StarTech.com USB to Serial Adapter - Prolific PL-2303 - 3 ft / 1m - DB9 (9-pin) - USB to RS232 Adapter Cable - USB Serial - Add an RS232 serial port to
RS232-to-USB Adapter for connecting the analyzer to USB port on computer - EQ-BACC-8D
USB to RS232 Adapter with PL2303 Chipset, CableCreation 6.6 ft USB 2.0 Male to RS232 Female DB9 Serial Converter Cable for Cashier Register, Modem, Scanner, Digital Cameras, CNC,Black - Walmart.com
BB-USO9ML2-LS-A - ULI-321DCK - USB 2.0 to RS-232 Converter, DB9 Male. Isolated. Locked Serial Number - Advantech
USB to Serial Adapter – Trouble Free!!
High-Speed USB-to-Serial Adapter for Windows 8 32/64-bit - U.S.Converters
pro snake USB-RS232 Adapter 2.0 – Thomann België
RS PRO RS232 USB A Male to DB-9 Male Converter Cable | RS
USB to Industrial 5Volt RS232 Serial Adapter FTDI - Coolgear
Amazon.co.jp: USB 2.0 TO 4 Port Serial RS-232 COM DB9 Male Adapter Cable FT232 USB-4x RS232 : Computers
Amazon.com: Plugable USB to Serial Adapter Compatible with Windows, Mac, Linux (RS-232/DB9 DTE Male Connector, Prolific PL2303HX Rev. D Chipset) : Electronics