The Met One BAM-1020 is a continuous particulate monitor that is designated as the US EPA Equivalent Method for PM10, PM2.5 and PM10-2.5 monitoring.  It is designed for long term, low cost unattended remote operation.  No filters or gravimetric analysis are necessary for the BAM-1020.  All the data is stored internally in a variety of formats, which can be accessed remotely via Ethernet.