PreciseFlow has both continuous and conserver modes.

by Paul Bertorelli

No one would ever mistake owning a light airplane for a riot of efficiency. Fuel tops the lists of resources we wish we could get more out of, but owners who use oxygen may wonder if even half of what they buy makes it into their lungs. Traditionally, light aircraft oxygen systems constant flow the stuff near your nose or mouth and what you don’t breath leaks uselessly into the cabin.

The better way is oxygen conserving cannulas and, more recently, purpose-made oxygen conservers that apply some intelligence to how oxygen is flowed into a mask or cannula. Essentially, oxygen conservers are delicate valves that sense when you’re about…