The CL-S521 offers a reliable, easily integrated industrial desktop printing solution. These units are supplied as standard with on-board ZPL® and Datamax® emulations plus BASIC Interpreter programming support, offering maximum flexibility and easy compatibility with other applications. Handles a range of media types, including specialized labels and wristbands. Powerful on-board 32 bit processor for fast output. 16Mb of RAM and 4Mb of flash.
Citizen CL-S521 Desktop Printer Data Sheet.pdf
https://www.midwestbarcodingsolutions.com/content/product_downloads/other/Citizen CL-S521 Desktop Printer Data Sheet.pdf
MFG Part Number
Adjustable Black Line Sensor