The device for measuring the current or emf is connected within the circuit of the thermocouple. It measures the amount of emf flowing through the circuit due to the two junctions of the two dissimilar metals maintained at different temperatures. In figure 2 the two junctions of the thermocouple and the device used for measurement of emf (potentiometer) are shown.
I think that this is what advertisers are shooting for when they pay the big price to get their ads up there. Regular billboards are just as effective as ever, even though there are now digital billboards being made that can have multiple ads on them and switch between them every few seconds.
Programmatic ads are placed using artificial intelligence (AI) and real-time bidding (RTB) for online display, social media advertising, mobile and video campaigns, and is expanding to traditional TV advertising marketplaces. Marketing Landâs guides to programmatic ads and media buying: