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Variability between high time-resolution PM data from regulatory instruments: implications for low-cost sensor evaluations
Citation:
Johnson, K., J. Rice, R. Vanderpool, Timothy Hanley, AND A. Clements. Variability between high time-resolution PM data from regulatory instruments: implications for low-cost sensor evaluations. 2019 AAAR Annual Conference, Portland, OR, October 14 - 18, 2019.
Impact/Purpose:
The performance of low-cost sensors is often evaluated against regulatory instruments at high time resolutions (e.g. 1-minute to 1-hour). However, little work has been done to evaluate regulatory instruments at these shorter time intervals. This research explores performance differences between high time-resolution regulatory instrument measurements and their implications for perceived sensor performance. The goal is to understand the impact of selected comparison method (e.g. FEM) and averaging interval for low-cost sensor evaluations so that future sensor evaluations by EPA and local partners can be better understood and compared.
Description:
This abstract describes work to be presented at the AAAR Annual Conference in October. The work will discuss the performance differences between a Teledyne T640x and Grimm EMD 180, their error with federal reference method measurements, and the impacts of these differences and errors on a PurpleAir low-cost sensor evaluation.