The Pro Series 3 electronic radon gas detector is designed to protect your family from lung cancer due to radon gas exposure. The detector allows the homeowner to monitor the radon level in their home with an easy-to-read digital display. Radon is a colourless, odourless and tasteless radioactive gas and is impossible to detect without the use of sensitive test equipment. Radon gas rises through the soil and seeps through cracks, holes and drain pipes in the foundation or basement. Radon is a naturally occurring gas produced by the breakdown of uranium in soil, rock, and water. When it is allowed to accumulate at high levels, it can be hazardous to long-term health. Radon is the second cause of lung cancer after cigarette smoking. Health Canada has established the acceptable levels of radon in the house should not exceed 200 Bq/m.