The PurpleAir PA-II sensor is very reliable. Three years ago we deployed 25 sensors throughout our region and they are all still running strong with high confidence.
James Lucas
I ordered a sensor last year to get accurate air quality readings in my neighborhood. The sensor works GREAT, customer service is GREAT, and I have no complaints. Highly recommend this product and company.
Patty Thomas
Brilliant company, responsive to customers' needs. The sensors are an excellent product and are gaining many fans in New Zealand.
There are a number of ways to measure particulate matter; these methods vary widely in their cost, labor, and hardware requirements. For the purposes of this blog, these methods are going to be sorted into three categories: federal reference methods, federal equivalent methods, and low-cost sensors.
