Ranked 1st in our list of recommended gas detectors & alarms and sells for $149.00 (as of 23/05/2023 18:17 PDT details ) , more than 64% of the AirThings 2900 reviews are positive. With features such as radon is the leading cause of lung cancer among non smokers and is found in every home and radon gas fluctuates daily and needs constant monitoring to minimize the health effects, it is indeed our top pick among gas detectors & alarms.