Dylos air quality monitors are affordable consumer-grade particle counters designed for monitoring particle pollution levels in the home. They can detect a host of airborne irritants including dust, mold, pollen, bacteria, tobacco smoke, pet dander, dust mite debris, and more. As true laser particle counters, these units are very accurate. They will monitor and store data so that you can analyze the cleanliness of your home's air and the effectiveness of your air purifiers and filters. These monitors are great tools for allergy- and asthma-sufferers and anyone who wants to monitor the quality of the air they breathe.