Yes it is single pass, this particular model is an HP750C+. I had a wide format pen plotter before it and it would send the paper back and forth which was pretty mesmerizing but it required a lot of maintenance on the paper handling system so that the paper wouldn't slip.
The HP inkjet "plotter" works by rasterizing the plot in the host computer's memory and then sending strips of raster to the plotter. The dot resolution of the print head (replaceable, but not part of the ink system) matches the 0.7mm resolution of the pen plotters it replaced.
The HP inkjet "plotter" works by rasterizing the plot in the host computer's memory and then sending strips of raster to the plotter. The dot resolution of the print head (replaceable, but not part of the ink system) matches the 0.7mm resolution of the pen plotters it replaced.