Low cost IAQ meters don’t work. They’re not accurate, and we discourage homeowners from relying on these Amazon purchases to see if their home is healthy. In fact, many of my clients have suffered from years of poor indoor air quality. That’s because they thought their low cost IAQ meters were accurate. We’ve seen countless instances when discovering toxins in their home they are able to remove at the source. Thus making their homes healthy again leading to a decrease in symptoms.
They utilize very low cost metal oxide semiconductor (MOS) sensors to determine IAQ parameters MOS sensors, when combined with a circuit.
Some manufacturers employ CMOS sensors for monitoring total volatile organic compounds (TVOCs), carbon monoxide (CO), and in some cases to derive carbon dioxide (CO2) concentration.
CMOS sensors are not overly specific to gases and also react to many non-target gases. So this leads to many false positive readings, and in some cases underreporting.
CMOS sensors are sensitive to relative humidity, which can impact the performance. Because the sensor element is heated, the resistance of the sensing layer is affected by ambient temperature changes.
High end accurate sensors require routine self and manufacturer calibration. However, these low cost unit do not have the calibration processes necessary for accuracy.
Do not risk your family’s health with bad data. Consult with an experienced indoor air quality professional to routinely monitor your home’s air quality. And take corrective actions as necessary based on accurate information. IndoorDoctor can analyze your air quality for mold, chemicals, allergens, and toxins.
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