I've been looking for something for a while to measure the flow rate from my oxygen cylinder that didn't cost too much and came across this today. Anybody tried it?
http://www.activeforever.com/p-2563...ogle-_-na-_-oxyview-oxygen-flow-meter-_-50379
http://www.activeforever.com/p-2563...ogle-_-na-_-oxyview-oxygen-flow-meter-_-50379