Dwyer Instruments' Model GDL-T Four Temperature Graphical Display Data Logger provides local, real-time data and graphical trends on an LCD. Front panel buttons allow users to see all four temperatures, graph display, logging summary, sample rates, memory used and memory left. This device can record up to 87,000 data points and download them to your PC for further analysis. Software, USB cable, digital manual, and batteries are included with this product.