reasons.

The photo below shows one of the chambers we built with DAN approval with a simple monitor arrangement. I will photo the current data logger units when back in the office and can email full details if of interest. Iain

[/URL]

Please do send me or post whatever information you have.