Met One Instruments, Inc. (MOI)

Air Monitoring Indoors Reliably

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Courtesy of Met One Instruments, Inc. (MOI)

There are a lot of PM indoor air monitors for sale online.  Most are made in China and a few are made in the USA. However, for reliable monitoring, make sure your manufacturer is experienced in the science of air monitoring.  Met One Instruments has been monitoring the air around the world and in the US for more than 30 years and is used by government agencies who require reliable data to protect their citizens.  Our recommendation for current AQ is AirNow at

For your personal use, it is important to get a reliable monitor. Of course, it will cost more than $200 but, your health is worth it. Please visit to see our line of indoor and outdoor monitors and contact one of our sales representatives at

Air Monitoring Indoors Reliably

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