Ozone vacuum-ultraviolet (VUV) ozone generators, employ a light source that generates a narrow-band ultraviolet light, a subset of that produced by the Sun. The Sun's UV sustains the ozone layer in the stratosphere of Earth. UV ozone generators use ambient air for ozone production, no air prep systems are used (air dryer or oxygen concentrator), therefore these generators tend to be less expensive. However UV ozone generators usually produce ozone with a concentration of about 0.5% or lower which limits the potential ozone production rate. Another disadvantage of this method is that it requires the ambient air (oxygen) to be exposed
Captain Video: Master of the Stratosphere all wear uniforms that look like those of the Video Rangers of 1951. In any case, the hero in "The Lost Planet" is a newspaper reporter named Rex Barrow, also played by Judd Holdren. As in the "Captain Video" serial, there is also an evil earth scientist, Dr. Grood (Michael Fox), in cahoots with Reckov of the Lost Planet. "Captain Video: Master of the Stratosphere" was very successful when first released to theaters, and kept playing long after other serials had been retired to the vaults. It is one of only two serials that Columbia reissued three times (in 1958,