Aerox announced at Sun ’n Fun that it has received FAA technical standard order (TSO) approval for its 4110-712 series medium-altitude oxygen mask. Aerox said it is the only manufacturer that holds TSO approval for this type of mask, which is certified for use up to 25,000 feet.
To earn the approval, Aerox had to perform a variety of tests on the mask. For example, the Typical Fit Leak Test was performed on 88 people, both male and female, from 5 to 75 years of age. The TSO testing, conducted by Aerox and independent laboratories, took more than a year to complete.
Oxygen use is mandatory for pilots when flying unpressurized aircraft above 14,000 feet. Below 18,000 feet, pilots have the option of using a cannula or a mask, although a mask is required above 18,000 feet.
Aerox said that its TSO-approved medium-altitude oxygen mask can be used as a direct replacement for any oxygen mask certified to 25,000 feet.