The Epson WorkForce Pro WF-4630 printer model uses the drop-on-demand thermal inkjet technology, which also has the piezoelectric component. The nozzle configuration comprises 680 nozzles

Epson WorkForce 845 is a particular printer model with a standard 4-color ink cartridge but a unique drop-on-demand Micropiezo inkjet technology. The supported printer language

The Epson WorkForce 840 printer model runs by print-on-demand thermal inkjet technology, a piezoelectric system. It also has a nozzle configuration that includes 384 nozzles