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Good day
As I am looking through the application note(TIDA-00378), I am wondering what is the maximum airflow that will give reliable results. I am planning to use this particle sensor in a device that will need a fan to draw the air into the sensor chamber.
Can anyone please help with some guidelines?
While I'm doing some additional research on this, I'm wondering if you read in detail the setup and testing guide provided: www.ti.com/lit/ug/tidub65c/tidub65c.pdf ?
The design guide describes the equipment we used to characterize the design. For quick lab tests I would suggest the DUSTTRAK DRX AEROSOL MONITOR 8533. These can be rented (or purchased) and have good accuracy. The only thing about these is that they measure particle mass, not particle count. Also, you still need a mechanism to generate particles (dust, smoke, etc.).
For a full characterization test, you probably want to use a 3rd party lab. Intertek in the NY area has a lab set up for air purifiers which can be re-purposed for particle sensor tests.
The airflow we used for our tests is documented in the design guide. That was dictated by the airflow of the equipment we used to characterize the design. Unfortunately, we didn't do testing using different airflows to understand impact on accuracy.
