Airthings Corentium Radon Gas Monitor

We have had one of these instruments for several years now. Initially, we used it to assess the radon present in the basement, particularly the unfinished crawl space of our side-split house. We had readings that were in the 300 Bq/m3 region in most of the basement and main floor during the winter. We followed directions of a qualified radon remediation expert to do our own remediation. During that process, we found the readings went above 1100 Bq/m3 as we prepared the crawl space for the ventilation of the ground. The instrument gave rapid indication of radon count, which helped to assess progress at all stages of the work. With the work completed. we soon averaged a count of less than 50 Bq/m3 in the crawl space and less than 20 Bq/m3 in the remainder of the basement and living spaces of the house. Often it is below 10 counts. This instrument has been lent out to numerous friends and neighbours over the time too. It is highly recommended, and we remain using it to keep an eye on the levels.