AirVision Site Node represents a hybrid between AV-Trend and the capabilities in AirVision to directly poll instruments.

In this iteration, the site PC is used to both collect data from a Model 8816 or Model 8832 data logger, and directly poll local instruments (BAM, API, Thermo). The Node then uses the node-node transfer to move data to the AirVision central node.

Local database would generally be the free SQLEXPRESS version of SQL (4 GB, roughly a year of minute data, several years of hourly data).

Digi-Trend systems under support would be subject to a small additional upgrade cost to 'promote' an AV-Trend system to a full Site Node.