As a member of AARST, I applaud the Desert News for making citizens aware of the
danger of radon gas. There are no safe levels of radon, which causes 21,000
deaths per year through lung cancer. It is important to note that the component
in the photograph is a U-Tube manometer, which is used to measure the negative
pressure being generated beneath the slab of a structure by a radon mitigation
system. This device does not measure radon gas. You may want to consider an
errata including a photograph of a continuous radon monitor or an activated
carbon short term test kit.