I just built a hyperbaric chamber, but I don't know how to measure the atmospheric pressure. I know I want to have 1.5 atmospheres inside the chamber when I'm using it, but I don't know how to tell if I've add more or less then 1.5 atmospheres of pressure.Sunday, December 18, 2011
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matador 89 - kuriouskat,
ReplyDeleteIt would be erroneous to suppose that you are not aware of all the details of ATA, ATM, PSI, and PSIG, as building the chamber in the first place would indicate that you must know about the technicalities. However I am a little confused by your statement that you wish to have 1•5 atm inside. I have always understood that a monoplace hyperbaric chamber should operate in maximum pressures from about 30 psi, (which is approximately 2.04 atm) and a multiplace chamber, from 75 psi, (which is approximately 5.10 atm). But it is yours and I have no business making these statements, forgive me! Unfortunately, you do not state your country of residence. I am aware of a firm in the UK who would be able to supply a gauge to measure the pressure. However if you do not live in the UK, you would be advised to Google for a location in your own country. I add their details below –
Commercial Diving & Subsea Gauges (CDS Gauges) is the sales & distribution arm of "Ashford Instrumentation" contact them at sales@cdsgauges.com
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Hope this helps
matador 89
Linda - Lots of gauges are available. Check http://andihq.com/images/stories/CAccCatalogAccessories110426.pdf
ReplyDeleteBe aware that in order to get a true 1.5 ata you need to calculate:
total pressure (psig) divided by 14.7 then + 1 + pressure in ata. next what is the purity of the oxygen delivered? 98% ? then multiply by .98
What is the delivery mechanism? Non-rebreather mask? multiply by .9
anesthesia mask or demand mask ? multiply by 1.0
The short answer is that you need 9 psig chamber pressure if using an oxygen concentrator and a non-rebreather mask. I hope that that helps.
BTW ... what does your chamber look like? I am an engineer that is active in this field.
Best wishes, Ed Betts
Peter - OMG you must be joking, you have built a device to add pressure to and have no way to determine the pressure inside. Thus you have made a device which could potentially explode and kill yourself and others around you.
ReplyDeleteAnd it seems that you are not a licensed and qualified chamber operator as well. If you where you would know the answer to the question and the errors in construction.
Guy - Please consider your design very carefully. ASME PVHO-1-2007 is a comprehensive US Standard that gives advice on safe design, Over Pressure Valves, acrylic windows, piping, testing etc. www.asme.org
ReplyDeleteASME PVHO-1 is mandatory in certain US States & cities as well as certain Canadian provinces.
Incorrectly built or operated chambers can kill the patient and operator.